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WO2024170781A1 - Spectacle lens and method - Google Patents

Spectacle lens and method Download PDF

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Publication number
WO2024170781A1
WO2024170781A1 PCT/EP2024/054080 EP2024054080W WO2024170781A1 WO 2024170781 A1 WO2024170781 A1 WO 2024170781A1 EP 2024054080 W EP2024054080 W EP 2024054080W WO 2024170781 A1 WO2024170781 A1 WO 2024170781A1
Authority
WO
WIPO (PCT)
Prior art keywords
ring
shaped
structures
variable
width
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2024/054080
Other languages
French (fr)
Inventor
Liu OUYANG
Songjin ZHANG
Philipp Jester
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carl Zeiss Vision International GmbH
Original Assignee
Carl Zeiss Vision International GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carl Zeiss Vision International GmbH filed Critical Carl Zeiss Vision International GmbH
Publication of WO2024170781A1 publication Critical patent/WO2024170781A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/021—Lenses; Lens systems ; Methods of designing lenses with pattern for identification or with cosmetic or therapeutic effects
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/022—Ophthalmic lenses having special refractive features achieved by special materials or material structures
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C2202/00—Generic optical aspects applicable to one or more of the subgroups of G02C7/00
    • G02C2202/20—Diffractive and Fresnel lenses or lens portions
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C2202/00—Generic optical aspects applicable to one or more of the subgroups of G02C7/00
    • G02C2202/24—Myopia progression prevention

Definitions

  • the present invention relates to a spectacle lens according to the preamble claim 1 and to a method being configured for calculating by a computer a digital twin of a spectacle lens according to the preamble of claim 8.
  • WO 2019/166659 A1 discloses a spectacle lens comprising concentric rings, arranged as shown in figure 1 1 b and described on page 20, lines 10 to 12.
  • a spectacle lens comprising an annular cylindrical microstructure, arranged as shown in figure 1.
  • the central optical area is circular having a radius of 5 mm to 10 mm, the center of the spectacle lens being the center of the circle.
  • the annular cylindrical microstructure is located outside the central optical area having a radius between the one of the central optical area and 20 mm or more.
  • the radial width of the annular cylindrical microstructures is 0.5 mm to 2 mm.
  • the distance between the different cylindrical microstructures is 0.5 mm to 3 mm.
  • EP 4 006 624 A1 discloses a spectacle lens having an aperture and at least two ring-shaped focusing structures surrounding the aperture wherein a ring-shaped diffuser is formed by a ring-shaped contact line between the ring-shaped focusing structures.
  • PCT/EP2022/053854 discloses a spectacle lens comprising ring-shaped focusing structures surrounding a central clear zone having a central clear zone width of 6 mm to 9.4 mm.
  • the ringshaped focusing structures have a width of equal or lower than 0.7 mm.
  • the problem to be solved is to provide a spectacle lens comprising structures without causing discomfort to a spectacle lens wearer while preventing habituation of the spectacle lens wearer to the spectacle lens.
  • the problem has been solved by the spectacle lens according to claim 1 and the method being configured for calculating by a computer a digital twin of a spectacle lens according to claim 8.
  • the spectacle lens according to the invention comprises a central zone having a central zone width within a range of 6 mm to 9.4 mm, and at least one of
  • each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of diffusing structures having a respective uniform width, said uniform width being equal to or lower than 0.7 mm, each ring-shaped structure of said plurality of ring-shaped structures having a surface power which is different to a surface power of a lens surface of said spectacle lens comprising said plurality of ringshaped structures outside a domain occupied by each ring-shaped structure of said plurality of ringshaped structures, said spectacle lens having a surface-based fill factor defined as a surface area ratio of a surface area of an innermost ring-shaped structure of said plurality of ring-shaped structures or of an innermost ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures and a sum of said surface area of said innermost ring-shaped structure of said plurality of ring-shaped structures or said innermost ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures of said plurality of ring-shaped diffusing structures
  • each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being in a range of 0.6 mm to 0.7 mm;
  • each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being in a range of 0.5 mm to 0.6 mm;
  • each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being lower than 0.5 mm;
  • said spectacle lens being characterized in comprising at least one feature of the following group of features outside said central zone:
  • a ring-shaped diffractive structure not being an innermost ring-shaped diffractive structure
  • ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power, a ring-shaped structure having a variable surface power not being an innermost ring-shaped structure having a variable surface power,
  • ring-shaped structure having a variable width or more ring-shaped structures each having a variable width a ring-shaped structure having a variable width not being an innermost ring-shaped structure having a variable width
  • a ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width, a ring-shaped diffusing structure having a variable width not being an innermost ring-shaped diffusing structure having a variable width.
  • the spectacle lens according to the invention comprises a central zone having a central zone width within a range of 6 mm to 9.4 mm, and at least one of
  • each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures having a respective uniform width, said uniform width being equal to or lower than 0.7 mm, each ring-shaped structure of said plurality of ring-shaped structures having a surface power which is different to a surface power of a lens surface of said spectacle lens comprising said plurality of ringshaped structures outside a domain occupied by each ring-shaped structure of said plurality of ringshaped structures, said spectacle lens being characterized in comprising at least one feature of the following group of features outside said central zone:
  • each ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures having a uniform width equal to or lower than 0.7 mm
  • each ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power
  • one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width, and in having a surface-based fill factor defined as a surface area ratio of a surface area of an innermost structure, said innermost structure being ring-shaped, said innermost structure being selected from one of the group consisting of a ring-shaped structure of said plurality of ring-shaped structures, a ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures, a ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures, a ring-shaped structure having said variable surface power of said one ring-shaped structure having said variable surface power or said more ring-shaped structures each having said variable surface power, a ring-shaped structure having said variable width of said one ring-shaped structure having said variable width or said more ring-shaped structures each having said variable width, and a ring-shaped diffusing structure having said variable width of said one ring-shaped diffusing
  • each structure being ring-shaped, each structure being selected from at least one of the group consisting of said ring-shaped structure, said ring-shaped diffusing structure, said ring-shaped diffractive structure, said ring-shaped structure having said variable surface power, or said surface-based fill factor being at least one of
  • variable width of each structure varying in a range of 0.6 mm to 0.7 mm
  • variable width of each structure varying in a range of 0.5 mm to 0.6 mm
  • each structure being ring-shaped, each structure being selected from at least one of the group consisting of said ring-shaped structure having said variable width and said ring-shaped diffusing structure having said variable width.
  • the spectacle lens is characterized in that the surfacebased fill factor is at least one of
  • each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being in a range of 0.6 mm to 0.7 mm;
  • each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being in a range of 0.5 mm to 0.6 mm;
  • each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being lower than 0.5 mm;
  • the spectacle lens according to the invention comprises a central zone having a central zone width within a range of 6 mm to 9.4 mm, and at least one of
  • each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures having a respective uniform width, said uniform width, each ring-shaped structure of said plurality of ring-shaped structures having a surface power which is different to a surface power of a lens surface of said spectacle lens comprising said plurality of ringshaped structures outside a domain occupied by each ring-shaped structure of said plurality of ringshaped structures, said spectacle lens being characterized in comprising at least one feature of the following group of features outside said central zone:
  • ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width.
  • a “spectacle lens” is as defined in ISO 13666:2019(E), section 3.5.2, an ophthalmic lens (3.5.1) worn in front of, but not in contact with, the eyeball.
  • a front surface of the spectacle lens is defined as in ISO 13666:2019(E), section 3.2.13, as surface of the spectacle lens intended to be fitted away from the eye.
  • a back surface of the spectacle lens is defined as in ISO 13666:2019(E), section 3.2.14, as surface of the spectacle lens intended to be fitted nearer to the eye.
  • the spectacle lens preferably is a finished spectacle lens, the finished spectacle lens as defined in ISO 13666:2019(E), section 3.8.7 (finished lens), as lens (3.5.2) of which both sides have their final optical surface.
  • the finished spectacle lens may be either an uncut spectacle lens as defined in ISO 13666:2019(E), section 3.8.8 (uncut lens) or an edged spectacle lens as defined in
  • the spectacle lens preferably is selected from at least one of
  • the spectacle lens further preferably is selected from at least one of a single-vision spectacle lens and a position-specific single-vision spectacle lens.
  • the spectacle lens comprises or is based on an optical material.
  • the optical material is as defined in ISO 13666:2019(E), section 3.3.1 , a transparent material capable of being manufactured into optical components.
  • the optical material preferably comprises a thermosetting hard resin as defined in ISO 13666:2019(E), section 3.3.3, or a thermoplastic hard resin as defined in ISO 13666:2019(E), section 3.3.4.
  • the optical material may additionally or alternatively comprise a glass as defined in ISO 13666:2019(E), section 3.3.2.
  • the optical material preferably is having a uniform refractive index.
  • a structure shall be considered as “ring-shaped” if it surrounds a structure-free zone and there is a path within the structure which runs from a starting point within the structure around the structure-free zone and to the starting point again.
  • Ring-shaped may comprise circular, elliptical or otherwise curved rings encircling a domain of a lens surface, i.e., a front surface or a back surface, of a spectacle lens.
  • a domain encircled by one ring-shaped structure, or a domain encircled by a ring-shaped structure out of more or a plurality of ring-shaped structures preferably comprises directly adjacent to said ringshaped structure no further structure.
  • a domain encircled by one ring-shaped diffusing structure, or a domain encircled by a ring-shaped diffusing structure out of more or a plurality of ring-shaped diffusing structures preferably comprises directly adjacent to said ring-shaped diffusing structure no further structure.
  • a domain encircled by one ring-shaped diffractive structure, or a domain encircled by a ringshaped diffractive structure out of more ring-shaped diffractive structures preferably comprises directly adjacent to said (one) ring-shaped diffractive structure no further structure.
  • a domain encircled by one ring-shaped structure having a variable surface power, or a domain encircled by a ring-shaped structure having a variable surface power out of more ring-shaped structures each having a variable surface power preferably comprises directly adjacent to said (one) ring-shaped structure having a variable surface power no further structure.
  • a domain encircled by one ring-shaped structure having a variable width, or a domain encircled by a ring-shaped structure having a variable width out of more ring-shaped structures each having a variable width preferably comprises directly adjacent to said (one) ring-shaped structure having a variable width no further structure.
  • a domain encircled by one ring-shaped diffusing structure having a variable width, or a domain encircled by a ring-shaped diffusing structure having a variable width out of more ring-shaped diffusing structures each having a variable width preferably comprises directly adjacent to said (one) ring-shaped diffusing structure having a variable width no further structure.
  • a structure-free domain of a structure is a domain of the spectacle lens or of the lens surface outside a respective domain occupied by each structure encircled or surrounded by said structure, said structure being selected from the group consisting of a ring-shaped structure of said plurality of ring-shaped structures, a ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures, a ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures, a ring-shaped structure having said variable surface power of said one ring-shaped structure having said variable surface power or said more ringshaped structures each having said variable surface power, a ring-shaped structure having said variable width of said one ring-shaped structure having said variable width or said more ring-shaped structures each having said variable width, and a ring-shaped diffusing structure having said variable width of said one ring-shaped diffusing structure having said variable width or said more ring-shaped diffusing structures each having said variable width.
  • a structure-free domain of the spectacle lens is a domain of the spectacle lens or of the lens surface outside a respective domain occupied by each structure, said structure being ring-shaped, said structure being selected from the before-mentioned group.
  • a surface of the ring-shaped structure of the spectacle lens may be selected from at least one of the following surfaces or may be pieced together from parts of at least one of the following surfaces:
  • the ring-shaped structure of the spectacle lens has a surface power which is different to a surface power of a lens surface of the spectacle lens comprising the ring-shaped structure outside a domain occupied by the ring-shaped structure.
  • the surface power of the ring-shaped structure is defined as in ISO 13666:2019(E), section 3.10.4 (surface power), as a local ability of a surface of the ring-shaped structure to change the vergence of a bundle of rays incident at the surface.
  • the surface power of the ring-shaped structure preferably is as in note 1 to the entry in ISO 13666:2019(E), section 3.10.4, determined from a radius or radii of the surface of the ring-shaped structure and a refractive index (3.1.5) of a material of the ring-shaped structure, and is calculated for light (3.1.2) incident or emergent in air.
  • the refractive index may be an actual refractive index of the material of the ring-shaped structure or a nominal value.
  • the refractive index of the material of the ring-shaped structure preferably is assumed to be a same as a refractive index of an optical material of a spectacle lens.
  • the surface power of a lens surface of the spectacle lens is defined as in ISO 13666:2019(E), section 3.10.4, as a local ability of a finished surface of a spectacle lens to change the vergence of a bundle of rays incident at the finished surface.
  • the surface power of the lens surface is as in note 1 to the entry in ISO 13666:2019(E), section 3.10.4, determined from a radius or radii of the finished surface of the spectacle lens and a refractive index (3.1 .5) of an optical material (3.3.1) of the spectacle lens, and is calculated for light (3.1.2) incident or emergent in air.
  • the refractive index may be an actual refractive index of the optical material or a nominal value.
  • Each surface of a ring-shaped structure of a plurality of ring-shaped structures or each surface of a ring-shaped structure of more ring-shaped structures of the spectacle lens each may be selected from at least one of the following surfaces or may be pieced together from parts of at least one of the following surfaces:
  • Each surface of a ring-shaped structure of the more ring-shaped structures or each surface of a ringshaped structure of the plurality of ring-shaped structures of the spectacle lens each may be selected from a same surface, e.g., a same surface of the before mentioned, or may be pieced together from parts of a same surface, e.g., parts of a same surface of the before mentioned.
  • each surface of a ring-shaped structure of the more ring-shaped structures or each surface of a ring-shaped structure of the plurality of ring-shaped structures of the spectacle lens may be different to one another, e.g., said different surfaces may be selected from the before mentioned, or may be pieced together from parts of different surfaces, e.g., parts of different surfaces of the before mentioned.
  • At least one surface of the more ring-shaped structures or the plurality of ring-shaped structures of the spectacle lens may be different to other surfaces of the more ring-shaped structures or to other surfaces of the plurality of ring-shaped structures, e.g., each of said surface may be selected from the before mentioned ones or pieced together from parts of the before mentioned ones such that at least one surface is different from the other surfaces of the more or the plurality of ringshaped structures.
  • Each ring-shaped structure of the more or the plurality of ring-shaped structures of the spectacle lens has a surface power which is different to a surface power of a lens surface of the spectacle lens comprising the more or the plurality of ring-shaped structures outside each domain occupied by each ring-shaped structure of said more or said plurality of ring-shaped structures.
  • the surface power of each ring-shaped structure of the more or the plurality of ring-shaped structures is defined as in ISO 13666:2019(E), section 3.10.4 (surface power), as a local ability of each surface of a ring-shaped structure of the more or the plurality of ring-shaped structures to change the vergence of a bundle of rays incident at each surface.
  • the surface power of each ring-shaped structure of the more or the plurality of the ring-shaped structures preferably is as in note 1 to the entry in ISO 13666:2019(E), section 3.10.4, determined from a radius or radii of each surface of a ring-shaped shaped structure of the more or the plurality of ring-shaped structures and a refractive index (3.1.5) of a material of each ring-shaped structure of the more or the plurality of ring-shaped structures, and is calculated for light (3.1 .2) incident or emergent in air.
  • the refractive index may be an actual refractive index of the material of each ring-shaped structure of the more or the plurality of ring-shaped structures or a nominal value.
  • the refractive index of the material of each ring-shaped structure of the more or the plurality of ring-shaped structures preferably is assumed to be a same as a refractive index of an optical material of a spectacle lens.
  • the surface power of a lens surface of the spectacle lens is defined as in ISO 13666:2019(E), section 3.10.4 (surface power).
  • a “ring-shaped diffusing structure of a spectacle lens” constitute an optical element that is made of any material that diffuses or scatters light in some manner to transmit soft light. Diffuse light can be easily obtained by reflecting light from a white surface, while more compact diffusing structures may use translucent material, including ground glass, Teflon, holographs, opal glass, and greyed glass.
  • a ringshaped diffusing structure may be regarded as a ring-shaped light modulating cell, preferably within a lens surface of said spectacle lens, said light modulating cell diffusing light as disclosed for example in WO 2020/261213 A1 or as one ring-shaped scattering centre, preferably within a lens surface of said spectacle lens, said scattering centre as disclosed for example in WO 2020/180817 A1 or in WO 2022/251713 A1.
  • a “lens surface of the spectacle lens” is either the front surface or the back surface of the spectacle lens.
  • the lens surface is as defined in ISO 13666:2019(E), section 3.4 and may be formed as one of the following surfaces:
  • a uniform width of one ring-shaped structure or of one ring-shaped diffusing structure designates an expansion of said one ring-shaped structure or said one ring-shaped diffusing structure along a direction perpendicular to its circumferential direction as determined between onsets of said one ringshaped structure or of said one ring-shaped diffusing structure.
  • An onset of one ring-shaped structure represents an inner onset (io), i.e., a first position and an outer onset (oo), i.e., a last position in which a surface of said one ring-shaped structure deviates from a surface, preferably in the sense of surface shape, form or topography, of a lens surface of a digital twin of spectacle lens or of a lens surface of a spectacle lens, each comprising said one ring-shaped structure along the direction of the uniform width of said ring-shaped structure.
  • io inner onset
  • oo outer onset
  • An onset of one ring-shaped diffusing structure represents an inner onset, i.e., a first position, and an outer onset, i.e., a last position, in which said one ring-shaped diffusing structure changes a calculated transmission of a digital twin of a spectacle lens or a transmission of a spectacle lens along the direction of the uniform width of said ring-shaped diffusing structure.
  • an inner onset is an onset that preferably is closer to a central zone and an outer onset preferably is further away from a central zone.
  • a uniform width of one ring-shaped structure or of one ring-shaped diffusing structure may alternatively comprise that in each tangential direction an expansion of said one ring-shaped structure or said one ring-shaped diffusing structure limited by a respective inner onset and a respective outer onset is of a same or uniform width.
  • a tangential direction shall be any direction from an optical centre or a fitting point of the digital twin of a spectacle lens or of a spectacle lens radially outwards.
  • the optical centre of a digital twin of a spectacle lens is defined analogously as in ISO 13666:2019(E), section 3.2.15, as an intersection of the optical axis with the front surface of the digital twin.
  • the optical centre of a spectacle lens is as defined in ISO 13666:2019(E), section 3.2.15, an intersection of the optical axis (3.1 .8) with the front surface (3.2.13) of a spectacle lens (3.5.2).
  • the fitting point of a digital twin of a spectacle lens is defined analogously as in ISO 13666:2019(E), section 3.2.34, as a point on the front surface of the digital twin to be stipulated by the manufacturer for virtually positioning the digital twin in front of an eye.
  • the fitting point of a spectacle lens is as defined in
  • a “uniform width of each ring-shaped structure of a plurality of ring-shaped structures or of a plurality of ring-shaped diffusing structures” or a uniform width of each ring-shaped structure of more ringshaped structures or of more ring-shaped diffusing structures each designates an expansion of each ring-shaped structure of said more or said plurality of ring-shaped structures or of each ring-shaped diffusing structure of said more or said plurality of ring-shaped diffusing structures each along a direction perpendicular to their respective circumferential direction as determined between respective onsets of each ring-shaped structure of said more or said plurality of ring-shaped structures or of each ring-shaped diffusing structure of said more or said plurality of ring-shaped diffusing structures.
  • a respective onset of each ring-shaped structure of said more or said plurality of ring-shaped structures represents each inner onset of each ring-shaped structure of said more or said plurality of ring-shaped structures, i.e., each first position and each outer onset of each ring-shaped structure of said more or said plurality of ring-shaped structures, i.e., each last position in which a surface of a respective ringshaped structure deviates from a surface, each preferably in the sense of surface shape, form or topography, of a lens surface of a digital twin of a spectacle lens or a spectacle lens, each comprising said more or said plurality of ring-shaped structures, along the direction of the respective uniform widths of said more or said plurality of ring-shaped structures.
  • a respective onset of each ring-shaped diffusing structure of said more or said plurality of ring-shaped diffusing structures represents each inner onset, i.e., each first position, and each outer onset, i.e., each last position, in which each ringshaped diffusing structure of said more or said plurality of ring-shaped diffusing structures changes a calculated transmission of digital twin of a spectacle lens or a transmission of a spectacle lens, along the direction of the respective uniform widths of said more or the plurality of ring-shaped diffusing structures.
  • a uniform width of each ring-shaped structure of said more or said plurality of ring-shaped structures or of each ring-shaped diffusing structure of said more or said plurality of ring-shaped diffusing structures may alternatively comprise that in each tangential direction an expansion of each ringshaped structure of said more or said plurality of ring-shaped structures or each ring-shaped diffusing structure of said more or said plurality of ring-shaped diffusing structures each limited by a respective inner onset and a respective outer onset is of a same or uniform width.
  • a tangential direction shall be any direction from an optical centre or a fitting point of the digital twin of the spectacle lens or the spectacle lens radially outwards.
  • a “central zone” is a domain of a lens surface, i.e., a front surface and/or a back surface, of a digital twin of a spectacle lens or a spectacle lens not comprising the plurality of ring-shaped structures or not comprising the plurality of ring-shaped diffusing structures.
  • An innermost ring-shaped structure of said plurality of ring-shaped structures is or may be adjacent to said central zone, thereby encircling said central zone.
  • an innermost of said plurality of ring-shaped diffusing structures is or may be adjacent to said central zone, thereby encircling said central zone.
  • said central zone comprise at least one of an optical centre and a fitting point of the digital twin of the spectacle lens or the spectacle lens.
  • the central zone is the domain of the lens surface of the digital twin of the spectacle lens or the spectacle lens not comprising:
  • ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width.
  • An innermost ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures may be adjacent to said central zone, thereby encircling said central zone.
  • An innermost ring-shaped structure having a variable surface power of said one ring- shaped structure having said variable surface power or said more ring-shaped structures each having said variable surface power may be adjacent to said central zone, thereby encircling said central zone.
  • An innermost ring-shaped structure having a variable width of said one ring-shaped structure having said variable width or said more ring-shaped structures each having said variable width may be adjacent to said central zone, thereby encircling said central zone.
  • An innermost ring-shaped diffusing structure having a variable width of said one ring-shaped diffusing structure having said variable width or said more ring-shaped diffusing structures each having said variable width may be adjacent to said central zone, thereby encircling said central zone.
  • a “central zone width” is a maximum expansion of a domain of said central zone on a lens surface of a digital twin of a spectacle lens or a spectacle lens, i.e., a respective front surface and/or a respective back surface thereof, said domain is or may be limited by two inner onsets of an innermost ringshaped structure of more or the plurality of ring-shaped structures in opposite tangential directions or by two inner onsets of an innermost ring-shaped diffusing structure of more or the plurality of ringshaped diffusing structures in opposite tangential directions.
  • the central zone width is a maximum expansion of the domain of said central zone on the lens surface of a digital twin of a spectacle lens or a spectacle lens, said domain may be limited by two inner onsets of:
  • a central zone width may be a maximum expansion of a domain of said central zone on a lens surface of a digital twin of a spectacle lens or a spectacle lens, i.e., a respective front surface and/or a respective back surface thereof, limited by the respective before mentioned two inner onsets along each line through an optical centre or a fitting point of the spectacle lens.
  • a central zone with a central zone width within a range of 6 mm to 9.4 mm has the advantage that a small central zone, e.g., 6 mm increases the probable efficacy of the spectacle lens for the reduction of progression of myopia for the wearer. At the same time said small central zone decreases the acceptance of the spectacle lens by the wearer due to the decreased comfort of wearability of the spectacle lens.
  • a large central zone, e.g., 9.4 mm decreases the probable efficacy of the spectacle lens for the reduction of progression of myopia for the wearer. At the same time said large central zone increases the acceptance of the spectacle lens by the wearer due to the increased comfort of wearability of the spectacle lens.
  • a “surface-based fill factor” is or may be determined by a surface area ratio of a surface area of an innermost ring-shaped structure of more or the plurality of ring-shaped structures and a sum of said surface area of said innermost ring-shaped structure of said more or said plurality of ring-shaped structures and a surface area of a peripheral zone.
  • a “surface-based fill factor” is or may be determined by a surface area ratio of a surface area of an innermost ring-shaped diffusing structure of more or the plurality of ring-shaped diffusing structures and a sum of said surface area of said innermost ring-shaped diffusing structure of said more or said plurality of ring-shaped diffusing structures and a surface area of a peripheral zone.
  • the surface-based fill factor is or may be defined as a surface area ratio of a surface area of an innermost structure, said innermost structure being ring-shaped, said innermost structure being selected from one of the group consisting of a ring-shaped structure of said plurality of ring-shaped structures, a ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures, a ringshaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures, a ring-shaped structure having said variable surface power of said one ringshaped structure having said variable surface power or said more ring-shaped structures each having said variable surface power, a ring-shaped structure having said variable width of said one ringshaped structure having said variable width or said more ring-shaped structures each having said variable width, and a ring-shaped diffusing structure having said variable width of said one ringshaped diffusing structure having said variable width or said more ring-shaped diffusing structures each having said variable width, and a sum of said surface area of said innermost
  • the surface-based fill factor is or may be defined as one of the following: i) a surface area ratio of a surface area of an innermost ring-shaped structure of said plurality of ringshaped structures and a sum of said surface area of said innermost ring-shaped structure of said plurality of ring-shaped structures and a surface area of a peripheral zone, ii) a surface area ratio of a surface area of an innermost ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures and a sum of said surface area of said innermost ringshaped diffusing structure of said plurality of ring-shaped diffusing structures and a surface area of a peripheral zone, iii) a surface area ratio of a surface area of an innermost ring-shaped diffractive structure of said more ring-shaped diffractive structures and a sum of said surface area of said innermost ring-shaped diffractive structure of said more ring-shaped diffractive structures and a surface area of a peripheral zone, iv) a surface area ratio of
  • a peripheral zone is additionally to a central zone a further domain of the respective lens surface, not comprising one or more ring-shaped structure(s) or not comprising one or more ring-shaped diffusing structure(s).
  • Said one ring-shaped structure or said one ring-shaped diffusing structure each is separating said central zone from said peripheral zone.
  • said peripheral zone expands from an outer onset line of said one ring-shaped structure or from an outer onset line of said ring-shaped diffusing structure to an edge of said lens surface.
  • the respective outer onset line passes along each outer onset of said one ring-shaped structure or each outer onset of said one ring-shaped diffusing structure, the respective outer onset line is thereby surrounded or encircled by said peripheral zone.
  • an inner onset line is an onset line that preferably is closer to a central zone and an outer onset line preferably is further away from a central zone.
  • one ring-shaped diffractive structure having a variable surface power, one ring-shaped structure having a variable width and one ring-shaped diffusing structure having a variable width
  • one ring-shaped structure having a variable surface power having a variable surface power
  • one ring-shaped structure having a variable width having a variable width
  • one ring-shaped diffusing structure having a variable width shall apply analogously.
  • a “peripheral zone” of a lens surface of a spectacle lens or a digital twin of a spectacle lens, i.e., a respective front surface and/or a respective back surface thereof, comprising more or a plurality of ring-shaped structures or more or a plurality of ring-shaped diffusing structures, is additionally to a central zone a further domain of the respective lens surface, not comprising a ring-shaped structure or not comprising a ring-shaped diffusing structures.
  • the peripheral zone is the further domain not comprising a ring-shaped structures or not comprising a ring-shaped diffusing structures closest to a central zone and separated from the central zone by an innermost ring-shaped structure of said more or said plurality of ring-shaped structures or separated from the central zone by an innermost ringshaped diffusing structure of said more or said plurality of ring-shaped diffusing structures.
  • said lens surface of said digital twin of said spectacle lens or of said spectacle lens comprises said more or said plurality of ring-shaped structures said peripheral zone expands from an outer onset line of said innermost ring-shaped structure to an inner onset line of a closest neighbouring ring-shaped structure of said more or said plurality of ring-shaped structures.
  • said peripheral zone expands from an outer onset line of said innermost ring-shaped structure to an inner onset line of a closest neighbouring ring-shaped diffusing structure of said more or said plurality of ring-shaped diffusing structures.
  • the respective outer onset line passes along each outer onset of said innermost ring-shaped structure or each outer onset of said innermost ring-shaped diffusing structure, the respective outer onset line is thereby surrounded by said peripheral zone.
  • the respective inner onset line passes along each inner onset of said closest neighbouring ring-shaped structure or each inner onset of said closest neighbouring ring-shaped diffusing structure, the respective inner onset line thereby limiting an expansion of said peripheral zone.
  • an innermost ring-shaped structure is closest neighbouring a ring-shaped diffusing-structure, optionally of said more or said plurality of ring-shaped diffusing structures, or in case an innermost ring-shaped diffusing structure, optionally of said more or said plurality of ring-shaped diffusing structures, is closest neighbouring a ring-shaped structure, optionally of said more or said plurality of ring-shaped structures, the before given definition for a peripheral zone in case of more or said plurality of ring-shaped structures or more or said plurality of ring-shaped diffusing structures shall apply analogously.
  • the peripheral zone of the lens surface of the digital twin of the spectacle lens or the spectacle lens comprising a) at least one of the plurality of ring-shaped structure and the plurality of ring-shaped diffusing structure and b) at least one of: one ring-shaped diffractive structure or more ring-shaped diffractive structures, one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power, one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width, one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width, is defined with respect to a respective innermost structure and a respective closest neighbouring structure.
  • Said respective innermost structure and said respective closest neighbouring structure both are ring-shaped structures.
  • a respective outer onset line of said respective innermost structure passes along each outer onset of said innermost structure, the respective outer onset line is thereby surrounded by said peripheral zone.
  • a respective inner onset line of said respective closest neighbouring structure passes along each inner onset of said respective closest neighbouring ringshaped structure, the respective inner onset line thereby limiting an expansion of said peripheral zone.
  • At least one of the group consisting of said innermost ring-shaped structure, said innermost ring-shaped diffusing structure, said closest neighbouring ring-shaped structure, and said closest neighbouring ring-shaped diffusing structure is at least one selected from the group consisting of or is replaced by at least one selected from the group consisting of one ring-shaped diffractive structure, one ring-shaped structure having a variable surface power, one ring-shaped structure having a variable width and one ring-shaped diffusing structure having a variable width the before given definition of a peripheral zone in case of more or said plurality of ring-shaped structures or more or said plurality of ring-shaped diffusing structures shall apply analogously.
  • a surface area of one ring-shaped structure or of an innermost ring-shaped structure of more or a plurality of ring-shaped structures is determined by an inner onset line and an outer onset line of said one ring-shaped structure or said innermost ring-shaped structure.
  • the surface area of one ringshaped diffusing structure or of an innermost ring-shaped diffusing structure of more or a plurality of ring-shaped diffusing structures is determined by an inner onset line and an outer onset line of said one ring-shaped diffusing structure or said innermost ring-shaped diffusing structure.
  • the inner onset line passes along each inner onset of said one ring-shaped structure or said innermost ring-shaped structure, the inner onset line of said innermost ring-shaped structure is thereby surrounding or encircling a central zone.
  • the inner onset line passes along each inner onset of said one ring-shaped diffusing structure or said innermost ring-shaped diffusing structure, the inner onset line of said innermost ring-shaped diffusing structure is thereby surrounding or encircling a central zone.
  • the outer onset line passes along each outer onset of said one ring-shaped structure or said innermost ring-shaped structure, the outer onset line is thereby surrounded or encircled by a peripheral zone.
  • the outer onset line passes along each outer onset of said one ring-shaped diffusing structure or said innermost ring-shaped diffusing structure, the outer onset line is thereby surrounded or encircled by a peripheral zone.
  • the respective inner onset line and the respective outer onset line of said one ringshaped structure or said innermost ring-shaped structure or the respective inner onset line and the respective outer onset line of said one ring-shaped diffusing structure or said innermost ring-shaped diffusing structure each are enclosing a surface area along a lens surface, i.e., a front surface and/or back surface, of a digital twin of a spectacle lens or a spectacle lens, without structure(s), said surface area is the surface area of said one ring-shaped structure or said innermost ring-shaped structure of said more or said plurality of ring-shaped structures or is the surface area of said one ring-shaped diffusing structure or said innermost ring-shaped diffusing structure of said more or said plurality of ring-shaped diffusing structures.
  • said one ring-shaped structure, said one ring-shaped diffusing structure, said innermost ring-shaped structure, and said innermost ring-shaped diffusing structure is or is replaced by at least one selected from the group consisting of one ring-shaped diffractive structure, one ringshaped structure having a variable surface power, one ring-shaped structure having a variable width and one ring-shaped diffusing structure having a variable width the before given definition of a respective surface area shall apply analogously.
  • a “surface area of a peripheral zone” of a lens surface of a spectacle lens or a digital twin of a spectacle lens, i.e., a respective front surface and/or back surface thereof, each comprising more or a plurality of ring-shaped structures is determined by an outer onset line of an innermost ring-shaped structure of said more or said plurality of ring-shaped structures and an inner onset line of a closest neighbouring ring-shaped structure of said more or said plurality of ring-shaped structures, a lens surface of a digital twin of a spectacle lens or
  • a “surface area of a peripheral zone” of a lens surface of a spectacle lens, i.e., a respective front surface and/or back surface thereof, each comprising more or a plurality of ring-shaped diffusing structures is determined by an outer onset line of an innermost ring-shaped diffusing structure of said more or said plurality of ring-shaped diffusing structures and an inner onset line of a closest neighbouring ring-shaped diffusing structure of said more
  • Said inner onset line of said closest neighbouring ring-shaped structure or said inner onset line of said closest neighbouring ring-shaped diffusing structure each passes along each inner onset of said closest neighbouring ring-shaped structure or said closest ringshaped diffusing structure, said respective inner onset line thereby surrounding and encircling the peripheral zone.
  • the outer onset line of said innermost ring-shaped structure and the inner onset line of said closest neighbouring ring-shaped structure are enclosing a surface area along a lens surface of a digital twin of a spectacle lens or along a lens surface of a spectacle lens, each comprising said more or said plurality of ring-shaped structures, said surface area is the surface area of the peripheral zone.
  • the outer onset line of said innermost ring-shaped diffusing structure and the inner onset line of said closest neighbouring ring-shaped diffusing structure are enclosing a surface area along a lens surface of a digital twin of a spectacle lens or along a lens surface of a spectacle lens, each comprising said more or said plurality of ring-shaped diffusing structures, said surface area is the surface area of the peripheral zone.
  • a surface area of a peripheral zone is determined by an outer onset line of the innermost ring-shaped structure and an inner onset line of a closest neighbouring ring-shaped diffusing structure.
  • the outer onset line of said innermost ring-shaped structure and the inner onset line of said closest neighbouring ring-shaped diffusing structure are enclosing a surface area along a lens surface of a digital twin of a spectacle lens or along a lens surface a spectacle lens, each comprising said ring-shaped structure and said ring-shaped diffusing structure, said surface area is the surface area of the peripheral zone.
  • a surface area of a peripheral zone is determined by an outer onset line of the innermost ring-shaped diffusing structure and an outer onset line of a closest neighbouring ring-shaped structure.
  • the outer onset line of said innermost ring-shaped diffusing structure and the inner onset line of said closest neighbouring ring-shaped structure are enclosing a surface area along a lens surface of a digital twin of a spectacle lens or along a lens surface of a spectacle lens, each comprising said ring-shaped diffusing structure and said ring-shaped structure, said surface area is the surface area of the peripheral zone.
  • the before given definition of a peripheral zone shall apply analogously when an innermost ring-shaped structure or an innermost ring-shaped diffusing structure is closest neighboured by a structure selected from one of
  • one innermost ring-shaped diffusing structure having a variable width is closest neighboured by a structure selected from one of
  • the surface-based fill-factor has the advantage to define a balance between wearability and manufacturing of a spectacle lens comprising at least two selected from the group consisting of said ring-shaped structure ⁇ ), said ring-shaped diffusing structure(s), said ring-shaped diffractive structure(s), said ring-shaped structure(s) having a variable surface power, said ring-shaped structure ⁇ ) having a variable width, said ring-shaped diffusing structure(s) having a variable width.
  • a surface-based fill factor greater than 59.2% results in a decrease of comfortable wearability of the spectacle lens but increases the probable efficacy of the spectacle lens for the reduction of progression of myopia for the wearer.
  • a surface-based fill factor smaller than 56.1 % results in a decrease of the probable efficacy of the spectacle lens for the reduction of progression of myopia for the wearer but increases the comfortable wearability of the spectacle lens.
  • a well-defined balance between the wearability and the manufacturing of the inventive spectacle lens is achieved with a surface-based fill factor in the range of 34.6-59.2%.
  • a surface-based fill factor of 46.4 to 47.7% is preferred.
  • ‘‘One ring-shaped diffractive structure of a spectacle lens” may have a diffractive surface described for example in EP 3 561 578 A1 , paragraphs [0177] to [0180], or in WO 2020/261213 A1 , paragraph [00108],
  • “More ring-shaped diffractive structures of a spectacle lens” comprise more than one ring-shaped diffractive structures as described before.
  • variable surface power of one ring-shaped structure shall mean that the surface power as defined in
  • one ring-shaped structure having a variable surface power shall mean that a surface power of said one ring-shaped structure along a direction perpendicular to a tangential direction is not uniform.
  • variable surface power of each ring-shaped structure of said more ring-shaped structures shall mean that the surface power as defined in ISO 13666:2019(E), section 3.10.4, along a circumferential direction of each ring-shaped structure of said more ring-shaped structures is not uniform.
  • more ringshaped structure having a variable surface power shall mean that a surface power of each ringshaped structure of said more ring-shaped structures along a direction perpendicular to a tangential direction is not uniform.
  • One ring-shaped structure having a variable width on a spectacle lens A “variable width of one ringshaped structure” designates a variable expansion of said one ring-shaped structure along different directions perpendicular to a circumferential direction as determined between onsets, i.e., an inner and an outer onset, of said one ring-shaped structure.
  • An onset of one ring-shaped structure represents an inner onset, i.e., a first position and an outer onset, i.e., a last position in which a surface of said one ring-shaped structure deviates from a surface - surface preferably in the sense of surface shape, form or topography - of a lens surface of a spectacle lens comprising said one ring-shaped structure, along the respective direction of the variable width of said ring-shaped structure.
  • a variable width of one ring-shaped structure may alternatively comprise that in each tangential direction or in different tangential directions an expansion of said one ring-shaped structure limited by an inner onset and an outer onset is of a different width.
  • a tangential direction shall be any direction from an optical centre or a fitting point of a spectacle lens radially outwards.
  • “More ring-shaped structures each having a variable width on a spectacle lens” A “variable width of more ring-shaped structures” designates a variable expansion of each ring-shaped structure of said more ring-shaped structures along a perpendicular direction to their respective circumferential direction as determined between respective onsets, i.e., a respective inner onset and a respective outer onset, of each ring-shaped structure of said more ring-shaped structures.
  • a “respective onset of each of said more ring-shaped structures” represents each inner onset of each ring-shaped structure of said more ring-shaped structures, i.e., each first position, and each outer onset of each ring-shaped structure of said more ring-shaped structures, i.e., each last position in which a surface of each ringshaped structure deviates from a surface, preferably in the sense of surface shape, form or topography, of a lens surface of a spectacle lens, each comprising said more ring-shaped structure, along the direction of the respective variable widths of each ring-shaped structure of said more ringshaped structures.
  • a variable width of each of said more ring-shaped structures may alternatively comprise that in each tangential direction or in different tangential directions an expansion of each ring-shaped structure of said more ring-shaped structure limited by a respective inner onset and a respective outer onset is of a different width.
  • a tangential direction shall be any direction from an optical centre or a fitting point of the spectacle lens radially outwards.
  • One ring-shaped diffusing structure having a variable width on a spectacle lens A “variable width of one ring-shaped diffusing structure” designates a variable expansion of said one ring-shaped diffusing structure along different directions perpendicular to a circumferential direction as determined between onsets, i.e., an inner and an outer onset, of said one ring-shaped diffusing structure.
  • An ’’onset of one ring-shaped diffusing structure represents an inner onset, i.e., a first position and an outer onset, i.e., a last position in which said one ring-shaped diffusing structure changes a transmission of a spectacle lens along the respective direction of the variable width of said ring-shaped diffusing structure.
  • a variable width of one ring-shaped diffusing structure may alternatively comprise that in each tangential direction or in different tangential directions an expansion of said one ring-shaped diffusing structure limited by an inner onset and an outer onset is of a different width.
  • a tangential direction shall be any direction from an optical centre or a fitting point of a spectacle lens radially outwards.
  • “More ring-shaped diffusing structures each having a variable width on a spectacle lens” A “variable width of more ring-shaped diffusing structures” designates a variable expansion of each ring-shaped diffusing structure of said more ring-shaped diffusing structures along a perpendicular direction to their respective circumferential direction as determined between respective onsets, i.e., a respective inner onset and a respective outer onset, of each ring-shaped diffusing structure of said more ring-shaped structures.
  • a “respective onset of each of said more ring-shaped diffusing structures” represents each inner onset of each ring-shaped diffusing structure of said more ring-shaped diffusing structures, i.e., each first position, and each outer onset of each ring-shaped diffusing structure of said more ringshaped diffusing structures, i.e., each last position in which said each ring-shaped diffusing structure changes a transmission of a spectacle lens along the respective direction of the variable width of each ring-shaped diffusing structure of said more ring-shaped structures.
  • a variable width of each ringshaped diffusing structure of said more ring-shaped structures may alternatively comprise that in each tangential direction or in different tangential directions an expansion of each ring-shaped diffusing structure of said more ring-shaped diffusing structure limited by a respective inner onset and a respective outer onset is of a different width.
  • a tangential direction shall be any direction from an optical centre or a fitting point of the spectacle lens radially outwards.
  • a key benefit of the spectacle lens described in the foregoing is that the at least one structure selected from a ring-shaped structure, a ring-shaped diffusing structure, a ring-shaped diffractive structure, a ringshaped structure having said variable surface power, a ring-shaped structure having said variable width, and a ring-shaped diffusing structure having said variable width, the at least one structure disrupting a pattern created by at least one of the plurality of ring-shaped structures and the plurality of ring-shaped diffusing structures prevents the wearer from habituation to such a pattern.
  • the spectacle lens is characterized in that a central zone comprises an optical centre or a fitting point of the spectacle lens, the central zone as defined in ISO 13666:2019(E), section 3.2.15, said fitting point as defined in ISO 13666:2019(E), section 3.2.34.
  • the spectacle lens is characterized in that a uniform width of at least one of the group consisting of
  • each ringshaped diffusing structure of said plurality of ring-shaped diffusing structures preferably each ringshaped diffusing structure of said plurality of ring-shaped diffusing structures
  • each ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ringshaped diffractive structures, - each ring-shaped structure having a variable surface power of said one ring-shaped structure having a variable surface power or said more ring-shaped structures each having a variable surface power is within at least one range of the following group of ranges:
  • said uniform width is larger than 0.2 mm and equal to or lower than 0.7 mm;
  • said uniform width is larger than 0.3 mm and equal to or lower than 0.7 mm;
  • said uniform width is equal or lower than 0.6 mm;
  • said uniform width is larger than 0.2 mm and equal to or lower than 0.6 mm;
  • said uniform width is larger than 0.3 mm and equal to or lower than 0.6 mm;
  • said uniform width is equal or lower than 0.5 mm
  • said uniform width is larger than 0.2 mm and equal to or lower than 0.5 mm;
  • said uniform width is larger than 0.3 mm and equal to or lower than 0.5 mm.
  • a uniform width within any one of the before mentioned ranges has the beneficial effect to define a well-defined balance between wearability and manufacturing of a respective spectacle lens.
  • a decrease of the uniform width leads to a more comfortable wearability whereas an increase of the uniform width enables easier manufacturing of the respective spectacle lens.
  • the spectacle lens is characterized in that a central zone width is within at least one range of the following group of ranges:
  • said central zone width (cw110, cw210, cw310, ...) is larger than 6 mm and lower than or equal to 7 mm;
  • said central zone width (cw110, cw210, cw310, ...) is larger than 7 mm and lower than or equal to 9.4 mm.
  • the spectacle lens is characterized in that a difference of a surface power of each ring-shaped structure of said plurality of ring-shaped structures to a surface power of a lens surface comprising said plurality of ring-shaped structures outside a domain occupied by each ring-shaped structure of said plurality of ring-shaped structures, is within at least one range of the following group of ranges:
  • a difference in surface power as in the selected ranges given before has the beneficial effect to further define a balance between wearability and manufacturing of a respective spectacle lens.
  • a difference in surface power between 10 dioptres and 12 dioptres preferably increases the probable efficacy of the respective spectacle lens for a reduction of progression of myopia for a wearer.
  • a difference in surface power between 6 dioptres and 8 dioptres preferably increases a comfortable wearability of a respective spectacle lens.
  • a well-defined balance between wearability and manufacturing of the respective spectacle lens is achieved with a difference in surface power in the range of 6 dioptres to 12 dioptres. Due to the at least one structure different to at least one of the plurality of ring-shaped structures and the plurality of ring-shaped diffusing structures a habituation to such a spectacle lens preferably is prevented simultaneously.
  • the spectacle lens is characterized in that a variable width of at least one of the group consisting of one ring-shaped structure, more ring-shaped structures, preferably each ring-shaped structure of said more ring-shaped structures, one ring-shaped diffusing structure and more ring-shaped diffusing structures, preferably each ring-shaped diffusing structure of said more ring-shaped diffusing structures varies within at least one range of the following group of ranges:
  • variable width varies in a range of larger than 0.2 mm and equal or lower than 0.7 mm;
  • variable width varies in a range of larger than 0.3 mm and equal or lower than 0.7 mm;
  • variable width varies in a range of lower than 0.6 mm
  • variable width varies in a range of larger than 0.2 mm and equal or lower than 0.6 mm;
  • variable width varies in a range of larger than 0.3 mm and equal or lower than 0.6 mm;
  • variable width varies in a range of lower than 0.5 mm
  • variable width varies in a range of larger than 0.2 mm and equal or lower than 0.5 mm;
  • variable width varies in a range of larger than 0.3 mm and equal or lower than 0.5 mm.
  • a variable width within any one of the before mentioned ranges has the beneficial effect to define a well-defined balance between wearability and manufacturing of a respective spectacle lens in each ring-shaped structure having a variable width or in each ring-shaped diffusing structure having a variable width.
  • a decrease of the variable width within each ring-shaped structure or within each ringshaped diffusing structure leads to a more comfortable wearability whereas an increase of the variable width within each ring-shaped structure or within each ring-shaped diffusing structure enables easier manufacturing of the respective spectacle lens.
  • a habituation effect to a spectacle lens comprising a respective structure is assumed to be prevented.
  • the spectacle lens is characterized in that each of one ring-shaped structure having a variable surface power or each ring-shaped structure of more ringshaped structures having a variable surface power has a variable surface power which is different to a surface power of a lens surface comprising said one or more ring-shaped structure(s) each having said variable surface power outside a domain occupied by said one ring-shaped structure or by each ring-shaped structure of said more ring-shaped structures each having said variable surface power, said variable surface power varying within at least one range of the following group of ranges:
  • a difference in surface power varying within one ring-shaped structure having a variable surface power or within each ring-shaped structure of more ring-shaped structures each having a variable surface power as in the selected ranges given before has the beneficial effect to further define a balance between wearability and manufacturing of a respective spectacle lens.
  • a difference in surface power varying between 10 dioptres and 12 dioptres within one ring-shaped structure having a variable surface power or within each ring-shaped structure of more ring-shaped structures each having a variable surface power preferably increases the probable efficacy of the respective spectacle lens for a reduction of progression of myopia for a wearer.
  • a difference in surface power between 6 dioptres and 8 dioptres within one ring-shaped structure having a variable surface power or within each ringshaped structure of more ring-shaped structures each having a variable surface power preferably increases a comfortable wearability of a respective spectacle lens.
  • a well-defined balance between wearability and manufacturing of the respective spectacle lens is achieved with a difference in surface power varying in the range of 6 dioptres to 12 dioptres within one ring-shaped structure having a variable surface power or within each ring-shaped structure of more ring-shaped structures having a variable surface power.
  • the prevention of a habituation effect due to a structure different to at least one of the plurality of ring-shaped structures and the plurality of ring-shaped diffusing structures shall support the efficacy of such a spectacle lens.
  • a computer-implemented method configured for calculating a digital twin of a spectacle lensfor the purpose of a use of said digital twin for manufacturing the spectacle lens, said digital twin comprising at least one of more or a plurality of ring-shaped structures and more or a plurality of ring-shaped diffusing structures, each having a respective uniform width, comprises the steps of
  • a central zone on a lens surface of said digital twin such as to comprise a central zone width within a range of 6 mm to 9.4 mm;
  • a surface-based fill factor defined as a surface area ratio of a surface area of an innermost of said more or said plurality of ring-shaped structures or of an innermost of said more or said plurality of ring-shaped diffusing structures and a sum of said surface area of said innermost ring-shaped structure of said more or said plurality of ring-shaped structures or said innermost ringshaped diffusing structure of said more or said plurality of ring-shaped diffusing structures and a surface area of a peripheral zone, such that said surface-based fill factor is o larger than 17 % and equal to or lower than 70 % for said uniform width of said more or said plurality of ring-shaped structures or said more or said plurality of ring-shaped diffusing structures in a range of 0.6 mm to 0.7 mm, or o larger than 15 % and equal or lower than 60 % for said uniform width of said more or said plurality ring-shaped structures or said more or said plurality of ring-shaped diffusing structures in a range of 0.5 mm to
  • ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width, or adding at least one of
  • the method being configured for calculating by a computer a digital twin of a spectacle lens for the purpose of a use of said digital twin for manufacturing the spectacle lens according to the invention, said digital twin comprising at least one of a plurality of ring-shaped structures and a plurality of ringshaped diffusing structures, each having a respective uniform width, each ring-shaped structure of said plurality of ring-shaped structures having a surface power which is different to a surface power of a lens surface of said spectacle lens comprising said plurality of ringshaped structures outside a domain occupied by each ring-shaped structure of said plurality of ringshaped structures, the method being characterized in the step of a) replacing - each ring-shaped structure of said plurality of ring-shaped structures, or
  • each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures by at least one of
  • each ring-shaped diffusing structure of a subset of ring-shaped diffusing structures of said plurality of ring-shaped diffusing structures by at least one of
  • said plurality of ring-shaped structures or said plurality of ring-shaped diffusing structures while maintaining a surface-based fill factor defined as a surface area ratio of a surface area of an innermost ring-shaped structure of said plurality of ring-shaped structures or of an innermost ringshaped diffusing structure of said plurality of ring-shaped diffusing structures and a sum of said surface area of said innermost ring-shaped structure of said plurality of ring-shaped structures or said innermost ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures and a surface area of a peripheral zone, said innermost ring-shaped structure of said plurality of ring-shaped structures or said innermost ringshaped diffusing structure of said plurality of ring-shaped diffusing structures each being positioned adjacent and along a central zone.
  • a “digital twin of a spectacle lens” shall be defined analogously as in ISO 13666:2019(E), section 3.5.2 (spectacle lens), as a digital twin of an ophthalmic lens worn, when transferred to physical reality, in front of, but not in contact with, the eyeball.
  • the digital twin of the spectacle lens is for the purpose of a use of the digital twin for manufacturing the spectacle lens.
  • the digital twin of a spectacle lens is a mathematical description of a front surface of the spectacle lens, a mathematical description of a back surface of the spectacle lens, said mathematical descriptions including a relative orientation of the front surface and the back surface and a refractive index of an optical material between the front surface and the back surface.
  • a front surface of said digital twin of said spectacle lens is defined analogously as in ISO 13666:2019(E), section 3.2.13, as a surface which when said digital twin is transferred to physical reality is intended to be fitted away from the eye.
  • a back surface of said digital twin of said spectacle lens is defined analogously as in ISO 13666:2019(E), section 3.2.14, as a surface which when said digital twin is transferred to physical reality is intended to be fitted nearer to the eye.
  • the digital twin of said spectacle lens is transferred to physical reality by manufacturing said spectacle lens.
  • the refractive index of the optical material included in the mathematical descriptions preferably is a uniform refractive index.
  • the refractive index of the optical material included in the mathematical descriptions preferably is the refractive index the spectacle lens has when the digital twin of the spectacle lens has been transferred to physical reality.
  • the digital twin of the spectacle lens may, for the purpose of a use of the digital twin for manufacturing the spectacle lens, additionally or alternatively, be one of the following:
  • Said analytical description or said analytical model is for the purpose of a use for manufacturing said spectacle lens.
  • Said analytical description or said analytical model preferably is a piecewise representation and comprises (a) a mathematical formula describing a lens surface of a front surface of said spectacle lens not considering one or more ring-shaped structure(s) or not considering one or more rings-shaped diffusing structure(s), i.e., the mathematical formula describing the front surface of said spectacle lens, (b) a mathematical formula describing a lens surface of a back surface of said spectacle lens not considering one or more ring-shaped structure(s) or not considering one or more rings-shaped diffusing structure(s), i.e., the mathematical formula describing the back surface of said spectacle lens, (c)(i) a piecewise mathematical formula describing one ring-shaped structure or one ring-shaped diffusing structure, in particular a surface, preferably as could be seen in the examples given below in the sense of surface shape, form or topography,
  • said analytical description or said analytical model is a piecewise representation and comprises (a) a mathematical formula or mathematical formulas describing a lens surface of a front surface, i.e., the mathematical formula or the mathematical formulas describing the front surface, considering optionally one ring-shaped structure or one ring-shaped diffusing structure or each ring-shaped structure of more ring-shaped structures or each ring-shaped diffusing structure of more ring-shaped diffusing structures, preferably the mathematical formula(s) describing the lens surface of the front surface inclusive one or more ring-shaped structure(s) or inclusive one or more ring-shaped diffusing structure ⁇ ), (b) a mathematical formula or mathematical formulas describing a lens surface of a back surface, i.e., the mathematical formula or the mathematical formulas describing the back surface, considering optionally one ring-shaped structure or one ring-shaped diffusing structure or each ring-shaped structure of more ring-shaped structures or each ring-shaped diffusing structure of more ring-shaped diffusing structures, preferably the mathematical formula formula describing
  • an analytical description or an analytical model describing or representing said spectacle lens said analytical description or said analytical model additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure(s) or said one or more ring-shaped diffusing structure(s);
  • said analytical description or said analytical model additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure(s) or said one or more ring-shaped diffusing structure(s);
  • said analytical description or said analytical model being (i) computer-readable data or (ii) in the form of computer-readable data, said computer-readable data being for the purpose of a use for manufacturing said spectacle lens;
  • said analytical description or said analytical model being (i) computer-readable data or (ii) in the form of computer-readable data, said computer-readable data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure(s) or said one or more ring-shaped diffusing structure(s);
  • said analytical description or said analytical model being for the purpose of a use for manufacturing said spectacle lens and being (i) stored on a computer-readable storage medium, (ii) embodied in a data signal or (iii) transferred via a data signal.
  • the computer readable storage medium may be a non-transitory tangible computer-readable storage medium;
  • Said numerical data are for the purpose of a use for manufacturing said spectacle lens.
  • Said numerical data preferably are comprising or being a conversion of said analytical description or said analytical model.
  • Said numerical data preferably are comprising a pattern which comprises a) discrete x,y,z positions of or on a front surface of said spectacle lens and b) discrete x,y,z positions of or on a back surface of said spectacle lens.
  • Said pattern comprising discrete x,y positions may be adapted or selected arbitrarily.
  • Said numerical data comprises the function value of the analytical description or the analytical model of said lens surface in each of said discrete x,y positions.
  • each discrete x,y position i.e., the discrete x,y,z positions, of the front and back surface are described in the same coordinate system or a relative orientation of the coordinate systems of the front surface and the back surface is comprised in said numerical data.
  • a refractive index of an optical material is comprised in said numerical data;
  • said numerical data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure(s) or said one or more ring-shaped diffusing structure(s);
  • said numerical data being (i) computer-readable data or (ii) in the form of computer-readable data, said computer-readable data being for the purpose of a use for manufacturing said spectacle lens;
  • said numerical data being (i) computer-readable data or (ii) in the form of computer-readable data, said computer-readable data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure(s) or said one or more ring-shaped diffusing structure(s);
  • the numerical data being for the purpose of a use for manufacturing said spectacle lens and being (i) stored on a computer-readable storage medium, (ii) embodied in a data signal or (iii) transferred via a data signal.
  • the computer-readable storage medium may be a non-transitory tangible computer-readable storage medium;
  • - computer-readable data describing or representing said spectacle lens said computer-readable data being for the purpose of a use for manufacturing said spectacle lens; - computer-readable data describing or representing said spectacle lens, said computer-readable data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure(s) or said one or more ring-shaped diffusing structure(s);
  • said computer-readable data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure(s) or said one or more ring-shaped diffusing structure(s);
  • said computer-readable data being for the purpose of a use for manufacturing said spectacle lens and being (i) stored on a computer-readable storage medium, (ii) embodied in a data signal or (iii) transferred via a data signal.
  • the computer-readable storage medium may be a non-transitory tangible computer-readable storage medium;
  • said computer- readable data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure(s) or said one or more ring-shaped diffusing structure(s);
  • said virtual representation of said spectacle lens being for the purpose of a use for manufacturing said spectacle lens and being (i) stored on a computer-readable storage medium, (ii) embodied in a data signal or (iii) transferred via a data signal.
  • the computer-readable storage medium may be a non-transitory tangible computer-readable storage medium;
  • said virtual representation of said spectacle lens in the form of computer-readable data being for the purpose of manufacturing said spectacle lens and being (i) stored on a computer-readable storage medium, (ii) embodied in a data signal or (iii) transferred via a data signal.
  • the computer-readable storage medium may be a non-transitory tangible computer-readable storage medium.
  • the spectacle lens results from a transfer of a digital twin of a spectacle lens to physical reality.
  • the digital twin of the spectacle lens is transferred to physical reality by manufacturing the spectacle lens.
  • a ring-shaped structure of a digital twin of a spectacle lens is a mathematical description of a surface of a ring-shaped structure, said mathematical description not considering a mathematical description of a lens surface of the digital twin of the spectacle lens comprising the ring-shaped structure, for example not considering a mathematical description of a front surface comprising the ring-shaped structure.
  • a ring-shaped structure of the digital twin of the spectacle lens is a single or same ringshaped structure of said digital twin, preferably out of the plurality of ring-shaped structures.
  • the mathematical description of the lens surface comprising the ring-shaped structure is a separate mathematical description from the mathematical description of the surface of the ring-shaped structure itself.
  • the surface of the ring-shaped structure and the lens surface of the digital twin of the spectacle lens comprising the ring-shaped structure are mathematically described piecewise.
  • the surface of the ring-shaped structure of the digital twin of the spectacle lens may be selected from at least one of the following surfaces or may be pieced together from parts of at least one of the following surfaces:
  • the ring-shaped structure of the digital twin of the spectacle lens has a surface power which is different to a surface power of a lens surface of the digital twin of the spectacle lens comprising the ring-shaped structure outside a domain occupied by the ring-shaped structure.
  • the surface power of the ring-shaped structure shall be defined analogously as in ISO 13666:2019(E), section 3.10.4 (surface power), as a local ability of the surface of the ring-shaped structure to change the calculated vergence of a digitally represented bundle of rays incident at the surface of the ring-shaped structure.
  • the surface power of the ring-shaped structure preferably is analogously as in note 1 to the entry in ISO 13666:2019(E), section 3.10.4, determined from a radius or radii of the surface of the ring-shaped structure and a refractive index of a material of the ring-shaped structure, and is calculated for digitally represented light incident or emergent in air.
  • the refractive index may be an actual refractive index of a material of the ring-shaped structure or a nominal value.
  • the refractive index of the material of the ring-shaped structure preferably is assumed to be a same as a refractive index of an optical material of a digital twin of a spectacle lens.
  • the surface power of a lens surface of the digital twin of the spectacle lens shall be defined analogously as in ISO 13666:2019(E), entry 3.10.4 (surface power), as a local ability of the lens surface of a digital twin of a spectacle lens to change the calculated vergence of a digitally represented bundle of rays incident at the lens surface.
  • the surface power of the lens surface is analogously as in note 1 to the entry in ISO 13666:2019(E), entry 3.10.4, determined from a radius or radii of the lens surface of the digital twin of the spectacle lens and a refractive index of an optical material of the digital twin of the spectacle lens, and is calculated for digitally represented light incident or emergent in air.
  • the refractive index may be an actual refractive index of the optical material of the digital twin of the spectacle lens or a nominal value.
  • a ring-shaped structure of a spectacle lens results from transferring a digital twin of a spectacle lens comprising said ring-shaped structure to physical reality, by manufacturing said spectacle lens.
  • More or “a plurality of ring-shaped structures of a digital twin of a spectacle lens” is a mathematical description of a surface of each ring-shaped structure of said more or said plurality of ring-shaped structures, each mathematical description not considering a mathematical description of a lens surface of the digital twin of the spectacle lens comprising the more or the plurality of ring-shaped structures.
  • the mathematical description of the lens surface comprising the more or the plurality of ring-shaped structures is a separate mathematical description from the mathematical description of each surface of the more or the plurality of ring-shaped structures themselves.
  • Each surface of the more or the plurality of ring-shaped structures and the lens surface of the digital twin of the spectacle lens comprising the more or the plurality of ring-shaped structures are mathematically described piecewise.
  • Each surface of the more orthe plurality of ring-shaped structures of the digital twin of the spectacle lens may be selected from at least one of the following surfaces or may be pieced together from parts of at least one of the following surfaces:
  • the surfaces of the more or the plurality of ring-shaped structures of the digital twin of the spectacle lens each may be selected from a same surface, e.g., a same surface of the before mentioned, or may be pieced together from parts of a same surface, e.g., parts of a same surface of the before mentioned.
  • each surface of the more orthe plurality of ring-shaped structures of the digital twin of the spectacle lens may be different to one another, e.g., said different surfaces may be selected from the before mentioned, or may be pieced together from parts of different surfaces, e.g., parts of different surfaces of the before mentioned.
  • At least one surface of the more or the plurality of ring-shaped structures of the digital twin of the spectacle lens may be different to other surfaces of the more or the plurality of ring-shaped structures, e.g., each of said surfaces may be selected from the before mentioned or pieced together from parts of the before mentioned such that at least one surface is different from the other surfaces of the more or the plurality of ring-shaped structures.
  • Each ring-shaped structure of the more or the plurality of ring-shaped structures of the digital twin of the spectacle lens has a surface power which is different to a surface power of a lens surface of the digital twin of the spectacle lens comprising the more or the plurality of ring-shaped structures outside each domain occupied by each ring-shaped structure of the more or the plurality of ring-shaped structures.
  • each ring-shaped structure of the more or the plurality of ring-shaped structures shall be defined analogously as in ISO 13666:2019(E), section 3.10.4 (surface power), as a local ability of each surface of the more or the plurality of ring-shaped structures to change the calculated vergence of a digitally represented bundle of rays incident at each surface of the more or the plurality of ring-shaped structures.
  • the surface power of the more or the plurality of ring-shaped structures preferably is analogously as in note 1 to the entry in ISO 13666:2019(E), section 3.10.4, determined from a radius or radii of each surface of the more or the plurality of ring-shaped structures and a refractive index of a material of each ring-shaped structure, and is calculated for digitally represented light incident or emergent in air.
  • the refractive index may be an actual refractive index of a material of each ring-shaped structure or a nominal value.
  • the refractive index of the material of each ring-shaped structure preferably is assumed to be a same as a refractive index of an optical material of a digital twin of a spectacle lens.
  • the surface power of a lens surface of the digital twin of the spectacle lens shall be defined analogously as in ISO 13666:2019(E), section 3.10.4 (surface power).
  • More or the plurality of ring-shaped structures of the spectacle lens results from transferring a digital twin of a spectacle lens comprising the more or the pluratliy of ring-shaped structures in physical reality, by manufacturing said spectacle lens.
  • a ring-shaped diffusing structure of a digital twin of a spectacle lens constitute an optical element that is made of any material that diffuses or scatters light in some manner to transmit soft light. Diffuse light can be easily obtained by reflecting light from a white surface, while more compact diffusing structures may use translucent material, including ground glass, Teflon, holographs, opal glass, and greyed glass.
  • a ring-shaped diffusing structure may be regarded as a ring-shaped light modulating cell, preferably within a lens surface of said digital twin, said light modulating cell diffusing light as disclosed for example in WO 2020/261213 A1 or as one ring-shaped scattering centre, preferably within a lens surface of said digital twin, said scattering centre as disclosed for example in WO 2020/180817 A1 or in WO 2022/251713 A1 .
  • a ring-shaped diffusing structure of the spectacle lens results from transferring of a digital twin of a spectacle lens comprising said ring-shaped diffusing structure in physical reality, by manufacturing said spectacle lens.
  • More or ‘‘a plurality of ring-shaped diffusing structures of a digital twin of a spectacle lens” may be regarded as more than one of the before mentioned ring-shaped diffusing structures.
  • More or a plurality of ring-shaped diffusing structures of a spectacle lens result(s) from transferring of a digital twin of a spectacle lens comprising said more or said plurality of ring-shaped diffusing structure in physical reality, by manufacturing said spectacle lens.
  • a ‘‘lens surface of a digital twin of a spectacle lens” is a mathematical description of a front surface of the digital twin of the spectacle lens or a mathematical description of a back surface of the digital twin of the spectacle lens.
  • the mathematical description of the front surface and the mathematical description of the back surface are piecewise mathematical descriptions, not considering a piecewise mathematical description of a ring-shaped structure, a ring-shaped diffusing structure, or of each ringshaped structure of more or a plurality of ring-shaped structures or each ring-shaped diffusing structure of more or a plurality of ring-shaped diffusing structures.
  • the lens surface of the front surface and/or the lens surface of the back surface of the digital twin of the spectacle lens each is as defined in ISO 13666:2019(E), section 3.4 or is defined analogously as in ISO 13666:2019(E), section 3.4.
  • the lens surface may be formed as one of the following:
  • the lens surface of the front surface and the lens surface of the back surface of the digital twin of the spectacle lens may be formed of a same lens surface or of a different lens surface.
  • a lens surface of the spectacle lens results from a transfer of a lens surface of a digital twin of the spectacle lens in physical reality, by manufacturing the spectacle lens.
  • One ring-shaped diffractive structure of a digital twin of a spectacle lens may have a diffractive surface described for example in EP 3 561 578 A1 , paragraphs [0177] to [0180], or in WO 2020/261213 A1 , paragraph [00108],
  • One ring-shaped diffractive structure of the spectacle lens results from transferring a digital twin of a spectacle lens comprising said one ring-shaped diffractive structure in physical reality, by manufacturing said spectacle lens.
  • “More ring-shaped diffractive structures of a digital twin of a spectacle lens” comprise more than one ring-shaped diffractive structures as described before.
  • More ring-shaped diffractive structures of the spectacle lens result from transferring a digital twin of a spectacle lens comprising said more ring-shaped diffractive structures in physical reality, by manufacturing said spectacle lens.
  • One ring-shaped structure having a variable surface power on a digital twin of a spectacle lens shall comprise that a surface power of said one ring-shaped structure, the surface power defined analogously as in ISO 13666:2019(E), section 3.10.4, along a circumferential direction of said one ring-shaped structure is not uniform.
  • one ring-shaped structure having a variable surface power shall mean that a surface power of said one ring-shaped structure along a direction perpendicular to a tangential direction is not uniform.
  • One ring-shaped structure having a variable surface power on a spectacle lens results from transferring a digital twin of a spectacle lens comprising said one ring-shaped structure having a variable surface power in physical reality, by manufacturing said spectacle lens.
  • “More ring-shaped structures each having a variable surface power on a digital twin of a spectacle lens” shall comprise that a surface power of each ring-shaped structure of said more ring-shaped structures, the surface power defined analogously as in ISO 13666:2019(E), section 3.10.4, along a circumferential direction of each ring-shaped structure is not uniform.
  • more ring-shaped structures having a variable surface power shall mean that a surface power of each ring-shaped structure of said more ring-shaped structures along a direction perpendicular to a tangential direction is not uniform.
  • More ring-shaped structures each having a variable surface power on a spectacle lens results from transferring a digital twin of a spectacle lens comprising said more ring-shaped structures each having a variable surface power in physical reality, by manufacturing said spectacle lens.
  • One ring-shaped structure having a variable width on a digital twin of a spectacle lens shall comprise the definition provided before for one ring-shaped structure.
  • a “variable width of one ring-shaped structure” designates a variable expansion of said one ring-shaped structure along different directions perpendicular to a circumferential direction as determined between onsets, i.e., an inner and an outer onset, of said one ring-shaped structure.
  • An onset of one ring-shaped structure represents an inner onset, i.e., a first position and an outer onset, i.e., a last position in which a surface, preferably in the sense of surface shape, form or topography, of said one ring-shaped structure deviates from a surface of a lens surface of a digital twin of a spectacle lens comprising said one ring-shaped structure, along the respective direction of the variable width of said ring-shaped structure.
  • a variable width of one ring-shaped structure may alternatively comprise that in each tangential direction or in different tangential directions an expansion of said one ring-shaped structure limited by an inner onset and an outer onset is of a different width.
  • a tangential direction shall be any direction from an optical centre or a fitting point of the digital twin of a spectacle lens radially outwards.
  • One ring-shaped structure having a variable width on a spectacle lens results from transferring a digital twin of a spectacle lens comprising one ring-shaped structure having a variable width in physical reality, by manufacturing said spectacle lens.
  • the definition given before with respect to one ring-shaped structure of a spectacle lens shall apply accordingly.
  • “More ring-shaped structures each having a variable width on a digital twin of a spectacle lens shall comprise the definition provided before with respect to more ring-shaped structures of a digital twin of a spectacle lens.
  • a “variable width of more ring-shaped structures” designates a variable expansion of each of said more ring-shaped structures along a perpendicular direction to their respective circumferential direction as determined between respective onsets, i.e., a respective inner onset and a respective outer onset, of each ring-shaped structure of said more ring-shaped structures.
  • a “respective onset of each of said more ring-shaped structures” represents each inner onset of each ring-shaped structure of said more ring-shaped structures, i.e., each first position and each outer onset of each ring-shaped structure of said more ring-shaped structures, i.e., each last position in which a surface of said one ring-shaped structure deviates from a surface, surface preferably in the sense of surface shape, form or topography, of a lens surface of a digital twin of a spectacle lens, each comprising said more ring-shaped structure, along the direction of the respective variable widths of each ring-shaped structure of said more ring-shaped structures.
  • a variable width of each ringshaped structure of said more ring-shaped structures may alternatively comprise that in each tangential direction or in different tangential directions an expansion of each ring-shaped structure of said more ring-shaped structures limited by a respective inner onset and a respective outer onset is of a different width.
  • a tangential direction shall be any direction from an optical centre or a fitting point of the digital twin of the spectacle lens radially outwards.
  • More ring-shaped structures each having a variable width on a spectacle lens result from transferring a digital twin of a spectacle lens comprising said more ring-shaped structures each having a variable width in physical reality, by manufacturing said spectacle lens.
  • the definition provided before with respect to more ring-shaped structures of a spectacle lens shall apply accordingly.
  • One ring-shaped diffusing structure having a variable width on a digital twin of a spectacle lens shall comprise the definition provided before for one ring-shaped diffusing structure.
  • a variable width of one ring-shaped diffusing structure designates a variable expansion of said one ring-shaped diffusing structure along different directions perpendicular to a circumferential direction as determined between onsets, i.e., an inner and an outer onset, of said one ring-shaped diffusing structure.
  • An onset of one ring-shaped diffusing structure represents an inner onset, i.e., a first position and an outer onset, i.e., a last position in which said one ring-shaped diffusing structure changes a calculated transmission of a digital twin of a spectacle lens along the respective direction of the variable width of said one ringshaped diffusing structure.
  • a variable width of one ring-shaped diffusing structure may alternatively comprise that in each tangential direction or in different tangential directions an expansion of said one ring-shaped diffusing structure limited by an inner onset and an outer onset is of a different width.
  • a tangential direction shall be any direction from an optical centre or a fitting point of the digital twin of a spectacle lens radially outwards.
  • One ring-shaped diffusing structure having a variable width on the spectacle lens results from transferring a digital twin of a spectacle lens comprising one ring-shaped diffusing structure having a variable width in physical reality, by manufacturing said spectacle lens.
  • the definition given before with respect to one ring-shaped diffusing structure of a spectacle lens shall apply accordingly.
  • “More ring-shaped diffusing structures each having a variable width on a digital twin of a spectacle lens” shall comprise the definition provided before with respect to more ring-shaped diffusing structures of a digital twin of a spectacle lens.
  • a variable width of more ring-shaped diffusing structures designates a variable expansion of each of said more ring-shaped diffusing structures along a perpendicular direction to their respective circumferential direction as determined between respective onsets, i.e., a respective inner onset and a respective outer onset, of each ring-shaped diffusing structure of said more ring-shaped diffusing structures.
  • a respective onset of each ringshaped diffusing structure of said more ring-shaped diffusing structures represents each inner onset of each ring-shaped diffusing structure of said more ring-shaped diffusing structures, i.e., each first position and each outer onset of each ring-shaped diffusing structure of said more ring-shaped diffusing structures, i.e., each last position in which said one ring-shaped diffusing structure changes a calculated transmission of a digital twin of a spectacle lens along the respective direction of the variable width of each ring-shaped diffusing structure of said more ring-shaped diffusing structures.
  • a variable width of each ring-shaped diffusing structure of said more ring-shaped diffusing structures may alternatively comprise that in each tangential direction or in different tangential directions an expansion of each ring-shaped diffusing structure of said more ring-shaped diffusing structures limited by a respective inner onset and a respective outer onset is of a different width.
  • a tangential direction shall be any direction from an optical centre or a fitting point of the digital twin of the spectacle lens radially outwards.
  • More ring-shaped diffusing structures each having a variable width on a spectacle lens result from transferring a digital twin of a spectacle lens comprising said more ring-shaped diffusing structures each having a variable width in physical reality, by manufacturing said spectacle lens.
  • the definition provided before with respect to more ring-shaped diffusing structures of a spectacle lens shall apply accordingly.
  • the above-described problem is fully solved by a method being configured for calculating by a computer a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens described in the forgoing. Since the method for calculating said digital twin is addressing children as main intended wearers of a respective spectacle lens, a higher level of comfort and wearability is desirable to prevent the children from removing the spectacle lens.
  • a key benefit of the method described in the foregoing is that the at least one different structure disrupting a pattern created by at least one of the plurality of ring-shaped structures and the plurality of diffusing structures by replacing a respective ring-shaped structure or a respective ring-shaped diffusing structure or by adding at least one different structure to a respective pattern prevents the wearer of a spectacle lens, calculated by the method and transferred to physical reality from the respective digital twin thereof, from habituation to such a pattern.
  • the method is characterized in that said central zone width being within a range of 6 mm to 9.4 mm.
  • the method is characterized in that said surface-based fill factor is selected from at least one surface-based fill factor of the group consisting of:
  • each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being in a range of 0.6 mm to 0.7 mm, or
  • each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being in a range of 0.5 mm to 0.6 mm, or
  • each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being lower than 0.5 mm.
  • the computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens may comprise the step of
  • a central zone such as to comprise an optical centre or a fitting point of said digital twin, said optical centre defined analogously as in ISO 13666:2019(E), section 3.2.15, said fitting point defined analogously as in ISO 13666:2019(E), section 3.2.34.
  • the method is characterized in that said central zone comprises an optical centre or a fitting point of said digital twin, said optical central defined analogously as in ISO 13666:2019(E), section 3.2.15, said fitting point defined analogously as in ISO 13666:2019(E), section 3.2.34.
  • the computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens comprises the step of
  • said uniform width is larger than 0.2 mm and equal to or lower than 0.7 mm;
  • said uniform width is larger than 0.3 mm and equal to or lower than 0.7 mm;
  • said uniform width is equal or lower than 0.6 mm;
  • said uniform width is larger than 0.2 mm and equal to or lower than 0.6 mm;
  • said uniform width is larger than 0.3 mm and equal to or lower than 0.6 mm;
  • said uniform width is equal or lower than 0.5 mm
  • said uniform width is larger than 0.2 mm and equal to or lower than 0.5 mm;
  • said uniform width is larger than 0.3 mm and equal to or lower than 0.5 mm.
  • the method is csaid uniform width is within at least one range of the following group of ranges:
  • said uniform width is larger than 0.2 mm and equal to or lower than 0.7 mm;
  • said uniform width is larger than 0.3 mm and equal to or lower than 0.7 mm;
  • said uniform width is equal to or lower than 0.6 mm;
  • said uniform width is larger than 0.2 mm and equal to or lower than 0.6 mm;
  • said uniform width is larger than 0.3 mm and equal to or lower than 0.6 mm;
  • said uniform width is equal to or lower than 0.5 mm
  • said uniform width is larger than 0.2 mm and equal to or lower than 0.5 mm;
  • said uniform width is larger than 0.3 mm and equal to or lower than 0.5 mm.
  • the computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens may comprise the step of
  • a central zone width such as to be set within at least one range of the following group of ranges:
  • said central zone width is larger than 6 mm and lower than or equal to 7 mm;
  • said central zone width is larger than 7 mm and lower than or equal to 9.4 mm.
  • the method is characterized in that said central zone width is within at least one range of the following group of ranges:
  • said central zone width is larger than 6 mm and lower than or equal to 7 mm;
  • said central zone width is larger than 7 mm and lower than or equal to 9.4 mm.
  • the computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens comprises the step of
  • the method is characterized in that a difference of said surface power of each ring-shaped structure to said surface power of said lens surface comprising said plurality of ring-shaped structures outside a domain occupied by each ring-shaped structure of said plurality of ring-shaped structures is within at least one range of the following group of ranges:
  • the computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens may comprise the step of
  • variable width varies in a range of larger than 0.2 mm and equal or lower than 0.7 mm;
  • variable width varies in a range of larger than 0.3 mm and equal or lower than 0.7 mm;
  • variable width varies in a range of lower than 0.6 mm
  • variable width varies in a range of larger than 0.2 mm and equal or lower than 0.6 mm;
  • variable width varies in a range of larger than 0.3 mm and equal or lower than 0.6 mm;
  • variable width varies in a range of lower than 0.5 mm
  • variable width varies in a range of larger than 0.2 mm and equal or lower than 0.5 mm; (viii) said variable width varied in a range of larger than 0.3 mm and equal or lower than 0.5 mm.
  • variable width varies within at least one range of the following group of ranges:
  • variable width varies in a range of larger than 0.2 mm and equal to or lower than 0.7 mm;
  • variable width varies in a range of larger than 0.3 mm and equal to or lower than 0.7 mm;
  • variable width varies in a range of lower than 0.6 mm
  • variable width varies in a range of larger than 0.2 mm and equal to or lower than 0.6 mm;
  • variable width varies in a range of larger than 0.3 mm and equal to or lower than 0.6 mm;
  • variable width varies in a range of lower than 0.5 mm
  • variable width varies in a range of larger than 0.2 mm and equal to or lower than 0.5 mm;
  • variable width varies in a range of larger than 0.3 mm and equal to or lower than 0.5 mm.
  • the computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens may comprise the step of
  • variable surface power for said one ring-shaped structure having a variable surface power or for each of said more ring-shaped structures having a variable surface power such that the variable surface power is different to a surface power of a lens surface comprising said one or more ring-shaped structure(s) having said variable surface power outside a domain occupied by said one or more ring-shaped structure(s) having said variable surface power, varying within at least one range of the following group of ranges:
  • the method is characterized in that each of said one ringshaped structure having a variable surface power or each ring-shaped structure of said more ringshaped structures each having a variable surface power has said variable surface power which is different to said surface power of said lens surface comprising said one or more ring-shaped structure(s) having said variable surface power outside a domain occupied by said one ring-shaped structure or by each each ring-shaped structure of said more ring-shaped structures each having said variable surface power, said variable surface power varying within at least one range of the following group of ranges:
  • the method is further configured for manufacturing a spectacle lens based on the digital twin of the spectacle lens calculated by the method described before.
  • a computer comprising a processor is configured to perform the before described method.
  • a data processing system comprises a processor and a storage medium coupled to the processor, wherein the processor is adapted to perform the before described method based on a computer program stored on the storage medium.
  • Said computer program may be stored on a non-transitory tangible computer-readable storage medium, the computer program comprising instructions which, when the program is executed by a computer, cause the computer to carry out the method described before.
  • a computer program comprises instructions which, when the program is executed by a computer, cause the computer to carry out the before described method.
  • Said computer program may be stored on a non-transitory tangible computer-readable storage medium, the computer program comprising instructions which, when the program is executed by a computer, cause the computer to carry out the above-described method.
  • a computer-readable medium having stored thereon said computer program.
  • Said computer-readable storage medium may be a non-transitory tangible computer-readable storage medium.
  • a computer-readable medium comprises instructions which, when executed by a computer, cause the computer to carry out the before described computer- implemented method.
  • Said computer-readable storage medium may be a non-transitory tangible computer-readable storage medium.
  • a computer-readable data carrier having stored thereon the before mentioned computer program.
  • a data carrier signal is carrying the before mentioned computer program.
  • the data set according to the invention comprises the following kinds of data: i) a digital twin of the spectacle lens as described before, said digital twin being configured for the purpose of use for a manufacture of the spectacle lens as described before, and ii) data containing computer-readable instructions for controlling one or more manufacturing machines in order to produce the spectacle lens as described before.
  • a digital twin of the spectacle lens being configured for the purpose of a use of the digital twin for manufacturing the spectacle lens, said digital twin comprises a central zone having a central zone width within a range of 6 mm to 9.4 mm, and at least one of
  • each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of diffusing structures having a respective uniform width, said uniform width being equal to or lower than 0.7 mm, each ring-shaped structure of said plurality of ring-shaped structures having a surface power which is different to a surface power of a lens surface of said digital twin of said spectacle lens comprising said plurality of ring-shaped structures outside a domain occupied by each ring-shaped structure of said plurality of ring-shaped structures, said spectacle lens having a surface-based fill factor defined as a surface area ratio of a surface area of an innermost ring-shaped structure of said plurality of ring-shaped structures or of an innermost ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures and a sum of said surface area of said innermost ring-shaped structure of said plurality of ring-shaped structures or said innermost ring-shaped diffusing structure of said plurality of
  • each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being in a range of 0.6 mm to 0.7 mm;
  • each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being in a range of 0.5 mm to 0.6 mm;
  • each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being lower than 0.5 mm;
  • said digital tiwn of said spectacle lens being characterized in comprising at least one feature of the following group of features outside said central zone:
  • ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width.
  • the digital twin of the spectacle lens being configured for the purpose of a use of the digital twin for manufacturing the spectacle lens, said digital twin comprises a central zone having a central zone width within a range of 6 mm to 9.4 mm, and at least one of
  • each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures having a respective uniform width, said uniform width being equal to or lower than 0.7 mm, each ring-shaped structure of said plurality of ring-shaped structures having a surface power which is different to a surface power of a lens surface of said digital twin of said spectacle lens comprising said plurality of ring-shaped structures outside a domain occupied by each ring-shaped structure of said plurality of ring-shaped structures, said digital tiwn of said spectacle lens being characterized in comprising at least one feature of the following group of features outside said central zone:
  • each ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures having a uniform width equal to or lower than 0.7 mm
  • each ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power
  • one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width, and in having a surface-based fill factor defined as a surface area ratio of a surface area of an innermost structure, said innermost structure being ring-shaped, said innermost structure being selected from one of the group consisting of a ring-shaped structure of said plurality of ring-shaped structures, a ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures, a ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures, a ring-shaped structure having said variable surface power of said one ring-shaped structure having said variable surface power or said more ring-shaped structures each having said variable surface power, a ring-shaped structure having said variable width of said one ring-shaped structure having said variable width or said more ring-shaped structures each having said variable width, and a ring-shaped diffusing structure having said variable width of said one ring-shaped diffusing
  • each structure being ring-shaped, each structure being selected from at least one of the group consisting of said ring-shaped structure, said ring-shaped diffusing structure, said ring-shaped diffractive structure, said ring-shaped structure having said variable surface power, or said surface-based fill factor being at least one of
  • variable width of each structure varying in a range of 0.6 mm to 0.7 mm
  • variable width of each structure varying in a range of 0.5 mm to 0.6 mm
  • each structure being ring-shaped, each structure being selected from at least one of the group consisting of said ring-shaped structure having said variable width and said ring-shaped diffusing structure having said variable width.
  • the digital twin of the spectacle lens being configured for the purpose of a use of the digital twin for manufacturing the spectacle lens, said digital twin lens is characterized in that the surface-based fill factor is at least one of
  • each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being in a range of 0.6 mm to 0.7 mm;
  • each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being in a range of 0.5 mm to 0.6 mm;
  • each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being lower than 0.5 mm;
  • the digital twin of the spectacle lens being configured for the purpose of a use of the digital twin for manufacturing the spectacle lens, said digital twin comprises a central zone having a central zone width within a range of 6 mm to 9.4 mm, and at least one of
  • each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures having a respective uniform width, said uniform width, each ring-shaped structure of said plurality of ring-shaped structures having a surface power which is different to a surface power of a lens surface of said digital twin of said spectacle lens comprising said plurality of ring-shaped structures outside a domain occupied by each ring-shaped structure of said plurality of ring-shaped structures, said spectacle lens being characterized in comprising at least one feature of the following group of features outside said central zone:
  • ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width.
  • the digital twinb spectacle lens described in the foregoing having at least one structure selected from a ring-shaped structure, a ring-shaped diffusing structure, a ring-shaped diffractive structure, a ringshaped structure having said variable surface power, a ring-shaped structure having said variable width, and a ring-shaped diffusing structure having said variable width, the at least one structure disrupting a pattern created by at least one of the plurality of ring-shaped structures and the plurality of ring-shaped diffusing structures prevents the wearer of a spectacle lens, resulting from a transfer of said digital twin to physical reality, from habituation to such a pattern.
  • the digital twin of the spectacle lens is characterized in that the central zone comprises an optical centre or a fitting point of said spectacle lens, the optical centre as defined in ISO 13666:2019(E), section 3.2.15, the fitting point as defined in ISO 13666:2019(E), section 3.2.34.
  • the digital twin of the spectacle lens is characterized in that the uniform width of at least one of the group selected from each ring-shaped structure of said plurality of ring-shaped structures, and each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures each is within at least one range of the following group of ranges:
  • said uniform width is larger than 0.2 mm and equal to or lower than 0.7 mm;
  • said uniform width is larger than 0.3 mm and equal to or lower than 0.7 mm;
  • said uniform width is equal to or lower than 0.6 mm;
  • said uniform width is larger than 0.2 mm and equal to or lower than 0.6 mm;
  • said uniform width is larger than 0.3 mm and equal to or lower than 0.6 mm;
  • said uniform width is equal to or lower than 0.5 mm
  • said uniform width is larger than 0.2 mm and equal to or lower than 0.5 mm;
  • said uniform width is larger than 0.3 mm and equal to or lower than 0.5 mm.
  • said central zone width (cw110, cw210, cw310, ...) is larger than 6 mm and lower than or equal to 7 mm;
  • said central zone width (cw110, cw210, cw310, ...) is larger than 7 mm and lower than or equal to 9.4 mm.
  • the digital twin of the spectacle lens is characterized in that a difference of the surface power of each ring-shaped structure of said plurality of ring-shaped structures to the surface power of the lens surface comprising said plurality of ring-shaped structures outside the domain occupied by each ringshaped structure of said plurality of ring-shaped structures, is within at least one range of the following group of ranges:
  • the digital twin of the spectacle lens is characterized in that the variable width of at least one of the group consisting of said one ring-shaped structure having a variable width, each ring-shaped structure of said more ring-shaped structures each having a variable width, said one ring-shaped diffusing structure having a variable width and each ring-shaped diffusing structure of said more ring-shaped diffusing structures each having a variable width, varies within at least one range of the following group of ranges:
  • variable width varies in a range of larger than 0.2 mm and equal to or lower than 0.7 mm;
  • variable width varies in a range of larger than 0.3 mm and equal to or lower than 0.7 mm;
  • variable width varies in a range of lower than 0.6 mm
  • variable width varies in a range of larger than 0.2 mm and equal to or lower than 0.6 mm;
  • variable width varies in a range of larger than 0.3 mm and equal to or lower than 0.6 mm;
  • variable width varies in a range of lower than 0.5 mm
  • variable width varies in a range of larger than 0.2 mm and equal to or lower than 0.5 mm;
  • variable width varies in a range of larger than 0.3 mm and equal to or lower than 0.5 mm.
  • the digital twin of the spectacle lens is characterized in that each of said one ring-shaped structure having the variable surface power or each ring-shaped structure of said more ring-shaped structures having the variable surface power provides the variable surface power to said spectacle lens which is different to the surface power of the lens surface comprising said one or more ring-shaped structure(s) each having said variable surface power outside a domain occupied by said one ring-shaped structure or each ring-shaped structure of said more ring-shaped structures each having said variable surface power, said variable surface power varying within at least one range of the following group of ranges:
  • Fig. 1 shows a (digital twin of a) single vision spectacle lens 100 with five ring-shaped structures 101 to 105.
  • Fig. 2 shows a cross-sectional view of the (digital twin of the) single vision spectacle lens 100 of figure 1 having a front surface 131 and a back surface 133.
  • a uniform width w101 to w103 of a ring-shaped structure is limited by an inner onset, io101 , io102, io103, and a respective outer onset, oo101 , oo102, oo103.
  • a central zone width cw110 is shown.
  • the three ring-shaped structures 101 to 103 are shown in figure 2 compared to the five ring-shaped structures 101 to 105 shown in figure 1 .
  • Fig. 3 shows a (digital twin of a) coated single vision spectacle lens 200 with five coated ring-shaped structures 201 to 205. 210 is a coated central zone.
  • Fig. 4 shows a cross-sectional view of the (digital twin of the) coated single vision spectacle lens 200 of figure 3 having a coated front surface 231 and a coated back surface 233, coated with a coating 237.
  • a uniform width w201 to w203 of a coated ring-shaped structure is limited by an inner onset, io201 , io202, io203, and a respective outer onset, oo201 , oo202, oo203.
  • a central zone width cw210 is shown. For simplicity reasons only the three ring-shaped structures 201 to 203 are shown in figure 4 compared to the five ring-shaped structures 201 to 205 shown in figure 3.
  • Fig. 5 shows a (digital twin of a) single vision spectacle lens 300 with five ring-shaped diffusing structures 301 to 305.
  • Fig. 6 shows a cross-sectional view of (the digital twin of) the single vision spectacle lens 300 of figure 5 having a front surface 331 and a back surface 333.
  • a uniform width w301 to w303 of a ring-shaped structure is limited by an inner onset, io301 , io302, io303, and a respective outer onset, oo301 , oo302, oo303.
  • a central zone width cw310 is shown.
  • the three ring-shaped diffusing structures 301 to 303 are shown in figure 6 compared to the five ring-shaped diffusing structures 301 to 305 shown in figure 5.
  • Table 1 below shows different calculated design characteristics of a digital twin of a spectacle lens, in the order of satisfaction of wearability of a respective spectacle lens evaluated by a wearer.
  • the subjects of a study evaluated said calculated design characteristics of said digital twin in a range from 1 to 10, wherein 10 equals to best possible wearability of respective a spectacle lens and 1 equals to the worst possible wearability of a respective spectacle lens.
  • a satisfaction of wearability greater or equal to 4.0 is considered as sufficient, hence children would probably accept such spectacle lenses with said satisfaction of wearability and would probably not to tend to dismiss the respective spectacle lens.
  • the lenses 1 to 9 in table 1 are therefore examples of a digital twin of a spectacle lens and a respective spectacle lens whereas spectacle lenses 10 to 16 are considered as reference spectacle lenses for the spectacle lenses 1 to 9 in reference to the satisfaction of wearability.
  • Table 1 Design characteristics of digital twins of spectacle lenses and respective spectacle lenses with the specific characterizations and wearer satisfaction and visual acuity when looking through the periphery of the lens.

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Abstract

The invention relates to a digital twin of a spectacle lens configured for the purpose of a use of the digital twin for manufacturing the spectacle lens comprising one ring-shaped structure or more ring- shaped structures or one ring-shaped diffusing structure or more ring-shaped diffusing structures and to a computer-implemented method configured for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens.

Description

Spectacle lens and method
Field of the invention
The present invention relates to a spectacle lens according to the preamble claim 1 and to a method being configured for calculating by a computer a digital twin of a spectacle lens according to the preamble of claim 8.
Related prior art
WO 2019/166659 A1 discloses a spectacle lens comprising concentric rings, arranged as shown in figure 1 1 b and described on page 20, lines 10 to 12.
ON 11 1103701 A discloses a spectacle lens comprising an annular cylindrical microstructure, arranged as shown in figure 1. The central optical area is circular having a radius of 5 mm to 10 mm, the center of the spectacle lens being the center of the circle. The annular cylindrical microstructure is located outside the central optical area having a radius between the one of the central optical area and 20 mm or more. The radial width of the annular cylindrical microstructures is 0.5 mm to 2 mm. The distance between the different cylindrical microstructures is 0.5 mm to 3 mm.
EP 4 006 624 A1 discloses a spectacle lens having an aperture and at least two ring-shaped focusing structures surrounding the aperture wherein a ring-shaped diffuser is formed by a ring-shaped contact line between the ring-shaped focusing structures.
PCT/EP2022/053854 discloses a spectacle lens comprising ring-shaped focusing structures surrounding a central clear zone having a central clear zone width of 6 mm to 9.4 mm. The ringshaped focusing structures have a width of equal or lower than 0.7 mm.
Problem to be solved
Based on PCT/EP2022/053854 the problem to be solved is to provide a spectacle lens comprising structures without causing discomfort to a spectacle lens wearer while preventing habituation of the spectacle lens wearer to the spectacle lens.
Summary of the invention
The problem has been solved by the spectacle lens according to claim 1 and the method being configured for calculating by a computer a digital twin of a spectacle lens according to claim 8.
Advantageous embodiments of the invention are the subject-matter of the dependent claims.
The spectacle lens according to the invention comprises a central zone having a central zone width within a range of 6 mm to 9.4 mm, and at least one of
- a plurality of ring-shaped structures,
- a plurality of ring-shaped diffusing structures, each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of diffusing structures having a respective uniform width, said uniform width being equal to or lower than 0.7 mm, each ring-shaped structure of said plurality of ring-shaped structures having a surface power which is different to a surface power of a lens surface of said spectacle lens comprising said plurality of ringshaped structures outside a domain occupied by each ring-shaped structure of said plurality of ringshaped structures, said spectacle lens having a surface-based fill factor defined as a surface area ratio of a surface area of an innermost ring-shaped structure of said plurality of ring-shaped structures or of an innermost ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures and a sum of said surface area of said innermost ring-shaped structure of said plurality of ring-shaped structures or said innermost ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures and a surface area of a peripheral zone, said surface-based fill factor being at least one of
- larger than 17 % and equal to or lower than 70 % for said uniform width of each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being in a range of 0.6 mm to 0.7 mm;
- larger than 15 % and equal to or lower than 60 % for said uniform width of each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being in a range of 0.5 mm to 0.6 mm;
- larger than 6 % and equal to or lower than 50 % for said uniform width of each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being lower than 0.5 mm; said spectacle lens being characterized in comprising at least one feature of the following group of features outside said central zone:
- one ring-shaped diffractive structure or more ring-shaped diffractive structures, a ring-shaped diffractive structure not being an innermost ring-shaped diffractive structure,
- one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power, a ring-shaped structure having a variable surface power not being an innermost ring-shaped structure having a variable surface power,
- one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width, a ring-shaped structure having a variable width not being an innermost ring-shaped structure having a variable width,
- one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width, a ring-shaped diffusing structure having a variable width not being an innermost ring-shaped diffusing structure having a variable width.
Alternatively, the spectacle lens according to the invention comprises a central zone having a central zone width within a range of 6 mm to 9.4 mm, and at least one of
- a plurality of ring-shaped structures,
- a plurality of ring-shaped diffusing structures, each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures having a respective uniform width, said uniform width being equal to or lower than 0.7 mm, each ring-shaped structure of said plurality of ring-shaped structures having a surface power which is different to a surface power of a lens surface of said spectacle lens comprising said plurality of ringshaped structures outside a domain occupied by each ring-shaped structure of said plurality of ringshaped structures, said spectacle lens being characterized in comprising at least one feature of the following group of features outside said central zone:
- one ring-shaped diffractive structure or more ring-shaped diffractive structures, each ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures having a uniform width equal to or lower than 0.7 mm,
- one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power, each ring-shaped structure having a variable surface power of said one ring-shaped structure having a variable surface power or said more ring-shaped structures each having a variable surface power having a uniform width equal to or lower than 0.7 mm,
- one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width,
- one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width, and in having a surface-based fill factor defined as a surface area ratio of a surface area of an innermost structure, said innermost structure being ring-shaped, said innermost structure being selected from one of the group consisting of a ring-shaped structure of said plurality of ring-shaped structures, a ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures, a ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures, a ring-shaped structure having said variable surface power of said one ring-shaped structure having said variable surface power or said more ring-shaped structures each having said variable surface power, a ring-shaped structure having said variable width of said one ring-shaped structure having said variable width or said more ring-shaped structures each having said variable width, and a ring-shaped diffusing structure having said variable width of said one ring-shaped diffusing structure having said variable width or said more ring-shaped diffusing structures each having said variable width, and a sum of said surface area of said innermost structure and a surface area of a peripheral zone, said surface-based fill factor being at least one of
- larger than 17 % and equal to or lower than 70 % for said uniform width of each structure being in a range of 0.6 mm to 0.7 mm,
- larger than 15 % and equal to or lower than 60 % for said uniform width of each structure being in a range of 0.5 mm to 0.6 mm,
- larger than 6 % and equal to or lower than 50 % for said uniform width of each structure being lower than 0.5 mm, each structure being ring-shaped, each structure being selected from at least one of the group consisting of said ring-shaped structure, said ring-shaped diffusing structure, said ring-shaped diffractive structure, said ring-shaped structure having said variable surface power, or said surface-based fill factor being at least one of
- larger than 17% and equal to or lower than 70% for said variable width of each structure varying in a range of 0.6 mm to 0.7 mm,
- larger than 15 % and equal to or lower than 60 % for said variable width of each structure varying in a range of 0.5 mm to 0.6 mm,
- larger than 6 % and equal to or lower than 50 % for said variable width of each structure being lower than 0.5 mm along each structure, each structure being ring-shaped, each structure being selected from at least one of the group consisting of said ring-shaped structure having said variable width and said ring-shaped diffusing structure having said variable width.
In a preferred embodiment of the invention, the spectacle lens is characterized in that the surfacebased fill factor is at least one of
- larger than 17 % and equal to or lower than 70 % for said uniform width of each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being in a range of 0.6 mm to 0.7 mm;
- larger than 17% and equal to or lower than 70% for said uniform width of each ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures or each ring-shaped structure having a variable surface power of said one ring-shaped structure having said variable surface power or said more ring-shaped structures each having said variable surface power, said uniform width being in a range of 0.6 mm to 0.7 mm;
- larger than 17% and equal to or lower than 70% for said variable width of each ring-shaped structure having a variable width of said one ring-shaped structure having said variable width or said more ring-shaped structures each having said variable width or each ring-shaped diffusing structure having a variable width of said one ring-shaped diffusing structure having said variable width or said more ring-shaped diffusing structures each having said variable width, said variable width varying in a range of 0.6 mm to 0.7 mm;
- larger than 15 % and equal to or lower than 60 % for said uniform width of each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being in a range of 0.5 mm to 0.6 mm;
- larger than 15 % and equal to or lower than 60 % for said uniform width of each ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures or each ring-shaped structure having a variable surface power of said one ring-shaped structure having said variable surface power or said more ring-shaped structures each having said variable surface power, said uniform width being in a range of 0.5 mm to 0.6 mm;
- larger than 15 % and equal to or lower than 60 % for said variable width of each ring-shaped structure having a variable width of said one ring-shaped structure having said variable width or said more ring-shaped structures each having said variable width or each ring-shaped diffusing structure having a variable width of said one ring-shaped diffusing structure having said variable width or said more ring-shaped diffusing structures each having said variable width, said variable width varying in a range of 0.5 mm to 0.6 mm;
- larger than 6 % and equal to or lower than 50 % for said uniform width of each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being lower than 0.5 mm;
- larger than 6 % and equal to or lower than 50 % for said uniform width of each ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures or each ring-shaped structure having a variable surface power of said one ring-shaped structure having said variable surface power or said more ring-shaped structures each having said variable surface power, said uniform width being lower than 0.5 mm;
- larger than 6 % and equal to or lower than 50 % for said variable width of each ring-shaped structure having a variable width of said one ring-shaped structure having said variable width or said more ring-shaped structures each having said variable width or each ring-shaped diffusing structure having a variable width of said one ring-shaped diffusing structure having said variable width or said more ring-shaped diffusing structures each having said variable width, said variable width being lower than 0.5 mm along each ring-shaped structure having said variable width.
Alternatively, the spectacle lens according to the invention comprises a central zone having a central zone width within a range of 6 mm to 9.4 mm, and at least one of
- a plurality of ring-shaped structures,
- a plurality of ring-shaped diffusing structures, each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures having a respective uniform width, said uniform width, each ring-shaped structure of said plurality of ring-shaped structures having a surface power which is different to a surface power of a lens surface of said spectacle lens comprising said plurality of ringshaped structures outside a domain occupied by each ring-shaped structure of said plurality of ringshaped structures, said spectacle lens being characterized in comprising at least one feature of the following group of features outside said central zone:
- one ring-shaped diffractive structure or more ring-shaped diffractive structures,
- one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power,
- one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width,
- one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width.
A “spectacle lens” is as defined in ISO 13666:2019(E), section 3.5.2, an ophthalmic lens (3.5.1) worn in front of, but not in contact with, the eyeball. A front surface of the spectacle lens is defined as in ISO 13666:2019(E), section 3.2.13, as surface of the spectacle lens intended to be fitted away from the eye. A back surface of the spectacle lens is defined as in ISO 13666:2019(E), section 3.2.14, as surface of the spectacle lens intended to be fitted nearer to the eye.
The spectacle lens preferably is a finished spectacle lens, the finished spectacle lens as defined in ISO 13666:2019(E), section 3.8.7 (finished lens), as lens (3.5.2) of which both sides have their final optical surface. The finished spectacle lens may be either an uncut spectacle lens as defined in ISO 13666:2019(E), section 3.8.8 (uncut lens) or an edged spectacle lens as defined in
ISO 13666:2019(E), section 3.8.9 (edged lens). The spectacle lens preferably is selected from at least one of
- a single-vision spectacle lens as defined in ISO 13666:2019(E), section 3.7.1 (single-vision lens),
- a position-specific single-vision spectacle lens as defined in ISO 13666:2019(E), section 3.7.2 (position-specific single-vision lens),
- a multifocal spectacle lens as defined in ISO 13666: 2019(E), section 3.7.3 (multifocal lens),
- a bifocal spectacle lens as defined in ISO 13666:2019(E), section 3.7.4 (bifocal lens),
- a trifocal spectacle lens as defined in ISO 13666:2019(E), section 3.7.5 (trifocal lens),
- a fused multifocal spectacle lens as defined in ISO 13666:2019(E), section 3.7.6 (fused multifocal lens),
- a power-variation spectacle lens as defined in ISO 13666:2019(E), section 3.7.7 (power-variation lens),
- a progressive-power spectacle lens as defined in ISO 13666:2019(E), section 3.7.8 (progressivepower lens).
The spectacle lens further preferably is selected from at least one of a single-vision spectacle lens and a position-specific single-vision spectacle lens.
The spectacle lens comprises or is based on an optical material. The optical material is as defined in ISO 13666:2019(E), section 3.3.1 , a transparent material capable of being manufactured into optical components. The optical material preferably comprises a thermosetting hard resin as defined in ISO 13666:2019(E), section 3.3.3, or a thermoplastic hard resin as defined in ISO 13666:2019(E), section 3.3.4. The optical material may additionally or alternatively comprise a glass as defined in ISO 13666:2019(E), section 3.3.2. The optical material preferably is having a uniform refractive index.
A structure shall be considered as “ring-shaped” if it surrounds a structure-free zone and there is a path within the structure which runs from a starting point within the structure around the structure-free zone and to the starting point again. Ring-shaped may comprise circular, elliptical or otherwise curved rings encircling a domain of a lens surface, i.e., a front surface or a back surface, of a spectacle lens. A domain encircled by one ring-shaped structure, or a domain encircled by a ring-shaped structure out of more or a plurality of ring-shaped structures preferably comprises directly adjacent to said ringshaped structure no further structure. A domain encircled by one ring-shaped diffusing structure, or a domain encircled by a ring-shaped diffusing structure out of more or a plurality of ring-shaped diffusing structures preferably comprises directly adjacent to said ring-shaped diffusing structure no further structure. A domain encircled by one ring-shaped diffractive structure, or a domain encircled by a ringshaped diffractive structure out of more ring-shaped diffractive structures preferably comprises directly adjacent to said (one) ring-shaped diffractive structure no further structure. A domain encircled by one ring-shaped structure having a variable surface power, or a domain encircled by a ring-shaped structure having a variable surface power out of more ring-shaped structures each having a variable surface power preferably comprises directly adjacent to said (one) ring-shaped structure having a variable surface power no further structure. A domain encircled by one ring-shaped structure having a variable width, or a domain encircled by a ring-shaped structure having a variable width out of more ring-shaped structures each having a variable width preferably comprises directly adjacent to said (one) ring-shaped structure having a variable width no further structure. A domain encircled by one ring-shaped diffusing structure having a variable width, or a domain encircled by a ring-shaped diffusing structure having a variable width out of more ring-shaped diffusing structures each having a variable width preferably comprises directly adjacent to said (one) ring-shaped diffusing structure having a variable width no further structure.
A structure-free domain of a structure, said structure being ring-shaped, is a domain of the spectacle lens or of the lens surface outside a respective domain occupied by each structure encircled or surrounded by said structure, said structure being selected from the group consisting of a ring-shaped structure of said plurality of ring-shaped structures, a ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures, a ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures, a ring-shaped structure having said variable surface power of said one ring-shaped structure having said variable surface power or said more ringshaped structures each having said variable surface power, a ring-shaped structure having said variable width of said one ring-shaped structure having said variable width or said more ring-shaped structures each having said variable width, and a ring-shaped diffusing structure having said variable width of said one ring-shaped diffusing structure having said variable width or said more ring-shaped diffusing structures each having said variable width.
A structure-free domain of the spectacle lens is a domain of the spectacle lens or of the lens surface outside a respective domain occupied by each structure, said structure being ring-shaped, said structure being selected from the before-mentioned group.
A surface of the ring-shaped structure of the spectacle lens may be selected from at least one of the following surfaces or may be pieced together from parts of at least one of the following surfaces:
- a part of a spherical surface, a spherical surface as defined in ISO 13666:2019(E), section 3.4.1 ;
- a cylindrical surface as defined in ISO 13666:2019(E), section 3.4.2;
- a part of a cylindrical surface;
- a part of an aspherical surface, an aspherical surface as defined in ISO 13666:2019(E), section 3.4.3;
- a part of a toroidal surface, a toroidal surface as defined in ISO 13666:2019(E), section 3.4.6;
- a part of an atoroidal surface, an atoroidal surface as defined in ISO 13666:2019(E), section 3.4.7;
- a power-variation surface as defined in ISO 13666:2019(E), section 3.4.10;
- a part of a power-va nation surface.
The ring-shaped structure of the spectacle lens has a surface power which is different to a surface power of a lens surface of the spectacle lens comprising the ring-shaped structure outside a domain occupied by the ring-shaped structure. The surface power of the ring-shaped structure is defined as in ISO 13666:2019(E), section 3.10.4 (surface power), as a local ability of a surface of the ring-shaped structure to change the vergence of a bundle of rays incident at the surface. The surface power of the ring-shaped structure preferably is as in note 1 to the entry in ISO 13666:2019(E), section 3.10.4, determined from a radius or radii of the surface of the ring-shaped structure and a refractive index (3.1.5) of a material of the ring-shaped structure, and is calculated for light (3.1.2) incident or emergent in air. The refractive index may be an actual refractive index of the material of the ring-shaped structure or a nominal value. The refractive index of the material of the ring-shaped structure preferably is assumed to be a same as a refractive index of an optical material of a spectacle lens. The surface power of a lens surface of the spectacle lens is defined as in ISO 13666:2019(E), section 3.10.4, as a local ability of a finished surface of a spectacle lens to change the vergence of a bundle of rays incident at the finished surface. The surface power of the lens surface is as in note 1 to the entry in ISO 13666:2019(E), section 3.10.4, determined from a radius or radii of the finished surface of the spectacle lens and a refractive index (3.1 .5) of an optical material (3.3.1) of the spectacle lens, and is calculated for light (3.1.2) incident or emergent in air. The refractive index may be an actual refractive index of the optical material or a nominal value.
Each surface of a ring-shaped structure of a plurality of ring-shaped structures or each surface of a ring-shaped structure of more ring-shaped structures of the spectacle lens each may be selected from at least one of the following surfaces or may be pieced together from parts of at least one of the following surfaces:
- a part of a spherical surface, a spherical surface as defined in ISO 13666:2019(E), section 3.4.1 ;
- a cylindrical surface as defined in ISO 13666:2019(E), section 3.4.2;
- a part of a cylindrical surface;
- a part of an aspherical surface, an aspherical surface as defined in ISO 13666:2019(E), section 3.4.3;
- a part of a toroidal surface, a toroidal surface as defined in ISO 13666:2019(E), section 3.4.6;
- a part of an atoroidal surface, an atoroidal surface as defined in ISO 13666:2019(E), section 3.4.7;
- a power-variation surface as defined in ISO 13666:2019(E), section 3.4.10;
- a part of a power-variation surface.
Each surface of a ring-shaped structure of the more ring-shaped structures or each surface of a ringshaped structure of the plurality of ring-shaped structures of the spectacle lens each may be selected from a same surface, e.g., a same surface of the before mentioned, or may be pieced together from parts of a same surface, e.g., parts of a same surface of the before mentioned. Alternatively, each surface of a ring-shaped structure of the more ring-shaped structures or each surface of a ring-shaped structure of the plurality of ring-shaped structures of the spectacle lens may be different to one another, e.g., said different surfaces may be selected from the before mentioned, or may be pieced together from parts of different surfaces, e.g., parts of different surfaces of the before mentioned. Alternatively, at least one surface of the more ring-shaped structures or the plurality of ring-shaped structures of the spectacle lens may be different to other surfaces of the more ring-shaped structures or to other surfaces of the plurality of ring-shaped structures, e.g., each of said surface may be selected from the before mentioned ones or pieced together from parts of the before mentioned ones such that at least one surface is different from the other surfaces of the more or the plurality of ringshaped structures.
Each ring-shaped structure of the more or the plurality of ring-shaped structures of the spectacle lens has a surface power which is different to a surface power of a lens surface of the spectacle lens comprising the more or the plurality of ring-shaped structures outside each domain occupied by each ring-shaped structure of said more or said plurality of ring-shaped structures. The surface power of each ring-shaped structure of the more or the plurality of ring-shaped structures is defined as in ISO 13666:2019(E), section 3.10.4 (surface power), as a local ability of each surface of a ring-shaped structure of the more or the plurality of ring-shaped structures to change the vergence of a bundle of rays incident at each surface. The surface power of each ring-shaped structure of the more or the plurality of the ring-shaped structures preferably is as in note 1 to the entry in ISO 13666:2019(E), section 3.10.4, determined from a radius or radii of each surface of a ring-shaped shaped structure of the more or the plurality of ring-shaped structures and a refractive index (3.1.5) of a material of each ring-shaped structure of the more or the plurality of ring-shaped structures, and is calculated for light (3.1 .2) incident or emergent in air. The refractive index may be an actual refractive index of the material of each ring-shaped structure of the more or the plurality of ring-shaped structures or a nominal value. The refractive index of the material of each ring-shaped structure of the more or the plurality of ring-shaped structures preferably is assumed to be a same as a refractive index of an optical material of a spectacle lens.
The surface power of a lens surface of the spectacle lens is defined as in ISO 13666:2019(E), section 3.10.4 (surface power).
A “ring-shaped diffusing structure of a spectacle lens” constitute an optical element that is made of any material that diffuses or scatters light in some manner to transmit soft light. Diffuse light can be easily obtained by reflecting light from a white surface, while more compact diffusing structures may use translucent material, including ground glass, Teflon, holographs, opal glass, and greyed glass. A ringshaped diffusing structure may be regarded as a ring-shaped light modulating cell, preferably within a lens surface of said spectacle lens, said light modulating cell diffusing light as disclosed for example in WO 2020/261213 A1 or as one ring-shaped scattering centre, preferably within a lens surface of said spectacle lens, said scattering centre as disclosed for example in WO 2020/180817 A1 or in WO 2022/251713 A1.
A “lens surface of the spectacle lens” is either the front surface or the back surface of the spectacle lens. The lens surface is as defined in ISO 13666:2019(E), section 3.4 and may be formed as one of the following surfaces:
- as a spherical surface as defined in ISO 13666:2019(E), section 3.4.1 ,
- as a cylindrical surface as defined in ISO 13666:2019(E), section 3.4.2,
- as an aspherical surface as defined in ISO 13666:2019(E), section 3.4.3,
- as a toroidal surface as defined in ISO 13666:2019(E), section 3.4.6,
- as an atoroidal surface as defined in ISO 13666:2019(E), section 3.4.7, - as a power-variation surface as defined in ISO 13666:2019(E), section 3.4.10.
A uniform width of one ring-shaped structure or of one ring-shaped diffusing structure designates an expansion of said one ring-shaped structure or said one ring-shaped diffusing structure along a direction perpendicular to its circumferential direction as determined between onsets of said one ringshaped structure or of said one ring-shaped diffusing structure. An onset of one ring-shaped structure represents an inner onset (io), i.e., a first position and an outer onset (oo), i.e., a last position in which a surface of said one ring-shaped structure deviates from a surface, preferably in the sense of surface shape, form or topography, of a lens surface of a digital twin of spectacle lens or of a lens surface of a spectacle lens, each comprising said one ring-shaped structure along the direction of the uniform width of said ring-shaped structure. An onset of one ring-shaped diffusing structure represents an inner onset, i.e., a first position, and an outer onset, i.e., a last position, in which said one ring-shaped diffusing structure changes a calculated transmission of a digital twin of a spectacle lens or a transmission of a spectacle lens along the direction of the uniform width of said ring-shaped diffusing structure. Throughout the description it shall be understood that an inner onset is an onset that preferably is closer to a central zone and an outer onset preferably is further away from a central zone. A uniform width of one ring-shaped structure or of one ring-shaped diffusing structure may alternatively comprise that in each tangential direction an expansion of said one ring-shaped structure or said one ring-shaped diffusing structure limited by a respective inner onset and a respective outer onset is of a same or uniform width. A tangential direction shall be any direction from an optical centre or a fitting point of the digital twin of a spectacle lens or of a spectacle lens radially outwards. The optical centre of a digital twin of a spectacle lens is defined analogously as in ISO 13666:2019(E), section 3.2.15, as an intersection of the optical axis with the front surface of the digital twin. The optical centre of a spectacle lens is as defined in ISO 13666:2019(E), section 3.2.15, an intersection of the optical axis (3.1 .8) with the front surface (3.2.13) of a spectacle lens (3.5.2). The fitting point of a digital twin of a spectacle lens is defined analogously as in ISO 13666:2019(E), section 3.2.34, as a point on the front surface of the digital twin to be stipulated by the manufacturer for virtually positioning the digital twin in front of an eye. The fitting point of a spectacle lens is as defined in
ISO 13666:2019(E), section 3.2.34, a point on the front surface (3.2.13) of a spectacle lens (3.5.2) or blank (3.8.1) stipulated by the manufacturer for positioning the spectacle lens in front of the eye.
A “uniform width of each ring-shaped structure of a plurality of ring-shaped structures or of a plurality of ring-shaped diffusing structures” or a uniform width of each ring-shaped structure of more ringshaped structures or of more ring-shaped diffusing structures each designates an expansion of each ring-shaped structure of said more or said plurality of ring-shaped structures or of each ring-shaped diffusing structure of said more or said plurality of ring-shaped diffusing structures each along a direction perpendicular to their respective circumferential direction as determined between respective onsets of each ring-shaped structure of said more or said plurality of ring-shaped structures or of each ring-shaped diffusing structure of said more or said plurality of ring-shaped diffusing structures. A respective onset of each ring-shaped structure of said more or said plurality of ring-shaped structures represents each inner onset of each ring-shaped structure of said more or said plurality of ring-shaped structures, i.e., each first position and each outer onset of each ring-shaped structure of said more or said plurality of ring-shaped structures, i.e., each last position in which a surface of a respective ringshaped structure deviates from a surface, each preferably in the sense of surface shape, form or topography, of a lens surface of a digital twin of a spectacle lens or a spectacle lens, each comprising said more or said plurality of ring-shaped structures, along the direction of the respective uniform widths of said more or said plurality of ring-shaped structures. A respective onset of each ring-shaped diffusing structure of said more or said plurality of ring-shaped diffusing structures represents each inner onset, i.e., each first position, and each outer onset, i.e., each last position, in which each ringshaped diffusing structure of said more or said plurality of ring-shaped diffusing structures changes a calculated transmission of digital twin of a spectacle lens or a transmission of a spectacle lens, along the direction of the respective uniform widths of said more or the plurality of ring-shaped diffusing structures.
A uniform width of each ring-shaped structure of said more or said plurality of ring-shaped structures or of each ring-shaped diffusing structure of said more or said plurality of ring-shaped diffusing structures may alternatively comprise that in each tangential direction an expansion of each ringshaped structure of said more or said plurality of ring-shaped structures or each ring-shaped diffusing structure of said more or said plurality of ring-shaped diffusing structures each limited by a respective inner onset and a respective outer onset is of a same or uniform width. A tangential direction shall be any direction from an optical centre or a fitting point of the digital twin of the spectacle lens or the spectacle lens radially outwards.
A “central zone” is a domain of a lens surface, i.e., a front surface and/or a back surface, of a digital twin of a spectacle lens or a spectacle lens not comprising the plurality of ring-shaped structures or not comprising the plurality of ring-shaped diffusing structures. An innermost ring-shaped structure of said plurality of ring-shaped structures is or may be adjacent to said central zone, thereby encircling said central zone. Alternatively, an innermost of said plurality of ring-shaped diffusing structures is or may be adjacent to said central zone, thereby encircling said central zone. Preferably, said central zone comprise at least one of an optical centre and a fitting point of the digital twin of the spectacle lens or the spectacle lens.
The central zone is the domain of the lens surface of the digital twin of the spectacle lens or the spectacle lens not comprising:
- one ring-shaped diffractive structure or more ring-shaped diffractive structures,
- one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power,
- one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width,
- one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width.
An innermost ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures may be adjacent to said central zone, thereby encircling said central zone. An innermost ring-shaped structure having a variable surface power of said one ring- shaped structure having said variable surface power or said more ring-shaped structures each having said variable surface power may be adjacent to said central zone, thereby encircling said central zone. An innermost ring-shaped structure having a variable width of said one ring-shaped structure having said variable width or said more ring-shaped structures each having said variable width may be adjacent to said central zone, thereby encircling said central zone. An innermost ring-shaped diffusing structure having a variable width of said one ring-shaped diffusing structure having said variable width or said more ring-shaped diffusing structures each having said variable width may be adjacent to said central zone, thereby encircling said central zone.
A “central zone width” is a maximum expansion of a domain of said central zone on a lens surface of a digital twin of a spectacle lens or a spectacle lens, i.e., a respective front surface and/or a respective back surface thereof, said domain is or may be limited by two inner onsets of an innermost ringshaped structure of more or the plurality of ring-shaped structures in opposite tangential directions or by two inner onsets of an innermost ring-shaped diffusing structure of more or the plurality of ringshaped diffusing structures in opposite tangential directions. The central zone width is a maximum expansion of the domain of said central zone on the lens surface of a digital twin of a spectacle lens or a spectacle lens, said domain may be limited by two inner onsets of:
- an innermost ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures in opposite tangential directions,
- an innermost ring-shaped structure having a variable surface power of said one ring-shaped structure having said variable surface power or said more ring-shaped structures each having said variable surface power in opposite tangential directions,
- an innermost ring-shaped structure having a variable width of said one ring-shaped structure having said variable width or said more ring-shaped structures each having said variable width in opposite tangential directions,
- an innermost ring-shaped diffusing structure having a variable width of said one ring-shaped diffusing structure having said variable width or said more ring-shaped diffusing structures each having said variable width in opposite tangential directions.
Alternatively, a central zone width may be a maximum expansion of a domain of said central zone on a lens surface of a digital twin of a spectacle lens or a spectacle lens, i.e., a respective front surface and/or a respective back surface thereof, limited by the respective before mentioned two inner onsets along each line through an optical centre or a fitting point of the spectacle lens.
A central zone with a central zone width within a range of 6 mm to 9.4 mm has the advantage that a small central zone, e.g., 6 mm increases the probable efficacy of the spectacle lens for the reduction of progression of myopia for the wearer. At the same time said small central zone decreases the acceptance of the spectacle lens by the wearer due to the decreased comfort of wearability of the spectacle lens. A large central zone, e.g., 9.4 mm decreases the probable efficacy of the spectacle lens for the reduction of progression of myopia for the wearer. At the same time said large central zone increases the acceptance of the spectacle lens by the wearer due to the increased comfort of wearability of the spectacle lens. A “surface-based fill factor” is or may be determined by a surface area ratio of a surface area of an innermost ring-shaped structure of more or the plurality of ring-shaped structures and a sum of said surface area of said innermost ring-shaped structure of said more or said plurality of ring-shaped structures and a surface area of a peripheral zone. A “surface-based fill factor” is or may be determined by a surface area ratio of a surface area of an innermost ring-shaped diffusing structure of more or the plurality of ring-shaped diffusing structures and a sum of said surface area of said innermost ring-shaped diffusing structure of said more or said plurality of ring-shaped diffusing structures and a surface area of a peripheral zone.
The surface-based fill factor is or may be defined as a surface area ratio of a surface area of an innermost structure, said innermost structure being ring-shaped, said innermost structure being selected from one of the group consisting of a ring-shaped structure of said plurality of ring-shaped structures, a ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures, a ringshaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures, a ring-shaped structure having said variable surface power of said one ringshaped structure having said variable surface power or said more ring-shaped structures each having said variable surface power, a ring-shaped structure having said variable width of said one ringshaped structure having said variable width or said more ring-shaped structures each having said variable width, and a ring-shaped diffusing structure having said variable width of said one ringshaped diffusing structure having said variable width or said more ring-shaped diffusing structures each having said variable width, and a sum of said surface area of said innermost structure and a surface area of a peripheral zone.
The surface-based fill factor is or may be defined as one of the following: i) a surface area ratio of a surface area of an innermost ring-shaped structure of said plurality of ringshaped structures and a sum of said surface area of said innermost ring-shaped structure of said plurality of ring-shaped structures and a surface area of a peripheral zone, ii) a surface area ratio of a surface area of an innermost ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures and a sum of said surface area of said innermost ringshaped diffusing structure of said plurality of ring-shaped diffusing structures and a surface area of a peripheral zone, iii) a surface area ratio of a surface area of an innermost ring-shaped diffractive structure of said more ring-shaped diffractive structures and a sum of said surface area of said innermost ring-shaped diffractive structure of said more ring-shaped diffractive structures and a surface area of a peripheral zone, iv) a surface area ratio of a surface area of an innermost ring-shaped structure having a variable surface power of said more ring-shaped structures each having said variable surface power and a sum of said surface area of said innermost ring-shaped structure having said variable surface power of said more ring-shaped structures each having said variable surface power and a surface area of a peripheral zone, v) a surface area ratio of a surface area of an innermost ring-shaped structure having a variable width of said more ring-shaped structures each having said variable width and a sum of said surface area of said innermost ring-shaped structure having said variable width of said more ring-shaped structures each having said variable width and a surface area of a peripheral zone, vi) a surface area ratio of a surface area of an innermost ring-shaped diffusing structure having a variable width of said more ring-shaped diffusing structures each having said variable width and a sum of said surface area of said innermost ring-shaped diffusing structure of said more ring-shaped diffusing structures each having said variable width and a surface area of a peripheral zone,
In case a lens surface of a digital twin of a spectacle lens or a lens surface of a spectacle lens, i.e., a respective front surface and/or a respective back surface thereof, comprises one ring-shaped structure only or one ring-shaped diffusing structure only, a peripheral zone is additionally to a central zone a further domain of the respective lens surface, not comprising one or more ring-shaped structure(s) or not comprising one or more ring-shaped diffusing structure(s). Said one ring-shaped structure or said one ring-shaped diffusing structure each is separating said central zone from said peripheral zone. In case said lens surface of said digital twin of said spectacle lens or of said spectacle lens comprises said one ring-shaped structure or said one ring-shaped diffusing structure said peripheral zone expands from an outer onset line of said one ring-shaped structure or from an outer onset line of said ring-shaped diffusing structure to an edge of said lens surface. The respective outer onset line passes along each outer onset of said one ring-shaped structure or each outer onset of said one ring-shaped diffusing structure, the respective outer onset line is thereby surrounded or encircled by said peripheral zone.
Throughout the description it shall be understood that an inner onset line is an onset line that preferably is closer to a central zone and an outer onset line preferably is further away from a central zone.
With respect to each of one ring-shaped diffractive structure, one ring-shaped structure having a variable surface power, one ring-shaped structure having a variable width and one ring-shaped diffusing structure having a variable width the before given definition of a peripheral zone shall apply analogously.
A “peripheral zone” of a lens surface of a spectacle lens or a digital twin of a spectacle lens, i.e., a respective front surface and/or a respective back surface thereof, comprising more or a plurality of ring-shaped structures or more or a plurality of ring-shaped diffusing structures, is additionally to a central zone a further domain of the respective lens surface, not comprising a ring-shaped structure or not comprising a ring-shaped diffusing structures. Thus, the peripheral zone is the further domain not comprising a ring-shaped structures or not comprising a ring-shaped diffusing structures closest to a central zone and separated from the central zone by an innermost ring-shaped structure of said more or said plurality of ring-shaped structures or separated from the central zone by an innermost ringshaped diffusing structure of said more or said plurality of ring-shaped diffusing structures. In case said lens surface of said digital twin of said spectacle lens or of said spectacle lens comprises said more or said plurality of ring-shaped structures said peripheral zone expands from an outer onset line of said innermost ring-shaped structure to an inner onset line of a closest neighbouring ring-shaped structure of said more or said plurality of ring-shaped structures. In case said lens surface of said digital twin of said spectacle lens or of said spectacle lens comprises said more or said plurality of ring-shaped diffusing structures said peripheral zone expands from an outer onset line of said innermost ring-shaped structure to an inner onset line of a closest neighbouring ring-shaped diffusing structure of said more or said plurality of ring-shaped diffusing structures. The respective outer onset line passes along each outer onset of said innermost ring-shaped structure or each outer onset of said innermost ring-shaped diffusing structure, the respective outer onset line is thereby surrounded by said peripheral zone. The respective inner onset line passes along each inner onset of said closest neighbouring ring-shaped structure or each inner onset of said closest neighbouring ring-shaped diffusing structure, the respective inner onset line thereby limiting an expansion of said peripheral zone.
In case an innermost ring-shaped structure, optionally of said more or said plurality of ring-shaped structures, is closest neighbouring a ring-shaped diffusing-structure, optionally of said more or said plurality of ring-shaped diffusing structures, or in case an innermost ring-shaped diffusing structure, optionally of said more or said plurality of ring-shaped diffusing structures, is closest neighbouring a ring-shaped structure, optionally of said more or said plurality of ring-shaped structures, the before given definition for a peripheral zone in case of more or said plurality of ring-shaped structures or more or said plurality of ring-shaped diffusing structures shall apply analogously.
In general: The peripheral zone of the lens surface of the digital twin of the spectacle lens or the spectacle lens comprising a) at least one of the plurality of ring-shaped structure and the plurality of ring-shaped diffusing structure and b) at least one of: one ring-shaped diffractive structure or more ring-shaped diffractive structures, one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power, one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width, one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width, is defined with respect to a respective innermost structure and a respective closest neighbouring structure. Said respective innermost structure and said respective closest neighbouring structure both are ring-shaped structures. A respective outer onset line of said respective innermost structure passes along each outer onset of said innermost structure, the respective outer onset line is thereby surrounded by said peripheral zone. A respective inner onset line of said respective closest neighbouring structure passes along each inner onset of said respective closest neighbouring ringshaped structure, the respective inner onset line thereby limiting an expansion of said peripheral zone. In case at least one of the group consisting of said innermost ring-shaped structure, said innermost ring-shaped diffusing structure, said closest neighbouring ring-shaped structure, and said closest neighbouring ring-shaped diffusing structure is at least one selected from the group consisting of or is replaced by at least one selected from the group consisting of one ring-shaped diffractive structure, one ring-shaped structure having a variable surface power, one ring-shaped structure having a variable width and one ring-shaped diffusing structure having a variable width the before given definition of a peripheral zone in case of more or said plurality of ring-shaped structures or more or said plurality of ring-shaped diffusing structures shall apply analogously.
A surface area of one ring-shaped structure or of an innermost ring-shaped structure of more or a plurality of ring-shaped structures is determined by an inner onset line and an outer onset line of said one ring-shaped structure or said innermost ring-shaped structure. The surface area of one ringshaped diffusing structure or of an innermost ring-shaped diffusing structure of more or a plurality of ring-shaped diffusing structures is determined by an inner onset line and an outer onset line of said one ring-shaped diffusing structure or said innermost ring-shaped diffusing structure. The inner onset line passes along each inner onset of said one ring-shaped structure or said innermost ring-shaped structure, the inner onset line of said innermost ring-shaped structure is thereby surrounding or encircling a central zone. The inner onset line passes along each inner onset of said one ring-shaped diffusing structure or said innermost ring-shaped diffusing structure, the inner onset line of said innermost ring-shaped diffusing structure is thereby surrounding or encircling a central zone. The outer onset line passes along each outer onset of said one ring-shaped structure or said innermost ring-shaped structure, the outer onset line is thereby surrounded or encircled by a peripheral zone. The outer onset line passes along each outer onset of said one ring-shaped diffusing structure or said innermost ring-shaped diffusing structure, the outer onset line is thereby surrounded or encircled by a peripheral zone. The respective inner onset line and the respective outer onset line of said one ringshaped structure or said innermost ring-shaped structure or the respective inner onset line and the respective outer onset line of said one ring-shaped diffusing structure or said innermost ring-shaped diffusing structure each are enclosing a surface area along a lens surface, i.e., a front surface and/or back surface, of a digital twin of a spectacle lens or a spectacle lens, without structure(s), said surface area is the surface area of said one ring-shaped structure or said innermost ring-shaped structure of said more or said plurality of ring-shaped structures or is the surface area of said one ring-shaped diffusing structure or said innermost ring-shaped diffusing structure of said more or said plurality of ring-shaped diffusing structures.
In case at least one of said one ring-shaped structure, said one ring-shaped diffusing structure, said innermost ring-shaped structure, and said innermost ring-shaped diffusing structure is or is replaced by at least one selected from the group consisting of one ring-shaped diffractive structure, one ringshaped structure having a variable surface power, one ring-shaped structure having a variable width and one ring-shaped diffusing structure having a variable width the before given definition of a respective surface area shall apply analogously.
A “surface area of a peripheral zone” of a lens surface of a spectacle lens or a digital twin of a spectacle lens, i.e., a respective front surface and/or back surface thereof, each comprising more or a plurality of ring-shaped structures, is determined by an outer onset line of an innermost ring-shaped structure of said more or said plurality of ring-shaped structures and an inner onset line of a closest neighbouring ring-shaped structure of said more or said plurality of ring-shaped structures, a lens surface of a digital twin of a spectacle lens or A “surface area of a peripheral zone” of a lens surface of a spectacle lens, i.e., a respective front surface and/or back surface thereof, each comprising more or a plurality of ring-shaped diffusing structures, is determined by an outer onset line of an innermost ring-shaped diffusing structure of said more or said plurality of ring-shaped diffusing structures and an inner onset line of a closest neighbouring ring-shaped diffusing structure of said more or said plurality of ring-shaped diffusing structures. Said inner onset line of said closest neighbouring ring-shaped structure or said inner onset line of said closest neighbouring ring-shaped diffusing structure each passes along each inner onset of said closest neighbouring ring-shaped structure or said closest ringshaped diffusing structure, said respective inner onset line thereby surrounding and encircling the peripheral zone. The outer onset line of said innermost ring-shaped structure and the inner onset line of said closest neighbouring ring-shaped structure are enclosing a surface area along a lens surface of a digital twin of a spectacle lens or along a lens surface of a spectacle lens, each comprising said more or said plurality of ring-shaped structures, said surface area is the surface area of the peripheral zone. The outer onset line of said innermost ring-shaped diffusing structure and the inner onset line of said closest neighbouring ring-shaped diffusing structure are enclosing a surface area along a lens surface of a digital twin of a spectacle lens or along a lens surface of a spectacle lens, each comprising said more or said plurality of ring-shaped diffusing structures, said surface area is the surface area of the peripheral zone.
In case an innermost ring-shaped structure is neighbouring a closest ring-shaped diffusing structure, a surface area of a peripheral zone is determined by an outer onset line of the innermost ring-shaped structure and an inner onset line of a closest neighbouring ring-shaped diffusing structure. The outer onset line of said innermost ring-shaped structure and the inner onset line of said closest neighbouring ring-shaped diffusing structure are enclosing a surface area along a lens surface of a digital twin of a spectacle lens or along a lens surface a spectacle lens, each comprising said ring-shaped structure and said ring-shaped diffusing structure, said surface area is the surface area of the peripheral zone. In case an innermost ring-shaped diffusing structure is neighbouring a closest ring-shaped structure, a surface area of a peripheral zone is determined by an outer onset line of the innermost ring-shaped diffusing structure and an outer onset line of a closest neighbouring ring-shaped structure. The outer onset line of said innermost ring-shaped diffusing structure and the inner onset line of said closest neighbouring ring-shaped structure are enclosing a surface area along a lens surface of a digital twin of a spectacle lens or along a lens surface of a spectacle lens, each comprising said ring-shaped diffusing structure and said ring-shaped structure, said surface area is the surface area of the peripheral zone.
In case of more or a plurality of ring-shaped structures or in case of more or a plurality of ring-shaped diffusing structures, the before given definition of a peripheral zone shall apply analogously when an innermost ring-shaped structure or an innermost ring-shaped diffusing structure is closest neighboured by a structure selected from one of
- one or a ring-shaped diffractive structure,
- one or a ring-shaped structure having a variable surface power,
- one or a ring-shaped structure having a variable width,
- one or a ring-shaped diffusing structure having a variable width.
The before given definition of a peripheral zone shall apply analogously in case
- one innermost ring-shaped diffractive structure, or
- one innermost ring-shaped structure having a variable surface power, or
- one innermost ring-shaped structure having a variable width, or
- one innermost ring-shaped diffusing structure having a variable width is closest neighboured by a structure selected from one of
- one or a ring-shaped structure, - one or a ring-shaped diffusing structure,
- one or a ring-shaped diffractive structure,
- one or a ring-shaped structure having a variable surface power,
- one or a ring-shaped structure having a variable width,
- one or a ring-shaped diffusing structure having a variable width.
The surface-based fill-factor has the advantage to define a balance between wearability and manufacturing of a spectacle lens comprising at least two selected from the group consisting of said ring-shaped structure^), said ring-shaped diffusing structure(s), said ring-shaped diffractive structure(s), said ring-shaped structure(s) having a variable surface power, said ring-shaped structure^) having a variable width, said ring-shaped diffusing structure(s) having a variable width. A surface-based fill factor greater than 59.2% results in a decrease of comfortable wearability of the spectacle lens but increases the probable efficacy of the spectacle lens for the reduction of progression of myopia for the wearer. A surface-based fill factor smaller than 56.1 % results in a decrease of the probable efficacy of the spectacle lens for the reduction of progression of myopia for the wearer but increases the comfortable wearability of the spectacle lens. In other words, a well-defined balance between the wearability and the manufacturing of the inventive spectacle lens is achieved with a surface-based fill factor in the range of 34.6-59.2%. In particular, a surface-based fill factor of 46.4 to 47.7% is preferred.
‘‘One ring-shaped diffractive structure of a spectacle lens” may have a diffractive surface described for example in EP 3 561 578 A1 , paragraphs [0177] to [0180], or in WO 2020/261213 A1 , paragraph [00108],
“More ring-shaped diffractive structures of a spectacle lens” comprise more than one ring-shaped diffractive structures as described before.
“One ring-shaped structure having a variable surface power on a spectacle lens”: A variable surface power of one ring-shaped structure shall mean that the surface power as defined in
ISO 13666:2019(E), section 3.10.4, along a circumferential direction of said one ring-shaped structure is not uniform. Alternatively, one ring-shaped structure having a variable surface power shall mean that a surface power of said one ring-shaped structure along a direction perpendicular to a tangential direction is not uniform.
“More ring-shaped structures each having a variable surface power on a spectacle lens”: A variable surface power of each ring-shaped structure of said more ring-shaped structures shall mean that the surface power as defined in ISO 13666:2019(E), section 3.10.4, along a circumferential direction of each ring-shaped structure of said more ring-shaped structures is not uniform. Alternatively, more ringshaped structure having a variable surface power shall mean that a surface power of each ringshaped structure of said more ring-shaped structures along a direction perpendicular to a tangential direction is not uniform. “One ring-shaped structure having a variable width on a spectacle lens”: A “variable width of one ringshaped structure” designates a variable expansion of said one ring-shaped structure along different directions perpendicular to a circumferential direction as determined between onsets, i.e., an inner and an outer onset, of said one ring-shaped structure. An onset of one ring-shaped structure represents an inner onset, i.e., a first position and an outer onset, i.e., a last position in which a surface of said one ring-shaped structure deviates from a surface - surface preferably in the sense of surface shape, form or topography - of a lens surface of a spectacle lens comprising said one ring-shaped structure, along the respective direction of the variable width of said ring-shaped structure.
A variable width of one ring-shaped structure may alternatively comprise that in each tangential direction or in different tangential directions an expansion of said one ring-shaped structure limited by an inner onset and an outer onset is of a different width. A tangential direction shall be any direction from an optical centre or a fitting point of a spectacle lens radially outwards.
“More ring-shaped structures each having a variable width on a spectacle lens”: A “variable width of more ring-shaped structures” designates a variable expansion of each ring-shaped structure of said more ring-shaped structures along a perpendicular direction to their respective circumferential direction as determined between respective onsets, i.e., a respective inner onset and a respective outer onset, of each ring-shaped structure of said more ring-shaped structures. A “respective onset of each of said more ring-shaped structures” represents each inner onset of each ring-shaped structure of said more ring-shaped structures, i.e., each first position, and each outer onset of each ring-shaped structure of said more ring-shaped structures, i.e., each last position in which a surface of each ringshaped structure deviates from a surface, preferably in the sense of surface shape, form or topography, of a lens surface of a spectacle lens, each comprising said more ring-shaped structure, along the direction of the respective variable widths of each ring-shaped structure of said more ringshaped structures. A variable width of each of said more ring-shaped structures may alternatively comprise that in each tangential direction or in different tangential directions an expansion of each ring-shaped structure of said more ring-shaped structure limited by a respective inner onset and a respective outer onset is of a different width. A tangential direction shall be any direction from an optical centre or a fitting point of the spectacle lens radially outwards.
“One ring-shaped diffusing structure having a variable width on a spectacle lens”: A “variable width of one ring-shaped diffusing structure” designates a variable expansion of said one ring-shaped diffusing structure along different directions perpendicular to a circumferential direction as determined between onsets, i.e., an inner and an outer onset, of said one ring-shaped diffusing structure. An ’’onset of one ring-shaped diffusing structure” represents an inner onset, i.e., a first position and an outer onset, i.e., a last position in which said one ring-shaped diffusing structure changes a transmission of a spectacle lens along the respective direction of the variable width of said ring-shaped diffusing structure.
A variable width of one ring-shaped diffusing structure may alternatively comprise that in each tangential direction or in different tangential directions an expansion of said one ring-shaped diffusing structure limited by an inner onset and an outer onset is of a different width. A tangential direction shall be any direction from an optical centre or a fitting point of a spectacle lens radially outwards. "More ring-shaped diffusing structures each having a variable width on a spectacle lens”: A “variable width of more ring-shaped diffusing structures” designates a variable expansion of each ring-shaped diffusing structure of said more ring-shaped diffusing structures along a perpendicular direction to their respective circumferential direction as determined between respective onsets, i.e., a respective inner onset and a respective outer onset, of each ring-shaped diffusing structure of said more ring-shaped structures. A “respective onset of each of said more ring-shaped diffusing structures” represents each inner onset of each ring-shaped diffusing structure of said more ring-shaped diffusing structures, i.e., each first position, and each outer onset of each ring-shaped diffusing structure of said more ringshaped diffusing structures, i.e., each last position in which said each ring-shaped diffusing structure changes a transmission of a spectacle lens along the respective direction of the variable width of each ring-shaped diffusing structure of said more ring-shaped structures. A variable width of each ringshaped diffusing structure of said more ring-shaped structures may alternatively comprise that in each tangential direction or in different tangential directions an expansion of each ring-shaped diffusing structure of said more ring-shaped diffusing structure limited by a respective inner onset and a respective outer onset is of a different width. A tangential direction shall be any direction from an optical centre or a fitting point of the spectacle lens radially outwards.
The above-described problem is fully solved by the spectacle lens described in the forgoing. Since the intended wearers of a respective spectacle lens are children, a higher level of comfort and wearability prevent the children from removing the spectacle lens. Apart from the before mentioned benefit, a key benefit of the spectacle lens described in the foregoing is that the at least one structure selected from a ring-shaped structure, a ring-shaped diffusing structure, a ring-shaped diffractive structure, a ringshaped structure having said variable surface power, a ring-shaped structure having said variable width, and a ring-shaped diffusing structure having said variable width, the at least one structure disrupting a pattern created by at least one of the plurality of ring-shaped structures and the plurality of ring-shaped diffusing structures prevents the wearer from habituation to such a pattern.
In a preferred embodiment of the invention, the spectacle lens is characterized in that a central zone comprises an optical centre or a fitting point of the spectacle lens, the central zone as defined in ISO 13666:2019(E), section 3.2.15, said fitting point as defined in ISO 13666:2019(E), section 3.2.34.
In a preferred embodiment of the invention, the spectacle lens is characterized in that a uniform width of at least one of the group consisting of
- one ring-shaped structure, more ring-shaped structures, preferably each ring-shaped structure of said plurality of ring-shaped structures,
- one ring-shaped diffusing structure and more ring-shaped diffusing structures, preferably each ringshaped diffusing structure of said plurality of ring-shaped diffusing structures
- each ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ringshaped diffractive structures, - each ring-shaped structure having a variable surface power of said one ring-shaped structure having a variable surface power or said more ring-shaped structures each having a variable surface power, is within at least one range of the following group of ranges:
(i) said uniform width is larger than 0.2 mm and equal to or lower than 0.7 mm;
(ii) said uniform width is larger than 0.3 mm and equal to or lower than 0.7 mm;
(iii) said uniform width is equal or lower than 0.6 mm;
(iv) said uniform width is larger than 0.2 mm and equal to or lower than 0.6 mm;
(v) said uniform width is larger than 0.3 mm and equal to or lower than 0.6 mm;
(vi) said uniform width is equal or lower than 0.5 mm;
(vii) said uniform width is larger than 0.2 mm and equal to or lower than 0.5 mm;
(viii) said uniform width is larger than 0.3 mm and equal to or lower than 0.5 mm.
A uniform width within any one of the before mentioned ranges has the beneficial effect to define a well-defined balance between wearability and manufacturing of a respective spectacle lens. A decrease of the uniform width leads to a more comfortable wearability whereas an increase of the uniform width enables easier manufacturing of the respective spectacle lens.
In a preferred embodiment of the invention, the spectacle lens is characterized in that a central zone width is within at least one range of the following group of ranges:
(i) said central zone width (cw110, cw210, cw310, ...) is larger than 6 mm and lower than or equal to 7 mm;
(ii) said central zone width (cw110, cw210, cw310, ...) is larger than 7 mm and lower than or equal to 9.4 mm.
Reference is made to the before given explanation for said selection.
In a preferred embodiment of the invention, the spectacle lens is characterized in that a difference of a surface power of each ring-shaped structure of said plurality of ring-shaped structures to a surface power of a lens surface comprising said plurality of ring-shaped structures outside a domain occupied by each ring-shaped structure of said plurality of ring-shaped structures, is within at least one range of the following group of ranges:
A) a difference in surface power being within a range of larger than 6 dioptres and equal or lower than 12 dioptres;
B) a difference in surface power being within a range of larger than 7 dioptres and equal or lower than 11 dioptres;
C) a difference in surface power being within a range of larger than 8 dioptres and equal or lower than 10 dioptres.
A difference in surface power as in the selected ranges given before has the beneficial effect to further define a balance between wearability and manufacturing of a respective spectacle lens. A difference in surface power between 10 dioptres and 12 dioptres preferably increases the probable efficacy of the respective spectacle lens for a reduction of progression of myopia for a wearer. A difference in surface power between 6 dioptres and 8 dioptres preferably increases a comfortable wearability of a respective spectacle lens. In other words, a well-defined balance between wearability and manufacturing of the respective spectacle lens is achieved with a difference in surface power in the range of 6 dioptres to 12 dioptres. Due to the at least one structure different to at least one of the plurality of ring-shaped structures and the plurality of ring-shaped diffusing structures a habituation to such a spectacle lens preferably is prevented simultaneously.
In a preferred embodiment of the invention, the spectacle lens is characterized in that a variable width of at least one of the group consisting of one ring-shaped structure, more ring-shaped structures, preferably each ring-shaped structure of said more ring-shaped structures, one ring-shaped diffusing structure and more ring-shaped diffusing structures, preferably each ring-shaped diffusing structure of said more ring-shaped diffusing structures varies within at least one range of the following group of ranges:
(i) said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.7 mm;
(ii) said variable width varies in a range of larger than 0.3 mm and equal or lower than 0.7 mm;
(iii) said variable width varies in a range of lower than 0.6 mm;
(iv) said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.6 mm;
(v) said variable width varies in a range of larger than 0.3 mm and equal or lower than 0.6 mm;
(vi) said variable width varies in a range of lower than 0.5 mm;
(vii) said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.5 mm;
(viii) said variable width varies in a range of larger than 0.3 mm and equal or lower than 0.5 mm.
A variable width within any one of the before mentioned ranges has the beneficial effect to define a well-defined balance between wearability and manufacturing of a respective spectacle lens in each ring-shaped structure having a variable width or in each ring-shaped diffusing structure having a variable width. A decrease of the variable width within each ring-shaped structure or within each ringshaped diffusing structure leads to a more comfortable wearability whereas an increase of the variable width within each ring-shaped structure or within each ring-shaped diffusing structure enables easier manufacturing of the respective spectacle lens. Moreover, by the variable width of a respective ringshaped structure, a habituation effect to a spectacle lens comprising a respective structure is assumed to be prevented.
In a preferred embodiment of the invention, the spectacle lens is characterized in that each of one ring-shaped structure having a variable surface power or each ring-shaped structure of more ringshaped structures having a variable surface power has a variable surface power which is different to a surface power of a lens surface comprising said one or more ring-shaped structure(s) each having said variable surface power outside a domain occupied by said one ring-shaped structure or by each ring-shaped structure of said more ring-shaped structures each having said variable surface power, said variable surface power varying within at least one range of the following group of ranges:
A) a difference in surface power varying within a range of larger than 6 dioptres and equal to or lower than 12 dioptres;
B) a difference in surface power varying within a range of larger than 7 dioptres and equal to or lower than 11 dioptres; C) a difference in surface power varying within a range of larger than 8 dioptres and equal to or lower than 10 dioptres.
A difference in surface power varying within one ring-shaped structure having a variable surface power or within each ring-shaped structure of more ring-shaped structures each having a variable surface power as in the selected ranges given before has the beneficial effect to further define a balance between wearability and manufacturing of a respective spectacle lens. A difference in surface power varying between 10 dioptres and 12 dioptres within one ring-shaped structure having a variable surface power or within each ring-shaped structure of more ring-shaped structures each having a variable surface power preferably increases the probable efficacy of the respective spectacle lens for a reduction of progression of myopia for a wearer. A difference in surface power between 6 dioptres and 8 dioptres within one ring-shaped structure having a variable surface power or within each ringshaped structure of more ring-shaped structures each having a variable surface power preferably increases a comfortable wearability of a respective spectacle lens. In other words, a well-defined balance between wearability and manufacturing of the respective spectacle lens is achieved with a difference in surface power varying in the range of 6 dioptres to 12 dioptres within one ring-shaped structure having a variable surface power or within each ring-shaped structure of more ring-shaped structures having a variable surface power. Apart from that, again, the prevention of a habituation effect due to a structure different to at least one of the plurality of ring-shaped structures and the plurality of ring-shaped diffusing structures shall support the efficacy of such a spectacle lens.
A computer-implemented method configured for calculating a digital twin of a spectacle lensfor the purpose of a use of said digital twin for manufacturing the spectacle lens, said digital twin comprising at least one of more or a plurality of ring-shaped structures and more or a plurality of ring-shaped diffusing structures, each having a respective uniform width, comprises the steps of
- determining a central zone on a lens surface of said digital twin such as to comprise a central zone width within a range of 6 mm to 9.4 mm;
- arranging said more or said plurality of ring-shaped structures such that said an innermost of said more ring-shaped structures is positioned adjacent and along said central zone or arranging said more or said plurality of ring-shaped diffusing structures such that said an innermost of said more ring-shaped diffusing structures is positioned adjacent and along said central zone;
- determining a surface-based fill factor defined as a surface area ratio of a surface area of an innermost of said more or said plurality of ring-shaped structures or of an innermost of said more or said plurality of ring-shaped diffusing structures and a sum of said surface area of said innermost ring-shaped structure of said more or said plurality of ring-shaped structures or said innermost ringshaped diffusing structure of said more or said plurality of ring-shaped diffusing structures and a surface area of a peripheral zone, such that said surface-based fill factor is o larger than 17 % and equal to or lower than 70 % for said uniform width of said more or said plurality of ring-shaped structures or said more or said plurality of ring-shaped diffusing structures in a range of 0.6 mm to 0.7 mm, or o larger than 15 % and equal or lower than 60 % for said uniform width of said more or said plurality ring-shaped structures or said more or said plurality of ring-shaped diffusing structures in a range of 0.5 mm to 0.6 mm, or o larger than 6 % and equal or lower than 50 % for said uniform width of said more or said plurality of ring-shaped structures or said more ring-shaped diffusing structures lower than 0.5 mm; and is characterized in the step of a) replacing at least one of
- said one ring-shaped structure or of said one ring-shaped diffusing structure,
- each of said more ring-shaped structures or each of said more ring-shaped diffusing structures,
- at least one of said more ring-shaped structures or at least one of said more ring-shaped diffusing structures by
- one ring-shaped diffractive structure or more ring-shaped diffractive structures,
- one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power,
- one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width,
- one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width, or adding at least one of
- one ring-shaped diffractive structure or more ring-shaped diffractive structures,
- one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power,
- one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width,
- one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width, to
- said one ring-shaped structure or said one ring-shaped diffusing structure,
- said more ring-shaped structures or said more ring-shaped diffusing structures.
The method being configured for calculating by a computer a digital twin of a spectacle lens for the purpose of a use of said digital twin for manufacturing the spectacle lens according to the invention, said digital twin comprising at least one of a plurality of ring-shaped structures and a plurality of ringshaped diffusing structures, each having a respective uniform width, each ring-shaped structure of said plurality of ring-shaped structures having a surface power which is different to a surface power of a lens surface of said spectacle lens comprising said plurality of ringshaped structures outside a domain occupied by each ring-shaped structure of said plurality of ringshaped structures, the method being characterized in the step of a) replacing - each ring-shaped structure of said plurality of ring-shaped structures, or
- each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures, by at least one of
- a ring-shaped diffractive structure,
- a ring-shaped structure each having a variable surface power,
- a ring-shaped structure each having a variable width,
- a ring-shaped diffusing structure each having a variable width, or b) replacing
- one ring-shaped structure of said plurality of ring-shaped structures, or
- one ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures, by at least one of
- a ring-shaped diffractive structure,
- a ring-shaped structure each having a variable surface power,
- a ring-shaped structure each having a variable width,
- a ring-shaped diffusing structure each having a variable width, or c) replacing
- each ring-shaped structure of a subset of ring-shaped structures of said plurality of ring-shaped structures, or
- each ring-shaped diffusing structure of a subset of ring-shaped diffusing structures of said plurality of ring-shaped diffusing structures, by at least one of
- a ring-shaped diffractive structure,
- a ring-shaped structure each having a variable surface power,
- a ring-shaped structure each having a variable width,
- a ring-shaped diffusing structure each having a variable width, or d) adding at least one of
- one ring-shaped diffractive structure or more ring-shaped diffractive structures,
- one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power,
- one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width,
- one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width, to
- said plurality of ring-shaped structures or said plurality of ring-shaped diffusing structures, while maintaining a surface-based fill factor defined as a surface area ratio of a surface area of an innermost ring-shaped structure of said plurality of ring-shaped structures or of an innermost ringshaped diffusing structure of said plurality of ring-shaped diffusing structures and a sum of said surface area of said innermost ring-shaped structure of said plurality of ring-shaped structures or said innermost ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures and a surface area of a peripheral zone, said innermost ring-shaped structure of said plurality of ring-shaped structures or said innermost ringshaped diffusing structure of said plurality of ring-shaped diffusing structures each being positioned adjacent and along a central zone.
A “digital twin of a spectacle lens” shall be defined analogously as in ISO 13666:2019(E), section 3.5.2 (spectacle lens), as a digital twin of an ophthalmic lens worn, when transferred to physical reality, in front of, but not in contact with, the eyeball. The digital twin of the spectacle lens is for the purpose of a use of the digital twin for manufacturing the spectacle lens. The digital twin of a spectacle lens is a mathematical description of a front surface of the spectacle lens, a mathematical description of a back surface of the spectacle lens, said mathematical descriptions including a relative orientation of the front surface and the back surface and a refractive index of an optical material between the front surface and the back surface. A front surface of said digital twin of said spectacle lens is defined analogously as in ISO 13666:2019(E), section 3.2.13, as a surface which when said digital twin is transferred to physical reality is intended to be fitted away from the eye. A back surface of said digital twin of said spectacle lens is defined analogously as in ISO 13666:2019(E), section 3.2.14, as a surface which when said digital twin is transferred to physical reality is intended to be fitted nearer to the eye. The digital twin of said spectacle lens is transferred to physical reality by manufacturing said spectacle lens. The refractive index of the optical material included in the mathematical descriptions preferably is a uniform refractive index. The refractive index of the optical material included in the mathematical descriptions preferably is the refractive index the spectacle lens has when the digital twin of the spectacle lens has been transferred to physical reality.
The digital twin of the spectacle lens may, for the purpose of a use of the digital twin for manufacturing the spectacle lens, additionally or alternatively, be one of the following:
- an analytical description or an analytical model describing or representing said spectacle lens. Said analytical description or said analytical model is for the purpose of a use for manufacturing said spectacle lens. Said analytical description or said analytical model preferably is a piecewise representation and comprises (a) a mathematical formula describing a lens surface of a front surface of said spectacle lens not considering one or more ring-shaped structure(s) or not considering one or more rings-shaped diffusing structure(s), i.e., the mathematical formula describing the front surface of said spectacle lens, (b) a mathematical formula describing a lens surface of a back surface of said spectacle lens not considering one or more ring-shaped structure(s) or not considering one or more rings-shaped diffusing structure(s), i.e., the mathematical formula describing the back surface of said spectacle lens, (c)(i) a piecewise mathematical formula describing one ring-shaped structure or one ring-shaped diffusing structure, in particular a surface, preferably as could be seen in the examples given below in the sense of surface shape, form or topography, a position and a domain of said one ring-shaped structure or said one ring-shaped diffusing structure or (c)(ii) piecewise mathematical formulas describing each ring-shaped structure of said more ring-shaped structures or each ringshaped diffusing structure of said more ring-shaped diffusing structures, in particular a surface, preferably as could be seen in the examples given below in the sense of surface shape, form or topography, a position and a domain of each ring-shaped structure of said more ring-shaped structures or of each ring-shaped diffusing structure of said more ring-shaped diffusing structures, (d) a mathematical formula describing a relative orientation of the lens surface of the front surface to the lens surface of the back surface, i.e., the mathematical formula describing the relative orientation of the front surface to the back surface, and (e) a mathematical formula describing a refractive index of an optical material. Alternatively, said analytical description or said analytical model is a piecewise representation and comprises (a) a mathematical formula or mathematical formulas describing a lens surface of a front surface, i.e., the mathematical formula or the mathematical formulas describing the front surface, considering optionally one ring-shaped structure or one ring-shaped diffusing structure or each ring-shaped structure of more ring-shaped structures or each ring-shaped diffusing structure of more ring-shaped diffusing structures, preferably the mathematical formula(s) describing the lens surface of the front surface inclusive one or more ring-shaped structure(s) or inclusive one or more ring-shaped diffusing structure^), (b) a mathematical formula or mathematical formulas describing a lens surface of a back surface, i.e., the mathematical formula or the mathematical formulas describing the back surface, considering optionally one ring-shaped structure or one ring-shaped diffusing structure or each ring-shaped structure of more ring-shaped structures or each ring-shaped diffusing structure of more ring-shaped diffusing structures, preferably the mathematical formula describing the lens surface of the back surface, (c) a mathematical formula describing a relative orientation of the lens surface of the front surface to the lens surface of the back surface, i.e., the mathematical formula describing the relative orientation of the front surface to the back surface, and (d) a mathematical formula describing a refractive index of a digital twin of a spectacle lens, i.e., the mathematical formula describing the refractive index of the optical material between the front surface and the back surface of the digital twin of the spectacle lens;
- an analytical description or an analytical model describing or representing said spectacle lens, said analytical description or said analytical model additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure(s) or said one or more ring-shaped diffusing structure(s);
- in the form of an analytical description or an analytical model representing said spectacle lens, said analytical description or said analytical model being for the purpose of a use for manufacturing said spectacle lens;
- in the form of an analytical description or an analytical model representing said spectacle lens, said analytical description or said analytical model additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure(s) or said one or more ring-shaped diffusing structure(s);
- said analytical description or said analytical model being (i) computer-readable data or (ii) in the form of computer-readable data, said computer-readable data being for the purpose of a use for manufacturing said spectacle lens;
- said analytical description or said analytical model being (i) computer-readable data or (ii) in the form of computer-readable data, said computer-readable data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure(s) or said one or more ring-shaped diffusing structure(s);
- said analytical description or said analytical model being for the purpose of a use for manufacturing said spectacle lens and being (i) stored on a computer-readable storage medium, (ii) embodied in a data signal or (iii) transferred via a data signal. The computer readable storage medium may be a non-transitory tangible computer-readable storage medium;
- numerical data describing or representing said spectacle lens. Said numerical data are for the purpose of a use for manufacturing said spectacle lens. Said numerical data preferably are comprising or being a conversion of said analytical description or said analytical model. Said numerical data preferably are comprising a pattern which comprises a) discrete x,y,z positions of or on a front surface of said spectacle lens and b) discrete x,y,z positions of or on a back surface of said spectacle lens. Said pattern comprising discrete x,y positions may be adapted or selected arbitrarily. Said numerical data comprises the function value of the analytical description or the analytical model of said lens surface in each of said discrete x,y positions. The function value in each discrete x,y position, i.e., the discrete x,y,z positions, of the front and back surface are described in the same coordinate system or a relative orientation of the coordinate systems of the front surface and the back surface is comprised in said numerical data. A refractive index of an optical material is comprised in said numerical data;
- numerical data describing or representing said spectacle lens, said numerical data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure(s) or said one or more ringshaped diffusing structure(s);
- in the form of numerical data describing or representing said spectacle lens, said numerical data being for the purpose of a use for manufacturing said spectacle lens;
- in the form of numerical data describing or representing said spectacle lens, said numerical data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure(s) or said one or more ring-shaped diffusing structure(s);
- said numerical data being (i) computer-readable data or (ii) in the form of computer-readable data, said computer-readable data being for the purpose of a use for manufacturing said spectacle lens;
- said numerical data being (i) computer-readable data or (ii) in the form of computer-readable data, said computer-readable data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure(s) or said one or more ring-shaped diffusing structure(s);
- said numerical data being for the purpose of a use for manufacturing said spectacle lens and being (i) stored on a computer-readable storage medium, (ii) embodied in a data signal or (iii) transferred via a data signal. The computer-readable storage medium may be a non-transitory tangible computer-readable storage medium;
- computer-readable data describing or representing said spectacle lens, said computer-readable data being for the purpose of a use for manufacturing said spectacle lens; - computer-readable data describing or representing said spectacle lens, said computer-readable data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure(s) or said one or more ring-shaped diffusing structure(s);
- in the form of computer-readable data describing or representing said spectacle lens, said computer- readable data being for the purpose of a use for manufacturing said spectacle lens;
- in the form of computer-readable data describing or representing said spectacle lens, said computer- readable data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure(s) or said one or more ring-shaped diffusing structure(s);
- said computer-readable data being for the purpose of a use for manufacturing said spectacle lens and being (i) stored on a computer-readable storage medium, (ii) embodied in a data signal or (iii) transferred via a data signal. The computer-readable storage medium may be a non-transitory tangible computer-readable storage medium;
- a virtual representation of said spectacle lens, said virtual representation being for the purpose of a use for manufacturing said spectacle lens;
- a virtual representation of said spectacle lens in the form of computer-readable data being for the purpose of a use for manufacturing said spectacle lens;
- a virtual representation of said spectacle lens in the form of computer-readable data, said computer- readable data additionally containing manufacturing instructions, preferably for obtaining final optical surfaces, said final optical surfaces optionally comprising said one or more ring-shaped structure(s) or said one or more ring-shaped diffusing structure(s);
- said virtual representation of said spectacle lens being for the purpose of a use for manufacturing said spectacle lens and being (i) stored on a computer-readable storage medium, (ii) embodied in a data signal or (iii) transferred via a data signal. The computer-readable storage medium may be a non-transitory tangible computer-readable storage medium;
- said virtual representation of said spectacle lens in the form of computer-readable data being for the purpose of manufacturing said spectacle lens and being (i) stored on a computer-readable storage medium, (ii) embodied in a data signal or (iii) transferred via a data signal. The computer-readable storage medium may be a non-transitory tangible computer-readable storage medium.
The spectacle lens results from a transfer of a digital twin of a spectacle lens to physical reality. The digital twin of the spectacle lens is transferred to physical reality by manufacturing the spectacle lens.
A ring-shaped structure of a digital twin of a spectacle lens is a mathematical description of a surface of a ring-shaped structure, said mathematical description not considering a mathematical description of a lens surface of the digital twin of the spectacle lens comprising the ring-shaped structure, for example not considering a mathematical description of a front surface comprising the ring-shaped structure. A ring-shaped structure of the digital twin of the spectacle lens is a single or same ringshaped structure of said digital twin, preferably out of the plurality of ring-shaped structures.
For characterizing the ring-shaped structure and not the lens surface of the digital twin of the spectacle lens comprising the ring-shaped structure, the mathematical description of the lens surface comprising the ring-shaped structure is a separate mathematical description from the mathematical description of the surface of the ring-shaped structure itself. The surface of the ring-shaped structure and the lens surface of the digital twin of the spectacle lens comprising the ring-shaped structure are mathematically described piecewise.
The surface of the ring-shaped structure of the digital twin of the spectacle lens may be selected from at least one of the following surfaces or may be pieced together from parts of at least one of the following surfaces:
- a part of a spherical surface, a spherical surface as defined in ISO 13666:2019(E), section 3.4.1 ;
- a cylindrical surface as defined in ISO 13666:2019(E), section 3.4.2;
- a part of a cylindrical surface;
- a part of an aspherical surface, an aspherical surface as defined in ISO 13666:2019(E), section 3.4.3;
- a part of a toroidal surface, a toroidal surface as defined in ISO 13666:2019(E), section 3.4.6;
- a part of an atoroidal surface, an atoroidal surface as defined in ISO 13666:2019(E), section 3.4.7;
- a power-variation surface defined analogously as in ISO 13666:2019(E), section 3.4.10;
- a part of a power-variation surface.
The ring-shaped structure of the digital twin of the spectacle lens has a surface power which is different to a surface power of a lens surface of the digital twin of the spectacle lens comprising the ring-shaped structure outside a domain occupied by the ring-shaped structure. The surface power of the ring-shaped structure shall be defined analogously as in ISO 13666:2019(E), section 3.10.4 (surface power), as a local ability of the surface of the ring-shaped structure to change the calculated vergence of a digitally represented bundle of rays incident at the surface of the ring-shaped structure. The surface power of the ring-shaped structure preferably is analogously as in note 1 to the entry in ISO 13666:2019(E), section 3.10.4, determined from a radius or radii of the surface of the ring-shaped structure and a refractive index of a material of the ring-shaped structure, and is calculated for digitally represented light incident or emergent in air. The refractive index may be an actual refractive index of a material of the ring-shaped structure or a nominal value. The refractive index of the material of the ring-shaped structure preferably is assumed to be a same as a refractive index of an optical material of a digital twin of a spectacle lens.
The surface power of a lens surface of the digital twin of the spectacle lens shall be defined analogously as in ISO 13666:2019(E), entry 3.10.4 (surface power), as a local ability of the lens surface of a digital twin of a spectacle lens to change the calculated vergence of a digitally represented bundle of rays incident at the lens surface. The surface power of the lens surface is analogously as in note 1 to the entry in ISO 13666:2019(E), entry 3.10.4, determined from a radius or radii of the lens surface of the digital twin of the spectacle lens and a refractive index of an optical material of the digital twin of the spectacle lens, and is calculated for digitally represented light incident or emergent in air. The refractive index may be an actual refractive index of the optical material of the digital twin of the spectacle lens or a nominal value.
A ring-shaped structure of a spectacle lens results from transferring a digital twin of a spectacle lens comprising said ring-shaped structure to physical reality, by manufacturing said spectacle lens. More or “a plurality of ring-shaped structures of a digital twin of a spectacle lens” is a mathematical description of a surface of each ring-shaped structure of said more or said plurality of ring-shaped structures, each mathematical description not considering a mathematical description of a lens surface of the digital twin of the spectacle lens comprising the more or the plurality of ring-shaped structures. For characterizing the more or the plurality of ring-shaped structures and not the lens surface of the digital twin of the spectacle lens comprising the more or the plurality of ring-shaped structures, the mathematical description of the lens surface comprising the more or the plurality of ring-shaped structures is a separate mathematical description from the mathematical description of each surface of the more or the plurality of ring-shaped structures themselves. Each surface of the more or the plurality of ring-shaped structures and the lens surface of the digital twin of the spectacle lens comprising the more or the plurality of ring-shaped structures are mathematically described piecewise. Each surface of the more orthe plurality of ring-shaped structures of the digital twin of the spectacle lens may be selected from at least one of the following surfaces or may be pieced together from parts of at least one of the following surfaces:
- a part of a spherical surface, a spherical surface as defined in ISO 13666:2019(E), section 3.4.1 ;
- a cylindrical surface as defined in ISO 13666:2019(E), section 3.4.2;
- a part of a cylindrical surface;
- a part of an aspherical surface, an aspherical surface as defined in ISO 13666:2019(E), section 3.4.3;
- a part of a toroidal surface, a toroidal surface as defined in ISO 13666:2019(E), section 3.4.6;
- a part of an atoroidal surface, an atoroidal surface as defined in ISO 13666:2019(E), section 3.4.7;
- a power-variation surface defined analogously as in ISO 13666:2019(E), section 3.4.10;
- a part of a power-variation surface.
The surfaces of the more or the plurality of ring-shaped structures of the digital twin of the spectacle lens each may be selected from a same surface, e.g., a same surface of the before mentioned, or may be pieced together from parts of a same surface, e.g., parts of a same surface of the before mentioned. Alternatively, each surface of the more orthe plurality of ring-shaped structures of the digital twin of the spectacle lens may be different to one another, e.g., said different surfaces may be selected from the before mentioned, or may be pieced together from parts of different surfaces, e.g., parts of different surfaces of the before mentioned. Alternatively, at least one surface of the more or the plurality of ring-shaped structures of the digital twin of the spectacle lens may be different to other surfaces of the more or the plurality of ring-shaped structures, e.g., each of said surfaces may be selected from the before mentioned or pieced together from parts of the before mentioned such that at least one surface is different from the other surfaces of the more or the plurality of ring-shaped structures.
Each ring-shaped structure of the more or the plurality of ring-shaped structures of the digital twin of the spectacle lens has a surface power which is different to a surface power of a lens surface of the digital twin of the spectacle lens comprising the more or the plurality of ring-shaped structures outside each domain occupied by each ring-shaped structure of the more or the plurality of ring-shaped structures. The surface power of each ring-shaped structure of the more or the plurality of ring-shaped structures shall be defined analogously as in ISO 13666:2019(E), section 3.10.4 (surface power), as a local ability of each surface of the more or the plurality of ring-shaped structures to change the calculated vergence of a digitally represented bundle of rays incident at each surface of the more or the plurality of ring-shaped structures. The surface power of the more or the plurality of ring-shaped structures preferably is analogously as in note 1 to the entry in ISO 13666:2019(E), section 3.10.4, determined from a radius or radii of each surface of the more or the plurality of ring-shaped structures and a refractive index of a material of each ring-shaped structure, and is calculated for digitally represented light incident or emergent in air. The refractive index may be an actual refractive index of a material of each ring-shaped structure or a nominal value. The refractive index of the material of each ring-shaped structure preferably is assumed to be a same as a refractive index of an optical material of a digital twin of a spectacle lens. The surface power of a lens surface of the digital twin of the spectacle lens shall be defined analogously as in ISO 13666:2019(E), section 3.10.4 (surface power).
More or the plurality of ring-shaped structures of the spectacle lens results from transferring a digital twin of a spectacle lens comprising the more or the pluratliy of ring-shaped structures in physical reality, by manufacturing said spectacle lens.
“A ring-shaped diffusing structure of a digital twin of a spectacle lens” constitute an optical element that is made of any material that diffuses or scatters light in some manner to transmit soft light. Diffuse light can be easily obtained by reflecting light from a white surface, while more compact diffusing structures may use translucent material, including ground glass, Teflon, holographs, opal glass, and greyed glass. A ring-shaped diffusing structure may be regarded as a ring-shaped light modulating cell, preferably within a lens surface of said digital twin, said light modulating cell diffusing light as disclosed for example in WO 2020/261213 A1 or as one ring-shaped scattering centre, preferably within a lens surface of said digital twin, said scattering centre as disclosed for example in WO 2020/180817 A1 or in WO 2022/251713 A1 .
A ring-shaped diffusing structure of the spectacle lens results from transferring of a digital twin of a spectacle lens comprising said ring-shaped diffusing structure in physical reality, by manufacturing said spectacle lens.
More or ‘‘a plurality of ring-shaped diffusing structures of a digital twin of a spectacle lens” may be regarded as more than one of the before mentioned ring-shaped diffusing structures.
More or a plurality of ring-shaped diffusing structures of a spectacle lens result(s) from transferring of a digital twin of a spectacle lens comprising said more or said plurality of ring-shaped diffusing structure in physical reality, by manufacturing said spectacle lens.
A ‘‘lens surface of a digital twin of a spectacle lens” is a mathematical description of a front surface of the digital twin of the spectacle lens or a mathematical description of a back surface of the digital twin of the spectacle lens. The mathematical description of the front surface and the mathematical description of the back surface are piecewise mathematical descriptions, not considering a piecewise mathematical description of a ring-shaped structure, a ring-shaped diffusing structure, or of each ringshaped structure of more or a plurality of ring-shaped structures or each ring-shaped diffusing structure of more or a plurality of ring-shaped diffusing structures. The lens surface of the front surface and/or the lens surface of the back surface of the digital twin of the spectacle lens each is as defined in ISO 13666:2019(E), section 3.4 or is defined analogously as in ISO 13666:2019(E), section 3.4.
The lens surface may be formed as one of the following:
- as a spherical surface as defined in ISO 13666:2019(E), section 3.4.1 ,
- as a cylindrical surface as defined in ISO 13666:2019(E), section 3.4.2,
- as an aspherical surface as defined in ISO 13666:2019(E), section 3.4.3,
- as a toroidal surface as defined in ISO 13666:2019(E), section 3.4.6,
- as an atoroidal surface as defined in ISO 13666:2019(E), section 3.4.7,
- as a power-variation surface defined analogously as in ISO 13666:2019(E), section 3.4.10.
The lens surface of the front surface and the lens surface of the back surface of the digital twin of the spectacle lens may be formed of a same lens surface or of a different lens surface.
A lens surface of the spectacle lens results from a transfer of a lens surface of a digital twin of the spectacle lens in physical reality, by manufacturing the spectacle lens.
“One ring-shaped diffractive structure of a digital twin of a spectacle lens” may have a diffractive surface described for example in EP 3 561 578 A1 , paragraphs [0177] to [0180], or in WO 2020/261213 A1 , paragraph [00108],
One ring-shaped diffractive structure of the spectacle lens results from transferring a digital twin of a spectacle lens comprising said one ring-shaped diffractive structure in physical reality, by manufacturing said spectacle lens.
“More ring-shaped diffractive structures of a digital twin of a spectacle lens” comprise more than one ring-shaped diffractive structures as described before.
More ring-shaped diffractive structures of the spectacle lens result from transferring a digital twin of a spectacle lens comprising said more ring-shaped diffractive structures in physical reality, by manufacturing said spectacle lens.
“One ring-shaped structure having a variable surface power on a digital twin of a spectacle lens" shall comprise that a surface power of said one ring-shaped structure, the surface power defined analogously as in ISO 13666:2019(E), section 3.10.4, along a circumferential direction of said one ring-shaped structure is not uniform. Alternatively, one ring-shaped structure having a variable surface power shall mean that a surface power of said one ring-shaped structure along a direction perpendicular to a tangential direction is not uniform.
One ring-shaped structure having a variable surface power on a spectacle lens results from transferring a digital twin of a spectacle lens comprising said one ring-shaped structure having a variable surface power in physical reality, by manufacturing said spectacle lens.
“More ring-shaped structures each having a variable surface power on a digital twin of a spectacle lens” shall comprise that a surface power of each ring-shaped structure of said more ring-shaped structures, the surface power defined analogously as in ISO 13666:2019(E), section 3.10.4, along a circumferential direction of each ring-shaped structure is not uniform. Alternatively, more ring-shaped structures having a variable surface power shall mean that a surface power of each ring-shaped structure of said more ring-shaped structures along a direction perpendicular to a tangential direction is not uniform.
More ring-shaped structures each having a variable surface power on a spectacle lens results from transferring a digital twin of a spectacle lens comprising said more ring-shaped structures each having a variable surface power in physical reality, by manufacturing said spectacle lens.
“One ring-shaped structure having a variable width on a digital twin of a spectacle lens” shall comprise the definition provided before for one ring-shaped structure. A “variable width of one ring-shaped structure” designates a variable expansion of said one ring-shaped structure along different directions perpendicular to a circumferential direction as determined between onsets, i.e., an inner and an outer onset, of said one ring-shaped structure. An onset of one ring-shaped structure represents an inner onset, i.e., a first position and an outer onset, i.e., a last position in which a surface, preferably in the sense of surface shape, form or topography, of said one ring-shaped structure deviates from a surface of a lens surface of a digital twin of a spectacle lens comprising said one ring-shaped structure, along the respective direction of the variable width of said ring-shaped structure.
A variable width of one ring-shaped structure may alternatively comprise that in each tangential direction or in different tangential directions an expansion of said one ring-shaped structure limited by an inner onset and an outer onset is of a different width. A tangential direction shall be any direction from an optical centre or a fitting point of the digital twin of a spectacle lens radially outwards.
One ring-shaped structure having a variable width on a spectacle lens results from transferring a digital twin of a spectacle lens comprising one ring-shaped structure having a variable width in physical reality, by manufacturing said spectacle lens. The definition given before with respect to one ring-shaped structure of a spectacle lens shall apply accordingly.
“More ring-shaped structures each having a variable width on a digital twin of a spectacle lens shall comprise the definition provided before with respect to more ring-shaped structures of a digital twin of a spectacle lens. A “variable width of more ring-shaped structures” designates a variable expansion of each of said more ring-shaped structures along a perpendicular direction to their respective circumferential direction as determined between respective onsets, i.e., a respective inner onset and a respective outer onset, of each ring-shaped structure of said more ring-shaped structures. A “respective onset of each of said more ring-shaped structures” represents each inner onset of each ring-shaped structure of said more ring-shaped structures, i.e., each first position and each outer onset of each ring-shaped structure of said more ring-shaped structures, i.e., each last position in which a surface of said one ring-shaped structure deviates from a surface, surface preferably in the sense of surface shape, form or topography, of a lens surface of a digital twin of a spectacle lens, each comprising said more ring-shaped structure, along the direction of the respective variable widths of each ring-shaped structure of said more ring-shaped structures. A variable width of each ringshaped structure of said more ring-shaped structures may alternatively comprise that in each tangential direction or in different tangential directions an expansion of each ring-shaped structure of said more ring-shaped structures limited by a respective inner onset and a respective outer onset is of a different width. A tangential direction shall be any direction from an optical centre or a fitting point of the digital twin of the spectacle lens radially outwards.
More ring-shaped structures each having a variable width on a spectacle lens result from transferring a digital twin of a spectacle lens comprising said more ring-shaped structures each having a variable width in physical reality, by manufacturing said spectacle lens. The definition provided before with respect to more ring-shaped structures of a spectacle lens shall apply accordingly.
“One ring-shaped diffusing structure having a variable width on a digital twin of a spectacle lens” shall comprise the definition provided before for one ring-shaped diffusing structure. A variable width of one ring-shaped diffusing structure designates a variable expansion of said one ring-shaped diffusing structure along different directions perpendicular to a circumferential direction as determined between onsets, i.e., an inner and an outer onset, of said one ring-shaped diffusing structure. An onset of one ring-shaped diffusing structure represents an inner onset, i.e., a first position and an outer onset, i.e., a last position in which said one ring-shaped diffusing structure changes a calculated transmission of a digital twin of a spectacle lens along the respective direction of the variable width of said one ringshaped diffusing structure.
A variable width of one ring-shaped diffusing structure may alternatively comprise that in each tangential direction or in different tangential directions an expansion of said one ring-shaped diffusing structure limited by an inner onset and an outer onset is of a different width. A tangential direction shall be any direction from an optical centre or a fitting point of the digital twin of a spectacle lens radially outwards.
One ring-shaped diffusing structure having a variable width on the spectacle lens results from transferring a digital twin of a spectacle lens comprising one ring-shaped diffusing structure having a variable width in physical reality, by manufacturing said spectacle lens. The definition given before with respect to one ring-shaped diffusing structure of a spectacle lens shall apply accordingly.
“More ring-shaped diffusing structures each having a variable width on a digital twin of a spectacle lens” shall comprise the definition provided before with respect to more ring-shaped diffusing structures of a digital twin of a spectacle lens. A variable width of more ring-shaped diffusing structures designates a variable expansion of each of said more ring-shaped diffusing structures along a perpendicular direction to their respective circumferential direction as determined between respective onsets, i.e., a respective inner onset and a respective outer onset, of each ring-shaped diffusing structure of said more ring-shaped diffusing structures. A respective onset of each ringshaped diffusing structure of said more ring-shaped diffusing structures represents each inner onset of each ring-shaped diffusing structure of said more ring-shaped diffusing structures, i.e., each first position and each outer onset of each ring-shaped diffusing structure of said more ring-shaped diffusing structures, i.e., each last position in which said one ring-shaped diffusing structure changes a calculated transmission of a digital twin of a spectacle lens along the respective direction of the variable width of each ring-shaped diffusing structure of said more ring-shaped diffusing structures. A variable width of each ring-shaped diffusing structure of said more ring-shaped diffusing structures may alternatively comprise that in each tangential direction or in different tangential directions an expansion of each ring-shaped diffusing structure of said more ring-shaped diffusing structures limited by a respective inner onset and a respective outer onset is of a different width. A tangential direction shall be any direction from an optical centre or a fitting point of the digital twin of the spectacle lens radially outwards.
More ring-shaped diffusing structures each having a variable width on a spectacle lens result from transferring a digital twin of a spectacle lens comprising said more ring-shaped diffusing structures each having a variable width in physical reality, by manufacturing said spectacle lens. The definition provided before with respect to more ring-shaped diffusing structures of a spectacle lens shall apply accordingly.
With respect to definitions and further explanations reference is also made to the before with respect to the spectacle lens provided ones.
The above-described problem is fully solved by a method being configured for calculating by a computer a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens described in the forgoing. Since the method for calculating said digital twin is addressing children as main intended wearers of a respective spectacle lens, a higher level of comfort and wearability is desirable to prevent the children from removing the spectacle lens. Apart from the before mentioned, a key benefit of the method described in the foregoing is that the at least one different structure disrupting a pattern created by at least one of the plurality of ring-shaped structures and the plurality of diffusing structures by replacing a respective ring-shaped structure or a respective ring-shaped diffusing structure or by adding at least one different structure to a respective pattern prevents the wearer of a spectacle lens, calculated by the method and transferred to physical reality from the respective digital twin thereof, from habituation to such a pattern.
In a preferred embodiment of the invention, the method is characterized in that said central zone width being within a range of 6 mm to 9.4 mm.
Reference is made to the before-given explanation of said range.
In a preferred embodiment of the invention, the method is characterized in that said surface-based fill factor is selected from at least one surface-based fill factor of the group consisting of:
- larger than 17 % and equal to or lower than 70 % for said uniform width of each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being in a range of 0.6 mm to 0.7 mm, or
- larger than 15 % and equal to or lower than 60 % for said uniform width of each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being in a range of 0.5 mm to 0.6 mm, or
- larger than 6 % and equal to or lower than 50 % for said uniform width of each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being lower than 0.5 mm. Reference is made to the before given definition of the surface-based fill which shall also apply here.
The computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens may comprise the step of
- determining a central zone such as to comprise an optical centre or a fitting point of said digital twin, said optical centre defined analogously as in ISO 13666:2019(E), section 3.2.15, said fitting point defined analogously as in ISO 13666:2019(E), section 3.2.34.
In a preferred embodiment of the invention, the method is characterized in that said central zone comprises an optical centre or a fitting point of said digital twin, said optical central defined analogously as in ISO 13666:2019(E), section 3.2.15, said fitting point defined analogously as in ISO 13666:2019(E), section 3.2.34.
The computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens comprises the step of
- determining a uniform width of at least one of the group consisting of one ring-shaped structure, more ring-shaped structures, preferably each ring-shaped structure of said more ring-shaped structures, one ring-shaped diffusing structure and more ring-shaped diffusing structures, preferably each ring-shaped diffusing structure of said more ring-shaped diffusing structures such as to be set within at least one range of the following group of ranges:
(i) said uniform width is larger than 0.2 mm and equal to or lower than 0.7 mm;
(II) said uniform width is larger than 0.3 mm and equal to or lower than 0.7 mm;
(iii) said uniform width is equal or lower than 0.6 mm;
(iv) said uniform width is larger than 0.2 mm and equal to or lower than 0.6 mm;
(v) said uniform width is larger than 0.3 mm and equal to or lower than 0.6 mm;
(vi) said uniform width is equal or lower than 0.5 mm;
(vii) said uniform width is larger than 0.2 mm and equal to or lower than 0.5 mm;
(viii) said uniform width is larger than 0.3 mm and equal to or lower than 0.5 mm.
In a preferred embodiment of the invention, the method is csaid uniform width is within at least one range of the following group of ranges:
(i) said uniform width is larger than 0.2 mm and equal to or lower than 0.7 mm;
(ii) said uniform width is larger than 0.3 mm and equal to or lower than 0.7 mm;
(iii) said uniform width is equal to or lower than 0.6 mm;
(iv) said uniform width is larger than 0.2 mm and equal to or lower than 0.6 mm;
(v) said uniform width is larger than 0.3 mm and equal to or lower than 0.6 mm;
(vi) said uniform width is equal to or lower than 0.5 mm;
(vii) said uniform width is larger than 0.2 mm and equal to or lower than 0.5 mm;
(viii) said uniform width is larger than 0.3 mm and equal to or lower than 0.5 mm. The before mentioned and with respect to the spectacle lens provided definitions and explanations shall apply accordingly.
The computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens may comprise the step of
- determining a central zone width such as to be set within at least one range of the following group of ranges:
(i) said central zone width is larger than 6 mm and lower than or equal to 7 mm;
(ii) said central zone width is larger than 7 mm and lower than or equal to 9.4 mm.
In a preferred embodiment of the invention, the method is characterized in that said central zone width is within at least one range of the following group of ranges:
(i) said central zone width is larger than 6 mm and lower than or equal to 7 mm;
(ii) said central zone width is larger than 7 mm and lower than or equal to 9.4 mm.
The before mentioned and with respect to the spectacle lens provided definitions and explanations shall apply accordingly.
The computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens comprises the step of
- determining a surface of a ring-shaped structure or determining each surface of said more or said plurality of ring-shaped structures such that each has a surface power which is different to a surface power of a lens surface comprising said more or said plurality of ring-shaped structures outside a domain occupied by each ring-shaped structure of said more or said plurality of ring-shaped structures, a difference in surface power being within at least one range of the following group of ranges:
A) a difference in surface power being within a range of larger than 6 dioptres and equal or lower than 12 dioptres;
B) a difference in surface power being within a range of larger than 7 dioptres and equal or lower than 11 dioptres;
C) a difference in surface power being within a range of larger than 8 dioptres and equal or lower than 10 dioptres.
In a preferred embodiment of the invention, the method is characterized in that a difference of said surface power of each ring-shaped structure to said surface power of said lens surface comprising said plurality of ring-shaped structures outside a domain occupied by each ring-shaped structure of said plurality of ring-shaped structures is within at least one range of the following group of ranges:
A) a difference in surface power being within a range of larger than 6 dioptres and equal to or lower than 12 dioptres;
B) a difference in surface power being within a range of larger than 7 dioptres and equal to or lower than 11 dioptres; C) a difference in surface power being within a range of larger than 8 dioptres and equal to or lower than 10 dioptres.
The before mentioned and with respect to the spectacle lens provided definitions and explanations shall apply accordingly.
The computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens may comprise the step of
- determining said variable width of at least one of the group consisting of said one ring-shaped structure having a variable width, said more ring-shaped structures each having a variable width, said one ring-shaped diffusing structure having a variable width, and said more ring-shaped diffusing structures each having a variable width such as to vary within at least one range of the following group of ranges:
(i) said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.7 mm;
(ii) said variable width varies in a range of larger than 0.3 mm and equal or lower than 0.7 mm;
(iii)said variable width varies in a range of lower than 0.6 mm;
(iv)said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.6 mm;
(v) said variable width varies in a range of larger than 0.3 mm and equal or lower than 0.6 mm;
(vi)said variable width varies in a range of lower than 0.5 mm;
(vii) said variable width varies in a range of larger than 0.2 mm and equal or lower than 0.5 mm; (viii) said variable width varied in a range of larger than 0.3 mm and equal or lower than 0.5 mm.
In a preferred embodiment of the invention, the method is characterized in that said variable width varies within at least one range of the following group of ranges:
(i) said variable width varies in a range of larger than 0.2 mm and equal to or lower than 0.7 mm;
(II) said variable width varies in a range of larger than 0.3 mm and equal to or lower than 0.7 mm;
(iii) said variable width varies in a range of lower than 0.6 mm;
(iv) said variable width varies in a range of larger than 0.2 mm and equal to or lower than 0.6 mm;
(v) said variable width varies in a range of larger than 0.3 mm and equal to or lower than 0.6 mm;
(vi) said variable width varies in a range of lower than 0.5 mm;
(vii) said variable width varies in a range of larger than 0.2 mm and equal to or lower than 0.5 mm;
(viii) said variable width varies in a range of larger than 0.3 mm and equal to or lower than 0.5 mm.
The before mentioned and with respect to the spectacle lens provided definitions and explanations shall apply accordingly.
The computer-implemented method for calculating a digital twin of a spectacle lens for the purpose of manufacturing the spectacle lens may comprise the step of
- determining a variable surface power for said one ring-shaped structure having a variable surface power or for each of said more ring-shaped structures having a variable surface power such that the variable surface power is different to a surface power of a lens surface comprising said one or more ring-shaped structure(s) having said variable surface power outside a domain occupied by said one or more ring-shaped structure(s) having said variable surface power, varying within at least one range of the following group of ranges:
A) a difference in surface power varying within a range of larger than 6 dioptres and equal or lower than 12 dioptres;
B) a difference in surface power varying within a range of larger than 7 dioptres and equal or lower than 11 dioptres;
C) a difference in surface power varying within a range of larger than 8 dioptres and equal or lower than 10 dioptres.
In a preferred embodiment of the invention, the method is characterized in that each of said one ringshaped structure having a variable surface power or each ring-shaped structure of said more ringshaped structures each having a variable surface power has said variable surface power which is different to said surface power of said lens surface comprising said one or more ring-shaped structure(s) having said variable surface power outside a domain occupied by said one ring-shaped structure or by each each ring-shaped structure of said more ring-shaped structures each having said variable surface power, said variable surface power varying within at least one range of the following group of ranges:
A) a difference in surface power varying within a range of larger than 6 dioptres and equal to or lower than 12 dioptres;
B) a difference in surface power varying within a range of larger than 7 dioptres and equal to or lower than 11 dioptres;
C) a difference in surface power varying within a range of larger than 8 dioptres and equal to or lower than 10 dioptres.
The before mentioned and with respect to the spectacle lens provided definitions and explanations shall apply accordingly.
In a preferred embodiment of the invention, the method is further configured for manufacturing a spectacle lens based on the digital twin of the spectacle lens calculated by the method described before.
In a preferred embodiment of the invention, a computer comprising a processor is configured to perform the before described method.
In a preferred embodiment of the invention, a data processing system comprises a processor and a storage medium coupled to the processor, wherein the processor is adapted to perform the before described method based on a computer program stored on the storage medium. Said computer program may be stored on a non-transitory tangible computer-readable storage medium, the computer program comprising instructions which, when the program is executed by a computer, cause the computer to carry out the method described before.
In a preferred embodiment of the invention, a computer program comprises instructions which, when the program is executed by a computer, cause the computer to carry out the before described method. Said computer program may be stored on a non-transitory tangible computer-readable storage medium, the computer program comprising instructions which, when the program is executed by a computer, cause the computer to carry out the above-described method.
In a preferred embodiment of the invention, a computer-readable medium having stored thereon said computer program. Said computer-readable storage medium may be a non-transitory tangible computer-readable storage medium.
In a preferred embodiment of the invention, a computer-readable medium comprises instructions which, when executed by a computer, cause the computer to carry out the before described computer- implemented method. Said computer-readable storage medium may be a non-transitory tangible computer-readable storage medium.
In a preferred embodiment of the invention, a computer-readable data carrier having stored thereon the before mentioned computer program.
In a preferred embodiment of the invention, a data carrier signal is carrying the before mentioned computer program.
The data set according to the invention comprises the following kinds of data: i) a digital twin of the spectacle lens as described before, said digital twin being configured for the purpose of use for a manufacture of the spectacle lens as described before, and ii) data containing computer-readable instructions for controlling one or more manufacturing machines in order to produce the spectacle lens as described before.
A digital twin of the spectacle lens being configured for the purpose of a use of the digital twin for manufacturing the spectacle lens, said digital twin comprises a central zone having a central zone width within a range of 6 mm to 9.4 mm, and at least one of
- a plurality of ring-shaped structures,
- a plurality of ring-shaped diffusing structures, each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of diffusing structures having a respective uniform width, said uniform width being equal to or lower than 0.7 mm, each ring-shaped structure of said plurality of ring-shaped structures having a surface power which is different to a surface power of a lens surface of said digital twin of said spectacle lens comprising said plurality of ring-shaped structures outside a domain occupied by each ring-shaped structure of said plurality of ring-shaped structures, said spectacle lens having a surface-based fill factor defined as a surface area ratio of a surface area of an innermost ring-shaped structure of said plurality of ring-shaped structures or of an innermost ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures and a sum of said surface area of said innermost ring-shaped structure of said plurality of ring-shaped structures or said innermost ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures and a surface area of a peripheral zone, said surface-based fill factor being at least one of
- larger than 17 % and equal to or lower than 70 % for said uniform width of each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being in a range of 0.6 mm to 0.7 mm;
- larger than 15 % and equal to or lower than 60 % for said uniform width of each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being in a range of 0.5 mm to 0.6 mm;
- larger than 6 % and equal to or lower than 50 % for said uniform width of each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being lower than 0.5 mm; said digital tiwn of said spectacle lens being characterized in comprising at least one feature of the following group of features outside said central zone:
- one ring-shaped diffractive structure or more ring-shaped diffractive structures,
- one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power,
- one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width,
- one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width.
Alternatively, the digital twin of the spectacle lens being configured for the purpose of a use of the digital twin for manufacturing the spectacle lens, said digital twin comprises a central zone having a central zone width within a range of 6 mm to 9.4 mm, and at least one of
- a plurality of ring-shaped structures,
- a plurality of ring-shaped diffusing structures, each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures having a respective uniform width, said uniform width being equal to or lower than 0.7 mm, each ring-shaped structure of said plurality of ring-shaped structures having a surface power which is different to a surface power of a lens surface of said digital twin of said spectacle lens comprising said plurality of ring-shaped structures outside a domain occupied by each ring-shaped structure of said plurality of ring-shaped structures, said digital tiwn of said spectacle lens being characterized in comprising at least one feature of the following group of features outside said central zone:
- one ring-shaped diffractive structure or more ring-shaped diffractive structures, each ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures having a uniform width equal to or lower than 0.7 mm,
- one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power, each ring-shaped structure having a variable surface power of said one ring-shaped structure having a variable surface power or said more ring-shaped structures each having a variable surface power having a uniform width equal to or lower than 0.7 mm,
- one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width,
- one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width, and in having a surface-based fill factor defined as a surface area ratio of a surface area of an innermost structure, said innermost structure being ring-shaped, said innermost structure being selected from one of the group consisting of a ring-shaped structure of said plurality of ring-shaped structures, a ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures, a ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures, a ring-shaped structure having said variable surface power of said one ring-shaped structure having said variable surface power or said more ring-shaped structures each having said variable surface power, a ring-shaped structure having said variable width of said one ring-shaped structure having said variable width or said more ring-shaped structures each having said variable width, and a ring-shaped diffusing structure having said variable width of said one ring-shaped diffusing structure having said variable width or said more ring-shaped diffusing structures each having said variable width, and a sum of said surface area of said innermost structure and a surface area of a peripheral zone, said surface-based fill factor being at least one of
- larger than 17 % and equal to or lower than 70 % for said uniform width of each structure being in a range of 0.6 mm to 0.7 mm,
- larger than 15 % and equal to or lower than 60 % for said uniform width of each structure being in a range of 0.5 mm to 0.6 mm,
- larger than 6 % and equal to or lower than 50 % for said uniform width of each structure being lower than 0.5 mm, each structure being ring-shaped, each structure being selected from at least one of the group consisting of said ring-shaped structure, said ring-shaped diffusing structure, said ring-shaped diffractive structure, said ring-shaped structure having said variable surface power, or said surface-based fill factor being at least one of
- larger than 17% and equal to or lower than 70% for said variable width of each structure varying in a range of 0.6 mm to 0.7 mm,
- larger than 15 % and equal to or lower than 60 % for said variable width of each structure varying in a range of 0.5 mm to 0.6 mm,
- larger than 6 % and equal to or lower than 50 % for said variable width of each structure being lower than 0.5 mm along each structure, each structure being ring-shaped, each structure being selected from at least one of the group consisting of said ring-shaped structure having said variable width and said ring-shaped diffusing structure having said variable width. The digital twin of the spectacle lens being configured for the purpose of a use of the digital twin for manufacturing the spectacle lens, said digital twin lens is characterized in that the surface-based fill factor is at least one of
- larger than 17 % and equal to or lower than 70 % for said uniform width of each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being in a range of 0.6 mm to 0.7 mm;
- larger than 17% and equal to or lower than 70% for said uniform width of each ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures or each ring-shaped structure having a variable surface power of said one ring-shaped structure having said variable surface power or said more ring-shaped structures each having said variable surface power, said uniform width being in a range of 0.6 mm to 0.7 mm;
- larger than 17% and equal to or lower than 70% for said variable width of each ring-shaped structure having a variable width of said one ring-shaped structure having said variable width or said more ring-shaped structures each having said variable width or each ring-shaped diffusing structure having a variable width of said one ring-shaped diffusing structure having said variable width or said more ring-shaped diffusing structures each having said variable width, said variable width varying in a range of 0.6 mm to 0.7 mm;
- larger than 15 % and equal to or lower than 60 % for said uniform width of each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being in a range of 0.5 mm to 0.6 mm;
- larger than 15 % and equal to or lower than 60 % for said uniform width of each ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures or each ring-shaped structure having a variable surface power of said one ring-shaped structure having said variable surface power or said more ring-shaped structures each having said variable surface power, said uniform width being in a range of 0.5 mm to 0.6 mm;
- larger than 15 % and equal to or lower than 60 % for said variable width of each ring-shaped structure having a variable width of said one ring-shaped structure having said variable width or said more ring-shaped structures each having said variable width or each ring-shaped diffusing structure having a variable width of said one ring-shaped diffusing structure having said variable width or said more ring-shaped diffusing structures each having said variable width, said variable width varying in a range of 0.5 mm to 0.6 mm;
- larger than 6 % and equal to or lower than 50 % for said uniform width of each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures being lower than 0.5 mm;
- larger than 6 % and equal to or lower than 50 % for said uniform width of each ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures or each ring-shaped structure having a variable surface power of said one ring-shaped structure having said variable surface power or said more ring-shaped structures each having said variable surface power, said uniform width being lower than 0.5 mm;
- larger than 6 % and equal to or lower than 50 % for said variable width of each ring-shaped structure having a variable width of said one ring-shaped structure having said variable width or said more ring-shaped structures each having said variable width or each ring-shaped diffusing structure having a variable width of said one ring-shaped diffusing structure having said variable width or said more ring-shaped diffusing structures each having said variable width, said variable width being lower than 0.5 mm along each ring-shaped structure having said variable width.
Alternatively, the digital twin of the spectacle lens being configured for the purpose of a use of the digital twin for manufacturing the spectacle lens, said digital twin comprises a central zone having a central zone width within a range of 6 mm to 9.4 mm, and at least one of
- a plurality of ring-shaped structures,
- a plurality of ring-shaped diffusing structures, each ring-shaped structure of said plurality of ring-shaped structures or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures having a respective uniform width, said uniform width, each ring-shaped structure of said plurality of ring-shaped structures having a surface power which is different to a surface power of a lens surface of said digital twin of said spectacle lens comprising said plurality of ring-shaped structures outside a domain occupied by each ring-shaped structure of said plurality of ring-shaped structures, said spectacle lens being characterized in comprising at least one feature of the following group of features outside said central zone:
- one ring-shaped diffractive structure or more ring-shaped diffractive structures,
- one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power,
- one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width,
- one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width.
The before given definitions and explanations shall apply accordingly with respect to said digital twin of the lens. The above-described problem is fully solved by a digital twin of the spectacle lens described in the forgoing. Since the intended wearers of said spectacle lens are children, a higher level of comfort and wearability prevent the children from removing the spectacle lens. Apart from that, the digital twinb spectacle lens described in the foregoing having at least one structure selected from a ring-shaped structure, a ring-shaped diffusing structure, a ring-shaped diffractive structure, a ringshaped structure having said variable surface power, a ring-shaped structure having said variable width, and a ring-shaped diffusing structure having said variable width, the at least one structure disrupting a pattern created by at least one of the plurality of ring-shaped structures and the plurality of ring-shaped diffusing structures prevents the wearer of a spectacle lens, resulting from a transfer of said digital twin to physical reality, from habituation to such a pattern. The digital twin of the spectacle lens is characterized in that the central zone comprises an optical centre or a fitting point of said spectacle lens, the optical centre as defined in ISO 13666:2019(E), section 3.2.15, the fitting point as defined in ISO 13666:2019(E), section 3.2.34.
The digital twin of the spectacle lens is characterized in that the uniform width of at least one of the group selected from each ring-shaped structure of said plurality of ring-shaped structures, and each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures each is within at least one range of the following group of ranges:
(i) said uniform width is larger than 0.2 mm and equal to or lower than 0.7 mm;
(ii) said uniform width is larger than 0.3 mm and equal to or lower than 0.7 mm;
(iii) said uniform width is equal to or lower than 0.6 mm;
(iv) said uniform width is larger than 0.2 mm and equal to or lower than 0.6 mm;
(v) said uniform width is larger than 0.3 mm and equal to or lower than 0.6 mm;
(vi) said uniform width is equal to or lower than 0.5 mm;
(vii) said uniform width is larger than 0.2 mm and equal to or lower than 0.5 mm;
(viii) said uniform width is larger than 0.3 mm and equal to or lower than 0.5 mm.
The before given definitions and explanations shall apply accordingly.
The digital twin of the spectacle lens is characterized in that the central zone width is within at least one range of the following group of ranges:
(i) said central zone width (cw110, cw210, cw310, ...) is larger than 6 mm and lower than or equal to 7 mm;
(ii) said central zone width (cw110, cw210, cw310, ...) is larger than 7 mm and lower than or equal to 9.4 mm.
The before given definitions and explanations shall apply accordingly.
The digital twin of the spectacle lens is characterized in that a difference of the surface power of each ring-shaped structure of said plurality of ring-shaped structures to the surface power of the lens surface comprising said plurality of ring-shaped structures outside the domain occupied by each ringshaped structure of said plurality of ring-shaped structures, is within at least one range of the following group of ranges:
A) the difference in surface power being within a range of larger than 6 dioptres and equal to or lower than 12 dioptres;
B) the difference in surface power being within a range of larger than 7 dioptres and equal to or lower than 11 dioptres;
C) the difference in surface power being within a range of larger than 8 dioptres and equal to or lower than 10 dioptres.
The before given definitions and explanations shall apply accordingly.
The digital twin of the spectacle lens is characterized in that the variable width of at least one of the group consisting of said one ring-shaped structure having a variable width, each ring-shaped structure of said more ring-shaped structures each having a variable width, said one ring-shaped diffusing structure having a variable width and each ring-shaped diffusing structure of said more ring-shaped diffusing structures each having a variable width, varies within at least one range of the following group of ranges:
(i) said variable width varies in a range of larger than 0.2 mm and equal to or lower than 0.7 mm;
(ii) said variable width varies in a range of larger than 0.3 mm and equal to or lower than 0.7 mm;
(iii) said variable width varies in a range of lower than 0.6 mm;
(iv) said variable width varies in a range of larger than 0.2 mm and equal to or lower than 0.6 mm;
(v) said variable width varies in a range of larger than 0.3 mm and equal to or lower than 0.6 mm;
(vi) said variable width varies in a range of lower than 0.5 mm;
(vii) said variable width varies in a range of larger than 0.2 mm and equal to or lower than 0.5 mm;
(viii) said variable width varies in a range of larger than 0.3 mm and equal to or lower than 0.5 mm.
The before given definitions and explanations shall apply accordingly.
The digital twin of the spectacle lens is characterized in that each of said one ring-shaped structure having the variable surface power or each ring-shaped structure of said more ring-shaped structures having the variable surface power provides the variable surface power to said spectacle lens which is different to the surface power of the lens surface comprising said one or more ring-shaped structure(s) each having said variable surface power outside a domain occupied by said one ring-shaped structure or each ring-shaped structure of said more ring-shaped structures each having said variable surface power, said variable surface power varying within at least one range of the following group of ranges:
A) a difference in surface power varying within a range of larger than 6 dioptres and equal to or lower than 12 dioptres;
B) a difference in surface power varying within a range of larger than 7 dioptres and equal to or lower than 11 dioptres;
C) a difference in surface power varying within a range of larger than 8 dioptres and equal to or lower than 10 dioptres.
The before given definitions and explanations shall apply accordingly.
The invention will be disclosed exemplarily in the following with reference to the figures:
Fig. 1 shows a (digital twin of a) single vision spectacle lens 100 with five ring-shaped structures 101 to 105.
Fig. 2 shows a cross-sectional view of the (digital twin of the) single vision spectacle lens 100 of figure 1 having a front surface 131 and a back surface 133. A uniform width w101 to w103 of a ring-shaped structure is limited by an inner onset, io101 , io102, io103, and a respective outer onset, oo101 , oo102, oo103. A central zone width cw110 is shown. For simplicity reasons only the three ring-shaped structures 101 to 103 are shown in figure 2 compared to the five ring-shaped structures 101 to 105 shown in figure 1 .
Fig. 3 shows a (digital twin of a) coated single vision spectacle lens 200 with five coated ring-shaped structures 201 to 205. 210 is a coated central zone. Fig. 4 shows a cross-sectional view of the (digital twin of the) coated single vision spectacle lens 200 of figure 3 having a coated front surface 231 and a coated back surface 233, coated with a coating 237. A uniform width w201 to w203 of a coated ring-shaped structure is limited by an inner onset, io201 , io202, io203, and a respective outer onset, oo201 , oo202, oo203. A central zone width cw210 is shown. For simplicity reasons only the three ring-shaped structures 201 to 203 are shown in figure 4 compared to the five ring-shaped structures 201 to 205 shown in figure 3.
Fig. 5 shows a (digital twin of a) single vision spectacle lens 300 with five ring-shaped diffusing structures 301 to 305.
Fig. 6 shows a cross-sectional view of (the digital twin of) the single vision spectacle lens 300 of figure 5 having a front surface 331 and a back surface 333. A uniform width w301 to w303 of a ring-shaped structure is limited by an inner onset, io301 , io302, io303, and a respective outer onset, oo301 , oo302, oo303. A central zone width cw310 is shown. For simplicity reasons only the three ring-shaped diffusing structures 301 to 303 are shown in figure 6 compared to the five ring-shaped diffusing structures 301 to 305 shown in figure 5.
In each of figures 1 to 6 a replacement by or an addition of at least one feature according to claim 10 may have taken place.
The invention will be further exemplarily demonstrated in the following with reference to a study:
Table 1 below shows different calculated design characteristics of a digital twin of a spectacle lens, in the order of satisfaction of wearability of a respective spectacle lens evaluated by a wearer. The subjects of a study evaluated said calculated design characteristics of said digital twin in a range from 1 to 10, wherein 10 equals to best possible wearability of respective a spectacle lens and 1 equals to the worst possible wearability of a respective spectacle lens. A satisfaction of wearability greater or equal to 4.0 is considered as sufficient, hence children would probably accept such spectacle lenses with said satisfaction of wearability and would probably not to tend to dismiss the respective spectacle lens.
The lenses 1 to 9 in table 1 are therefore examples of a digital twin of a spectacle lens and a respective spectacle lens whereas spectacle lenses 10 to 16 are considered as reference spectacle lenses for the spectacle lenses 1 to 9 in reference to the satisfaction of wearability.
Table 1 : Design characteristics of digital twins of spectacle lenses and respective spectacle lenses with the specific characterizations and wearer satisfaction and visual acuity when looking through the periphery of the lens.
Figure imgf000049_0001
Figure imgf000050_0001

Claims

1 . Spectacle lens (100 to 300) comprising a central zone (110, 210, 310, ...) having a central zone width (cw110, cw210, cw310, ...) within a range of 6 mm to 9.4 mm, and at least one of
- a plurality of ring-shaped structures (101 , 102, 103, ...),
- a plurality of ring-shaped diffusing structures (301 , 302, 303, ...), each ring-shaped structure of said plurality of ring-shaped structures (101 , 102, 103, ...) or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures (301 , 302, 303, ...) having a respective uniform width (w101 , w102, w103, w301 , w302, w303, ...), said uniform width (w101 , w102, w103, w301 , w302, w303, ...) being equal to or lower than 0.7 mm, each ring-shaped structure of said plurality of ring-shaped structures having a surface power which is different to a surface power of a lens surface of said spectacle lens comprising said plurality of ring-shaped structures outside a domain occupied by each ring-shaped structure of said plurality of ring-shaped structures, said spectacle lens (100 to 300) having a surface-based fill factor (sf101 , sf201) defined as a surface area ratio of a surface area of an innermost ring-shaped structure of said plurality of ringshaped structures (101 , 102, 103, ...) or of an innermost ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures (301 , 302, 303, ...) and a sum of said surface area of said innermost ring-shaped structure of said plurality of ring-shaped structures (101 , 102, 103, ...) or said innermost ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures (301 , 302, 303, ...) and a surface area of a peripheral zone (110, 210, 310, ...), said surface-based fill factor being at least one of
- larger than 17 % and equal to or lower than 70 % for said uniform width (w101 , w102, w103, ... ; w301 , w302, w303, ...) of each ring-shaped structure of said plurality of ring-shaped structures (101 , 102, 103, ...) or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures (301 , 302, 303, ...) being in a range of 0.6 mm to 0.7 mm;
- larger than 15 % and equal to or lower than 60 % for said uniform width (w101 , w102, w103, ... ; w301 , w302, w303, ...) of each ring-shaped structure of said plurality of ring-shaped structures (101 , 102, 103, ...) or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures (301 , 302, 303, ...) being in a range of 0.5 mm to 0.6 mm;
- larger than 6 % and equal to or lower than 50 % for said uniform width (w101 , w102, w103, ... ; w301 , w302, w303, ...) of each ring-shaped structure of said plurality of ring-shaped structures (101 , 102, 103, ...) or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures (301 , 302, 303, ...) being lower than 0.5 mm; said spectacle lens being characterized in comprising at least one feature of the following group of features outside said central zone:
- one ring-shaped diffractive structure or more ring-shaped diffractive structures, a ring-shaped diffractive structure not being an innermost ring-shaped diffractive structure,
- one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power, a ring-shaped structure having a variable surface power not being an innermost ring-shaped structure having a variable surface power, - one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width, a ring-shaped structure having a variable width not being an innermost ringshaped structure having a variable width,
- one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width, a ring-shaped diffusing structure having a variable width not being an innermost ring-shaped diffusing structure having a variable width.
2. Spectacle lens (100 to 300) comprising a central zone (110, 210, 310, ...) having a central zone width (cw110, cw210, cw310, ...) within a range of 6 mm to 9.4 mm, and at least one of
- a plurality of ring-shaped structures (101 , 102, 103, ...),
- a plurality of ring-shaped diffusing structures (301 , 302, 303, ...), each ring-shaped structure of said plurality of ring-shaped structures (101 , 102, 103, ...) or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures (301 , 302, 303, ...) having a respective uniform width (w101 , w102, w103, ... ; w301 , w302, w303, ...), said uniform width (w101 , w102, w103, ... ; w301 , w302, w303, ...) being equal to or lower than 0.7 mm, each ring-shaped structure of said plurality of ring-shaped structures having a surface power which is different to a surface power of a lens surface of said spectacle lens comprising said plurality of ring-shaped structures outside a domain occupied by each ring-shaped structure of said plurality of ring-shaped structures, said spectacle lens (100 to 300) being characterized in comprising at least one feature of the following group of features outside said central zone:
- one ring-shaped diffractive structure or more ring-shaped diffractive structures, each ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures having a uniform width equal to or lower than 0.7 mm,
- one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power, each ring-shaped structure having a variable surface power of said one ring-shaped structure having a variable surface power or said more ring-shaped structures each having a variable surface power having a uniform width equal to or lower than 0.7 mm,
- one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width,
- one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width, and in having a surface-based fill factor defined as a surface area ratio of a surface area of an innermost structure, said innermost structure being ring-shaped, said innermost structure being selected from one of the group consisting of a ring-shaped structure of said plurality of ring-shaped structures, a ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures, a ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ringshaped diffractive structures, a ring-shaped structure having said variable surface power of said one ring-shaped structure having said variable surface power or said more ring-shaped structures each having said variable surface power, a ring-shaped structure having said variable width of said one ring-shaped structure having said variable width or said more ring-shaped structures each having said variable width, and a ring-shaped diffusing structure having said variable width of said one ring-shaped diffusing structure having said variable width or said more ring-shaped diffusing structures each having said variable width, and a sum of said surface area of said innermost structure and a surface area of a peripheral zone, said surface-based fill factor being at least one of
- larger than 17 % and equal to or lower than 70 % for said uniform width of each structure being in a range of 0.6 mm to 0.7 mm,
- larger than 15 % and equal to or lower than 60 % for said uniform width of each structure being in a range of 0.5 mm to 0.6 mm,
- larger than 6 % and equal to or lower than 50 % for said uniform width of each structure being lower than 0.5 mm, each structure being ring-shaped, each structure being selected from at least one of the group consisting of said ring-shaped structure, said ring-shaped diffusing structure, said ring-shaped diffractive structure, said ring-shaped structure having said variable surface power, or said surface-based fill factor being at least one of
- larger than 17% and equal to or lower than 70% for said variable width of each structure varying in a range of 0.6 mm to 0.7 mm,
- larger than 15 % and equal to or lower than 60 % for said variable width of each structure varying in a range of 0.5 mm to 0.6 mm,
- larger than 6 % and equal to or lower than 50 % for said variable width of each structure being lower than 0.5 mm along each structure, each structure being ring-shaped, each structure being selected from at least one of the group consisting of said ring-shaped structure having said variable width and said ring-shaped diffusing structure having said variable width.
3. Spectacle lens according to claim 2, characterized in that said surface-based fill factor is at least one of
- larger than 17 % and equal to or lower than 70 % for said uniform width (w101 , w102, w103, ... ; w301 , w302, w303, ...) of each ring-shaped structure of said plurality of ring-shaped structures (101 , 102, 103, ...) or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures (301 , 302, 303, ...) being in a range of 0.6 mm to 0.7 mm;
- larger than 17% and equal to or lower than 70% for said uniform width of each ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures or each ring-shaped structure having a variable surface power of said one ring-shaped structure having said variable surface power or said more ring-shaped structures each having said variable surface power, said uniform width being in a range of 0.6 mm to
0.7 mm; - larger than 17% and equal to or lower than 70% for said variable width of each ring-shaped structure having a variable width of said one ring-shaped structure having said variable width or said more ring-shaped structures each having said variable width or each ring-shaped diffusing structure having a variable width of said one ring-shaped diffusing structure having said variable width or said more ring-shaped diffusing structures each having said variable width, said variable width varying in a range of 0.6 mm to 0.7 mm;
- larger than 15 % and equal to or lower than 60 % for said uniform width (w101 , w102, w103, ... ; w301 , w302, w303, ...) of each ring-shaped structure of said plurality of ring-shaped structures (101 , 102, 103, ...) or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures (301 , 302, 303, ...) being in a range of 0.5 mm to 0.6 mm;
- larger than 15 % and equal to or lower than 60 % for said uniform width of each ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures or each ring-shaped structure having a variable surface power of said one ring-shaped structure having said variable surface power or said more ring-shaped structures each having said variable surface power, said uniform width being in a range of 0.5 mm to
0.6 mm;
- larger than 15 % and equal to or lower than 60 % for said variable width of each ring-shaped structure having a variable width of said one ring-shaped structure having said variable width or said more ring-shaped structures each having said variable width or each ring-shaped diffusing structure having a variable width of said one ring-shaped diffusing structure having said variable width or said more ring-shaped diffusing structures each having said variable width, said variable width varying in a range of 0.5 mm to 0.6 mm;
- larger than 6 % and equal to or lower than 50 % for said uniform width (w101 , w102, w103, ... ; w301 , w302, w303, ...) of each ring-shaped structure of said plurality of ring-shaped structures (101 , 102, 103, ...) or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures (301 , 302, 303, ...) being lower than 0.5 mm;
- larger than 6 % and equal to or lower than 50 % for said uniform width of each ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures or each ring-shaped structure having a variable surface power of said one ring-shaped structure having said variable surface power or said more ring-shaped structures each having said variable surface power, said uniform width being lower than 0.5 mm;
- larger than 6 % and equal to or lower than 50 % for said variable width of each ring-shaped structure having a variable width of said one ring-shaped structure having said variable width or said more ring-shaped structures each having said variable width or each ring-shaped diffusing structure having a variable width of said one ring-shaped diffusing structure having said variable width or said more ring-shaped diffusing structures each having said variable width, said variable width being lower than 0.5 mm along each ring-shaped structure having a variable width.
4. Spectacle lens (100 to 300) comprising a central zone (110, 210, 310, ...) having a central zone width (cw110, cw210, cw310, ...) within a range of 6 mm to 9.4 mm, and at least one of - a plurality of ring-shaped structures (101 , 102, 103, ...),
- a plurality of ring-shaped diffusing structures (301 , 302, 303, ...), each ring-shaped structure of said plurality of ring-shaped structures (101 , 102, 103, ...) or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures (301 , 302, 303, ...) having a respective uniform width (w101 , w102, w103, w301 , w302, w303,
Figure imgf000055_0001
said uniform width (w101 , w102, w103, w301 , w302, w303, ...), each ring-shaped structure of said plurality of ring-shaped structures having a surface power which is different to a surface power of a lens surface of said spectacle lens comprising said plurality of ring-shaped structures outside a domain occupied by each ring-shaped structure of said plurality of ring-shaped structures, said spectacle lens (100 to 300) being characterized in comprising at least one feature of the following group of features outside said central zone:
- one ring-shaped diffractive structure or more ring-shaped diffractive structures,
- one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power,
- one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width,
- one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width.
5. Spectacle lens according to any one of preceding claims, characterized in that said central zone comprises an optical centre or a fitting point of said spectacle lens, said optical centre as defined in ISO 13666:2019(E), section 3.2.15, said fitting point as defined in ISO 13666:2019(E), section 3.2.34.
6. Spectacle lens according to any one of the preceding claims, characterized in that said uniform width (w101 , w102, w103, ... ; w201 , w202, w103, ...) is within at least one range of the following group of ranges:
(i) said uniform width (w101 , w102, w103, ... ; w201 , w202, w103, ...) is larger than 0.2 mm and equal to or lower than 0.7 mm;
(ii) said uniform width (w101 , w102, w103, ... ; w201 , w202, w103, ...) is larger than 0.3 mm and equal to or lower than 0.7 mm;
(iii) said uniform width (w101 , w102, w103, ... ; w201 , w202, w103, ...) is equal to or lower than 0.6 mm;
(iv) said uniform width (w101 , w102, w103, ... ; w201 , w202, w103, ...) is larger than 0.2 mm and equal to or lower than 0.6 mm;
(v) said uniform width (w101 , w102, w103, ... ; w201 , w202, w103, ...) is larger than 0.3 mm and equal to or lower than 0.6 mm;
(vi) said uniform width (w101 , w102, w103, ... ; w201 , w202, w103, ...) is equal to or lower than 0.5 mm; (vii) said uniform width (w101 , w102, w103, w201 , w202, w103, ...) is larger than 0.2 mm and equal to or lower than 0.5 mm;
(viii) said uniform width (w101 , w102, w103, ... ; w201 , w202, w103, ...) is larger than 0.3 mm and equal to or lower than 0.5 mm.
7. Spectacle lens according to any one of the preceding claims 2 and 3, characterized in that said uniform width of a) each ring-shaped diffractive structure of said one ring-shaped diffractive structure or said more ring-shaped diffractive structures or b) each ring-shaped structure having said variable surface power of said one ring-shaped structure having said variable surface power or said more ring-shaped structures each having said variable surface power, each is within at least one range of the following group of ranges:
(i) said uniform width is larger than 0.2 mm and equal to or lower than 0.7 mm;
(ii) said uniform width is larger than 0.3 mm and equal to or lower than 0.7 mm;
(iii) said uniform width is equal to or lower than 0.6 mm;
(iv) said uniform width is larger than 0.2 mm and equal to or lower than 0.6 mm;
(v) said uniform width is larger than 0.3 mm and equal to or lower than 0.6 mm;
(vi) said uniform width is equal to or lower than 0.5 mm;
(vii) said uniform width is larger than 0.2 mm and equal to or lower than 0.5 mm;
(viii) said uniform width is larger than 0.3 mm and equal to or lower than 0.5 mm.
8. Spectacle lens according to any one of the preceding claims, characterized in that said central zone width (cw1 10, cw210, cw310, ...) is within at least one range of the following group of ranges: (i) said central zone width (cw110, cw210, cw310, ...) is larger than 6 mm and lower than or equal to 7 mm;
(II) said central zone width (cw110, cw210, cw310, ...) is larger than 7 mm and lower than or equal to 9.4 mm.
9. Spectacle lens according to any one of the preceding claims, characterized in that a difference of said surface power of each ring-shaped structure of said plurality of ring-shaped structures to said surface power of said lens surface comprising said plurality of ring-shaped structures outside said domain occupied by each ring-shaped structure of said plurality of ring-shaped structures, is within at least one range of the following group of ranges:
A) said difference in surface power being within a range of larger than 6 dioptres and equal to or lower than 12 dioptres;
B) said difference in surface power being within a range of larger than 7 dioptres and equal to or lower than 11 dioptres;
C) said difference in surface power being within a range of larger than 8 dioptres and equal to or lower than 10 dioptres.
10. Spectacle lens according to any one of the preceding claims, characterized in that said variable width varies within at least one range of the following group of ranges: (i) said variable width varies in a range of larger than 0.2 mm and equal to or lower than
0.7 mm;
(ii) said variable width varies in a range of larger than 0.3 mm and equal to or lower than
0.7 mm;
(iii) said variable width varies in a range of lower than 0.6 mm;
(iv) said variable width varies in a range of larger than 0.2 mm and equal to or lower than
0.6 mm;
(v) said variable width varies in a range of larger than 0.3 mm and equal to or lower than
0.6 mm;
(vi) said variable width varies in a range of lower than 0.5 mm;
(vii) said variable width varies in a range of larger than 0.2 mm and equal to or lower than
0.5 mm;
(viii) said variable width varies in a range of larger than 0.3 mm and equal to or lower than
0.5 mm.
11. Spectacle lens according to any one of the preceding claims, characterized in that each of said one ring-shaped structure having said variable surface power or each ring-shaped structure of said more ring-shaped structures having said variable surface power has said variable surface power which is different to said surface power of said lens surface comprising said one or more ring-shaped structure(s) each having said variable surface power outside a domain occupied by said one ring-shaped structure or by each ring-shaped structure of said more ring-shaped structures each having said variable surface power, said variable surface power varying within at least one range of the following group of ranges:
A) a difference in surface power varying within a range of larger than 6 dioptres and equal to or lower than 12 dioptres;
B) a difference in surface power varying within a range of larger than 7 dioptres and equal to or lower than 11 dioptres;
C) a difference in surface power varying within a range of larger than 8 dioptres and equal to or lower than 10 dioptres.
12. Method being configured for calculating by a computer a digital twin of a spectacle lens (100 to 300) for the purpose of a use of said digital twin for manufacturing the spectacle lens, said digital twin comprising at least one of a plurality of ring-shaped structures (101 , 102, 103, ...) and a plurality of ring-shaped diffusing structures (301 , 302, 303, ...), each having a respective uniform width (w101 , w102, w103, ...; w301 , w302, w303, ...), each ring-shaped structure of said plurality of ring-shaped structures having a surface power which is different to a surface power of a lens surface of said spectacle lens comprising said plurality of ring-shaped structures outside a domain occupied by each ring-shaped structure of said plurality of ring-shaped structures, the method being characterized in the step of a) replacing - each ring-shaped structure of said plurality of ring-shaped structures, or
- each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures, by at least one of
- a ring-shaped diffractive structure,
- a ring-shaped structure each having a variable surface power,
- a ring-shaped structure each having a variable width,
- a ring-shaped diffusing structure each having a variable width, or b) replacing
- one ring-shaped structure of said plurality of ring-shaped structures, or
- one ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures, by at least one of
- a ring-shaped diffractive structure,
- a ring-shaped structure each having a variable surface power,
- a ring-shaped structure each having a variable width,
- a ring-shaped diffusing structure each having a variable width, or c) replacing
- each ring-shaped structure of a subset of ring-shaped structures of said plurality of ring-shaped structures, or
- each ring-shaped diffusing structure of a subset of ring-shaped diffusing structures of said plurality of ring-shaped diffusing structures, by at least one of
- a ring-shaped diffractive structure,
- a ring-shaped structure each having a variable surface power,
- a ring-shaped structure each having a variable width,
- a ring-shaped diffusing structure each having a variable width, or d) adding at least one of
- one ring-shaped diffractive structure or more ring-shaped diffractive structures,
- one ring-shaped structure having a variable surface power or more ring-shaped structures each having a variable surface power,
- one ring-shaped structure having a variable width or more ring-shaped structures each having a variable width,
- one ring-shaped diffusing structure having a variable width or more ring-shaped diffusing structures each having a variable width, to
- said plurality of ring-shaped structures or said plurality of ring-shaped diffusing structures, while maintaining a surface-based fill factor defined as a surface area ratio of a surface area of an innermost ring-shaped structure of said plurality of ring-shaped structures (101 , 102, 103, ...) or of an innermost ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures (301 , 302, 303, ...) and a sum of said surface area of said innermost ring-shaped structure of said plurality of ring-shaped structures (101 , 102, 103, ...) or said innermost ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures (301 , 302, 303, ...) and a surface area of a peripheral zone (1 10, 210, 310, ...), said innermost ring-shaped structure of said plurality of ring-shaped structures or said innermost ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures each being positioned adjacent and along a central zone.
13. Method according to the preceding claim 12, characterized in that said central zone width (cw110, cw210, cw310, ...) being within a range of 6 mm to 9.4 mm.
14. Method according to any one of the preceding claims 12 and 13, characterized in that said surface-based fill factor is selected from at least one surface-based fill factor of the group consisting of:
- larger than 17 % and equal to or lower than 70 % for said uniform width (w101 , w102, w103, ... ; w301 , w302, w303, ...) of each ring-shaped structure of said plurality of ring-shaped structures (101 , 102, 103, ...) or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures (301 , 302, 303, ...) being in a range of 0.6 mm to 0.7 mm, or
- larger than 15 % and equal to or lower than 60 % for said uniform width (w101 , w102, w103, ... ; w301 , w302, w303, ...) of each ring-shaped structure of said plurality of ring-shaped structures (101 , 102, 103, ...) or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures (301 , 302, 303, ...) being in a range of 0.5 mm to 0.6 mm, or
- larger than 6 % and equal to or lowerthan 50 % for said uniform width (w101 , w102, w103, ... ; w301 , w302, w303, ...) of each ring-shaped structure of said plurality of ring-shaped structures (101 , 102, 103, ...) or each ring-shaped diffusing structure of said plurality of ring-shaped diffusing structures (301 , 302, 303, ...) being lower than 0.5 mm.
15. Method according to any one of the preceding claims 12 to 14, characterized in that said central zone comprises an optical centre or a fitting point of said digital twin, said optical central defined analogously as in ISO 13666:2019(E), section 3.2.15, said fitting point defined analogously as in ISO 13666:2019(E), section 3.2.34.
16. Method according to any one of preceding claims 12 to 15, characterized in that said uniform width (w101 , w102, w103, ... ; w201 , w202, w103, ...) is within at least one range of the following group of ranges:
(i) said uniform width (w101 , w102, w103, ...; w201 , w202, w103, ...) is larger than 0.2 mm and equal to or lower than 0.7 mm;
(II) said uniform width (w101 , w102, w103, ... ; w201 , w202, w103, ...) is larger than 0.3 mm and equal to or lower than 0.7 mm;
(iii) said uniform width (w101 , w102, w103, ... ; w201 , w202, w103, ...) is equal to or lower than 0.6 mm; (iv) said uniform width (w101 , w102, w103, w201 , w202, w103, ...) is larger than 0.2 mm and equal to or lower than 0.6 mm;
(v) said uniform width (w101 , w102, w103, ...; w201 , w202, w103, ...) is larger than 0.3 mm and equal to or lower than 0.6 mm;
(vi) said uniform width (w101 , w102, w103, ...; w201 , w202, w103, ...) is equal to or lower than 0.5 mm;
(vii) said uniform width (w101 , w102, w103, ...; w201 , w202, w103, ...) is larger than 0.2 mm and equal to or lower than 0.5 mm;
(viii) said uniform width (w101 , w102, w103, ...; w201 , w202, w103, ...) is larger than 0.3 mm and equal to or lower than 0.5 mm.
17. Method according to any one of the preceding claims 12 to 16, characterized in that said central zone width (cw110, cw210, cw310, ...) is within at least one range of the following group of ranges:
(i) said central zone width (cw110, cw210, cw310, ...) is larger than 6 mm and lowerthan or equal to 7 mm;
(ii) said central zone width (cw110, cw210, cw310, ...) is larger than 7 mm and lower than or equal to 9.4 mm.
18. Method according to any one of the preceding claims 10 to 17, characterized in that a difference of said surface power of each ring-shaped structure to said surface power of said lens surface comprising said plurality of ring-shaped structures outside a domain occupied by each ringshaped structure of said plurality of ring-shaped structures is within at least one range of the following group of ranges:
A) a difference in surface power being within a range of larger than 6 dioptres and equal to or lower than 12 dioptres;
B) a difference in surface power being within a range of larger than 7 dioptres and equal to or lower than 11 dioptres;
C) a difference in surface power being within a range of larger than 8 dioptres and equal to or lower than 10 dioptres.
19. Method according to any one of the preceding claims 10 to 18, characterized in that said variable width varies within at least one range of the following group of ranges:
(i) said variable width varies in a range of larger than 0.2 mm and equal to or lower than 0.7 mm;
(ii) said variable width varies in a range of larger than 0.3 mm and equal to or lower than
0.7 mm;
(iii) said variable width varies in a range of lowerthan 0.6 mm;
(iv) said variable width varies in a range of larger than 0.2 mm and equal to or lower than
0.6 mm; (v) said variable width varies in a range of larger than 0.3 mm and equal to or lower than
0.6 mm;
(vi) said variable width varies in a range of lower than 0.5 mm;
(vii) said variable width varies in a range of larger than 0.2 mm and equal to or lower than
0.5 mm;
(viii) said variable width varies in a range of larger than 0.3 mm and equal to or lower than 0.5 mm.
20. Method according to any one of the preceding claims 10 to 19, characterized in that each of said one ring-shaped structure having a variable surface power or each ring-shaped structure of said more ring-shaped structures each having a variable surface power has said variable surface power which is different to said surface power of said lens surface comprising said one or more ring-shaped structure(s) having said variable surface power outside a domain occupied by said one ring-shaped structure or by each each ring-shaped structure of said more ring-shaped structures each having said variable surface power, said variable surface power varying within at least one range of the following group of ranges:
A) a difference in surface power varying within a range of larger than 6 dioptres and equal to or lower than 12 dioptres;
B) a difference in surface power varying within a range of larger than 7 dioptres and equal to or lower than 11 dioptres;
C) a difference in surface power varying within a range of larger than 8 dioptres and equal to or lower than 10 dioptres.
21 . Computer comprising a processor configured to perform the method of any one of preceding claims 12 to 20.
22. Computer program comprising instructions which, when the program is executed by a computer, cause the computer to carry out the method of any one of preceding claims 12 to 20.
23. Computer-readable storage medium having stored thereon the computer program of claim 22.
24. Data carrier signal carrying the computer program of claim 22.
25. Data set comprising at least one of the following kinds of data: i) a digital twin of the spectacle lens as claimed in any one of the claims 1 to 11 , said digital twin being configured forthe purpose of use for a manufacture of the spectacle lens as claimed in any one of the claims 1 to 1 1 , and ii) data containing computer-readable instructions for controlling one or more manufacturing machines in order to produce the spectacle lens as claimed in any one of the claims 1 to 11. Method according to any one of claims 12 to 20 being further configured for manufacturing a spectacle lens based on said digital twin of said spectacle lens.
PCT/EP2024/054080 2023-02-16 2024-02-16 Spectacle lens and method Ceased WO2024170781A1 (en)

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