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WO2025037042A2 - Élément de lentille de régulation de myopie - Google Patents

Élément de lentille de régulation de myopie Download PDF

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Publication number
WO2025037042A2
WO2025037042A2 PCT/EP2024/085166 EP2024085166W WO2025037042A2 WO 2025037042 A2 WO2025037042 A2 WO 2025037042A2 EP 2024085166 W EP2024085166 W EP 2024085166W WO 2025037042 A2 WO2025037042 A2 WO 2025037042A2
Authority
WO
WIPO (PCT)
Prior art keywords
equal
lens element
optical
annular zone
reference point
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.)
Pending
Application number
PCT/EP2024/085166
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English (en)
Other versions
WO2025037042A3 (fr
Inventor
Rajkumar NALLOUR RAVEENDRAN
Matthieu Guillot
Bruno Fermigier
Eric Gacoin
Carlos Rego
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.)
EssilorLuxottica SA
Original Assignee
Essilor International Compagnie Generale dOptique SA
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 Essilor International Compagnie Generale dOptique SA filed Critical Essilor International Compagnie Generale dOptique SA
Publication of WO2025037042A2 publication Critical patent/WO2025037042A2/fr
Publication of WO2025037042A3 publication Critical patent/WO2025037042A3/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G02C7/022—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
    • G02C2202/24—Myopia progression prevention

Definitions

  • the disclosure relates to a lens element, for example a myopia control lens element, adapted for a wearer, said lens element providing a first optical function having a power based on the prescription of the wearer, and comprising a plurality of optical elements, for example at least twenty optical elements, each optical element of the plurality of optical elements providing one or more optical functions, at least one of which is different from the first optical function.
  • a lens element for example a myopia control lens element, adapted for a wearer, said lens element providing a first optical function having a power based on the prescription of the wearer, and comprising a plurality of optical elements, for example at least twenty optical elements, each optical element of the plurality of optical elements providing one or more optical functions, at least one of which is different from the first optical function.
  • Myopia of an eye is characterized by the fact that the eye focuses distant objects in front of its retina. Myopia is usually corrected using a concave lens and hyperopia is usually corrected using a convex lens.
  • Such focusing defect may have an impact on the progression of myopia of such individuals.
  • optical elements such as microlenses or lenslets
  • the purpose of the optical elements is to provide an optical blurred image on the retina of the wearer, triggering a stop signal to the eye’s growth. More generally, the purpose of the optical elements is to provide a myopia control signal, slowing down the eye growth.
  • the central area of the lens element having the optical elements may be free of optical elements, to enable a good and clear vision.
  • myopia progression could be slowed down by providing a slight diffusion in the periphery visual field, with arrays of small dots.
  • the basic principle of this solution is to decrease the contrast of the eye elongation signal, in the peripheral visual field.
  • the pattern formed by the optical element may show an alternance of two main areas: the “refractive areas” used to correct the myopia of the wearer, and the “defocus areas” used to control the myopia.
  • New optical designs propose arrays of contiguous lenslets covering the lens element, without large “refractive areas” free of optical elements: that means that each optical element creates both functions of myopia Rx correction (or create a blur acceptable for the good vision of the wearer) and myopia control defocus signal.
  • optical elements Different designs of optical elements have been designed with unifocal spherical lenslets, aspherical lenslets, “bifocal” lenslets, Pi-Fresnel lenslets, or even continuous torus, the optical elements may be contiguous or not.
  • a lens element intended to be worn in front of an eye of a person comprising:
  • the ratio of the surface of the annular zone having an additional optical power greater than or equal to 7.5 diopters in absolute value and relative to the power at the reference point, for example optical center, of the lens element over the total surface of the annular zone is greater than or equal to 0.02, for example greater than or equal to 0.05, for example greater than or equal to 0.09 and smaller than or equal to 0.5, for example smaller than or equal to 0.3.
  • providing an additional power greater than or equal to 7.5 diopters over an annular zone centered on a reference point of the lens increases the myopia control efficiency of the lens element compared to prior art lenses that have additional power usually around 3 to 4 diopters.
  • Limiting the increase in additional optical power to 50%, for example 30% of the surface of the annular zone allows preserving a good visual acuity.
  • the ratio of the surface of the annular zone having an additional optical power greater than or equal to 7.5 diopters in absolute value and relative to the power at the reference point, for example optical center, of the lens element over the total surface of the annular zone is greater than or equal to 0.02, for example greater than or equal to 0.05, for example greater than or equal to 0.09 and smaller than or equal to 0.5, for example smaller than or equal to 0.3; and/or over an annular zone centered on a reference point, for example the optical center, of the lens element and having an inner diameter of 8 mm and an outer diameter of 36 mm, the ratio of the surface of the annular zone having an additional optical power greater than or equal to 7.5 diopters in absolute value and relative to the power at the reference point, for example optical center, of the lens element over the total surface of the
  • the annular zone(s) comprise(s) a plurality of sub-zones having an additional optical power greater than or equal to 7.5 diopters in absolute value and relative to the power at the reference point, for example optical center, of the lens, and at least 30 sub-zones, for example at least 40 sub-zones, for example each of the sub-zones, comprise a disk having a diameter of 0.3 mm; and/or at least 50% of the sub-zones, for example at least 80% of the sub-zones, for example at least 95% of the sub-zones have a difference of average additional optical power between a central area of 0.2 mm diameter centered on the center of the disk of 0.3 diameter comprised in the sub-zone, and an annular zone centered on said center of the disk of 0.3 diameter and having an interior diameter of 0.63 mm and an exterior diameter of 0.73 mm, greater than or equal to 2 diopters, for example greater than or equal to 3 diopters and smaller than or equal to 7 diopters, for example smaller than or equal
  • the center of the disk of 0.3 mm diameter is distant for the center of the disk of 0.3 mm diameter of the other sub-zones of a distance greater than or equal to 0.8 mm;
  • each sub-zone is within an optical element; and/or over an annular zone centered on a reference point, for example the optical center, of the lens element and having an inner diameter of 8 mm and an outer diameter of 17 mm, the ratio of the surface of the annular zone having an additional optical power greater than or equal to 10 diopters in absolute value and relative to the power at the reference point, for example optical center, of the lens element over the total surface of the annular zone is greater than or equal to 0.015, for example greater than or equal to 0.025, for example greater than or equal to 0.03 and smaller than or equal to 0.5, for example smaller than or equal to 0.3; and/or over an annular zone centered on a reference point, for example the optical center, of the lens element and having an inner diameter of 8 mm and an outer diameter of 25 mm, the ratio of the surface of the annular zone having an additional optical power greater than or equal to 10 diopters in absolute value and relative to the power at the reference point
  • the annular one(s) comprise(s) a plurality of sub-zones having an additional optical power greater than or equal to 10 diopters in absolute value and relative to the power at the reference point, for example the optical center, of the lens, and at least 30 sub-zones, for example at least 40 sub-zones, for example each of the sub-zones, comprise a disk having a diameter of 0.15 mm; and/or for each sub-zone, the center of the disk of 0.15 mm diameter is distant for the center of the disk of 0.3 mm diameter of the other sub-zones of a distance greater than or equal to 1 mm, for example the sub-zones are non-contiguous circular zones, for example each sub-zones is within an optical element; and/or
  • the annular zone(s) comprise(s) four complementary quadrants each having a 90° angular sector, for example six complementary quadrants each having a 60° angular sector, for example eight complementary quadrants each having a 45° angular sector the ratio of surfaces defined for the annular zone(s) applied to each quadrant; and/or - the lens element has a center area, for example having a diameter greater than or equal to 5 mm and smaller than or equal to 8.5 mm, comprising the reference point of the lens element, being free of optical elements and providing the power based on a prescription for said eye of the person; and/or
  • each concentric ring consists of a plurality of contiguous optical elements; and/or at least 50%, for example at least 80%, for example all of the optical elements are refractive lenslets; and/or at least 50%, for example at least 80%, for example all of the optical elements are refractive tori; and/or
  • the concentric rings of optical elements have an inner diameter comprised between 9.0 mm and 60 mm, the inner diameter corresponding to the smallest circle that is tangent to at least one optical element of said circle;
  • optical elements correspond to a series of torus concentric rings
  • the optical elements are positioned in a network, such as for instance a grid, a honeycomb, or concentric rings; and/or
  • optical elements are refractive lenslets, for example having a spherical, aspherical optical function or “bifocal” lenslets;
  • optical elements are diffusive lenslets or Pi-Fresnel lenslets; and/or
  • the concentric rings of optical elements have an inner diameter comprised between 9.0 mm and 60 mm, the inner diameter corresponding to the smallest circle that is tangent to at least one optical element of said circle;
  • optical elements are contiguous optical elements.
  • optical elements are non-contiguous optical elements.
  • each optical element has a contour shape being inscribable in a circle having a diameter greater than or equal to 0.1 mm, for example greater than 0.5 mm and smaller than or equal to 3.0 mm, for example smaller than or equal to 2.5 mm; and/or
  • the lens element comprises a refraction area configured to provide to the wearer in standard wearing conditions, in particular for foveal vision, a first optical power based on the prescription of the wearer, the optical elements providing at least a second optical power;
  • the refraction area comprises a plurality of respectively independent islandshaped areas
  • the refraction area is formed as the area other than the optical elements and each refraction island shape area is within one optical element;
  • the refraction area is formed as the area other than the areas formed of the plurality of optical elements;
  • the lens element comprises a refraction area configured to provide to the wearer in standard wearing conditions, in particular for foveal vision, a first optical power, the optical elements providing at least a second optical power, the first optical power and the at least second optical power being based on the prescription of the wearer; and/or
  • the lens element comprises a refraction area configured to provide to the wearer in standard wearing conditions, in particular for foveal vision, a first optical power, the optical elements providing at least a second optical power, the sum of the first optical power and the at least second optical power being based on the prescription of the wearer; and/or
  • the optical elements may provide simultaneously a plurality of optical functions; and/or at least 50%, for example at least 80%, for example at least 99%, for example all, of the optical elements are diffusive lenslets; and/or at least 50%, for example at least 80%, for example at least 99%, for example all, of the optical elements are multifocal lenslets; and/or at least part, for example all, of the front and/or the back surface of the lens element is covered with a coating; and/or at least part, for example all, of the optical elements are located on the front surface of the lens element; and/or at least part, for example all, of the optical elements are located on the back surface of the lens element; and/or at least part, for example all, of the optical elements are located between the front and the back surfaces of the lens element; and/or
  • the optical elements have a contour shape being inscribable in a circle having a diameter greater than or equal to 0.6 mm, for example greater than or equal to 0.8 mm and smaller than or equal to 3.0 mm, for example smaller than or equal to 2.0 mm; and/or
  • the optical elements are positioned on a mesh
  • the mesh is a structured mesh
  • the optical elements are positioned along a plurality of concentric rings;
  • the lens element further comprises at least four optical elements organized in at least two groups of contiguous optical elements; and/or each group of contiguous optical element is organized in at least two concentric rings having the same center, the concentric ring of each group of contiguous optical element being defined by an inner diameter corresponding to the smallest circle that is tangent to at least one optical element of said group and an outer diameter corresponding to the largest circle that is tangent to at least one optical elements of said group; and/or at least part of, for example all the concentric rings of optical elements are centered on the reference point, for example the optical center, of the surface of the lens element on which said optical elements are disposed; and/or
  • the concentric rings of optical elements have a diameter comprised between 9.0 mm and 60 mm;
  • the distance between two successive concentric rings of optical elements is greater than or equal to 0.5 mm, the distance between two successive concentric rings being defined by the difference between the outer diameter of a first concentric ring and the inner diameter of a second concentric ring, the second concentric ring being closer to the periphery of the lens element; and/or - the optical element further comprises optical elements positioned radially between two concentric rings; and/or
  • the structured mesh is a squared mesh or a hexagonal mesh or a triangle mesh or an octagonal mesh
  • the mesh structure is a random mesh, for example a Voronoid mesh; and/or at least 50%, for example at least 80%, for example at least 99%, for example all, of the optical elements have a constant optical power and a discontinuous first derivative between two contiguous optical elements; and/or at least 50%, for example at least 80%, for example at least 99%, for example all, of the optical elements have a varying optical power and a continuous first derivative between two contiguous optical elements; and/or at least 50%, for example at least 80%, for example at least 99%, for example all, of the optical element has an optical function of focusing an image on a position other than the retina in standard wearing conditions; and/or at least 50%, for example at least 80%, for example at least 99%, for example all, optical elements have a non-spherical focused optical function in standard wearing conditions and for peripheral vision; and/or at least 50%, for example at least 80%, for example at least 99%, for example all, of the optical elements has a cylindrical power;
  • the optical elements are configured so that along at least one, for example along at least 6 equally distributed, for example all, section(s) of the lens element, for example a section passing by the reference point, for example the optical center, of the lens element, the mean sphere of optical elements increases from a point of said section towards the peripheral part of said section; and/or
  • the optical elements are configured so that along at least one, for example along at least 6 equally distributed, each section passing through the centers of 6 optical elements arranged in regular ways around the reference point of the lens element;
  • the optical elements are configured so that along at least one, for example along at least 8 equally distributed, for example along all, section(s) of the lens the cylinder of optical elements increases from a point of said section towards the peripheral part of said section;
  • the optical elements are configured so that along the at least one, for example along at least 6 equally distributed, for example along all, section(s) of the lens the mean sphere and/or the cylinder of optical elements increases from the center of said section towards the peripheral part of said section; and/or
  • the refraction area comprises an reference point, for example the optical center
  • the optical elements are configured so that along at least one, for example along at least 8 equally distributed, for example all, section(s) passing through the reference point, for example the optical center, of the lens the mean sphere and/or the cylinder of the optical elements increases from the reference point, for example the optical center, towards the peripheral part of the lens; and/or
  • the refraction area comprises a far vision reference point, a near vision reference, and a meridian joining the far and near vision reference points
  • the optical elements are configured so that in standard wearing conditions along at least one, for example at least 8 equally distributed, for example all horizontal section of the lens the mean sphere and/or the cylinder of the optical elements increases from the intersection of said horizontal section with the meridian towards the peripheral part of the lens; and/or
  • the mean sphere and/or the cylinder increase functions along the sections are different depending on the position of said section along the meridian;
  • the optical elements are configured so that in standard wearing conditions the at least one section is a horizontal section;
  • the mean sphere and/or the cylinder of optical elements increases from a first point of said section towards the peripheral part of said section and decreases from a second point of said section towards the peripheral part of said section, the second point being closer to the peripheral part of said section than the first point;
  • the mean sphere and/or the cylinder increase function along the at least one section is a Gaussian function; and/or - the mean sphere and/or the cylinder increase function along the at least one section is a Quadratic function; and/or
  • the optical elements are configured so that the mean focus of the light rays passing through each optical element is at a same distance to the retina;
  • the refractive area is formed as the area other than the areas formed as the plurality of optical elements; and/or at least part, for example all, of the optical elements are located on the front surface of the lens element; and/or
  • the at least one multifocal refraction lenslet comprises a cylindrical power
  • the at least one, for example all, multifocal refractive lenslet comprises an aspherical surface, with or without any rotational symmetry; and/or at least one, for example all, of the optical elements is a toric refractive lenslet; and/or at least one multifocal refractive lenslet comprises a toric surface; and/or at least part, for example all, optical functions comprise high order optical aberrations.
  • FIG. 1 illustrates a front view of a lens element according to first embodiment of the disclosure
  • FIG. 2A and 2B illustrate a profile view a lens element according to different embodiments of the disclosure
  • o Figure 3 illustrates a front view of a lens element according to a second embodiment of the disclosure
  • o Figures 4A and 4B illustrates a front view of a lens element according to a third embodiment of the disclosure
  • o Figure 5 represents a front view of a lens element according to an embodiment of the disclosure.
  • the disclosure relates to a lens element intended to be worn by a wearer.
  • optical lens can refer to an uncut optical lens or a spectacle optical lens edged to fit a specific spectacle frame or an ophthalmic lens and an optical device adapted to be positioned on the ophthalmic lens.
  • the “optical lens” in the context of the present disclosure may have a coating such as a hardcoat and/or a stack of anti -reflective coatings.
  • the optical lens LI, L2 according to the
  • the optical elements 14 of the optical lens according to the disclosure may have different shape and/or optical function or a combination of such shape and optical function.
  • the optical elements may be spherical lenslets, i.e. having a spherical optical function.
  • An example of myopia control solution with spherical lenslets is disclosed in US20170131567.
  • the optical elements may be non-spherical lenslets, i.e. having an optical function with at least two focal points.
  • a non-spherical lenslets may have a continuous power evolution over its surface.
  • the optical elements may be “bifocal” lenslets comprising a central part within an annular part.
  • the annular part providing an additional optical power and the center part providing an optical power based on the prescription of the wearer.
  • the refraction area comprises a plurality of respectively independent islandshaped areas.
  • the refraction area is formed as the area other than the optical elements and each refraction island shape area is within one optical element.
  • the optical elements have an annular shape around a refraction area. An example of such configuration is described in WO2021198362.
  • the optical element may be placed on structure network, for example a squared or hexagonal network or a random network.
  • lens element may comprise a plurality of contiguous lenslets arranged on such structured network having an island shape refraction area within the structured network.
  • Such structured may be obtained by stamping on a single vision lens. An example of such configuration is described in WO2019166657.
  • the optical elements are Pi-Fresnel lenslets.
  • a face of the lens element is fully covered with a plurality of contiguous Fresnel type optical elements.
  • the optical element be a Fresnel type optical element whose phase function y(r) has TI phase jumps at the nominal wavelength Xo.
  • y(r) has TI phase jumps at the nominal wavelength Xo.
  • the optical elements may be a set of torus concentric rings.
  • An example of such configuration is disclosed in WO2019166657.
  • the optical lens comprises at least a first surface and a second surface opposed to the second surface.
  • the first surface may comprise an object side surface Fl formed as a convex curved surface toward an object side and the second surface may comprise an eye side surface F2 formed as a concave surface having a different curvature than the curvature of the object side surface.
  • the lens element LI, L2 may be made of organic material, thermoset or thermoplastic material, for example polycarbonate, or made of mineral material such as glass.
  • the lens element LI, L2 may also be made of two layers of abovementioned materials having a different refractive index. Whatever the lens is made of one or more materials, the disposition of the optical element may be similar to the figure 1, figure 3 or figure 4 type.
  • an optical element 10 may include a thermoplastic layer 32 and a thermoset layer 34.
  • Optical elements 14 may be formed within/on a first surface 36 of the thermoplastic layer 32.
  • the first surface 36 of the thermoplastic layer 32 may be processed such that the optical elements 14 thereon appear to be debossed within the first surface 36 of the thermoplastic layer 32.
  • the optical elements 14 on the first surface 36 of the thermoplastic layer 32 may be hemispherical (spherical or not) and of a concave shape or protruding towards the object side of the lens element.
  • the front and/or back surfaces of the lens element are smooth.
  • the term “smooth” refers to a state of surface of a lens element in which the unevenness of said surface is smaller than or equal to 0.5 m, for example smaller than or equal to 0.4 pm.
  • the term “unevenness of a surface” refers to the difference between a maximum value and a minimum value of the deviation distance from the most approximate sphere.
  • the term “most approximate sphere” is a spherical shape calculated from a measured value (height distribution) of the surface using the least squares method.
  • the term “smooth” may be defined as follows.
  • the term “smooth” refers to the state of a surface whose rate of change in the average surface power (unit: D) at a given position of the surface in a given direction is smaller than or equal to 0.5 D/mm, for example smaller than or equal to 0.4 D/mm.
  • smooth may also be defined as a state in which the difference between the minimum value and the maximum value of the average surface power is smaller than the difference (the power added by the filled segments) between the minimum value and the maximum value of the transmission power.
  • the thermoset layer 34 may be, generally, made of a crosslinked material (e.g., thermosetting materials).
  • the thermoset layer 34 may be one obtained by polymerization of allyl derivatives such as the allyl carbonates of linear or branched aliphatic or aromatic polyols. This may further include diethylene glycol bis(allyl carbonate), isopropylene bis phenol-A bis(allyl carbonate), poly(meth)acrylates and copolymers based substrates, polythio(meth)acrylates, thermosetting polyurethanes, polythiourethanes, polyepoxides, polyepisulfides, as well as copolymers thereof and blends thereof.
  • thermoset layer 34 may be an Orma® (Essilor) substrate and the like, such as one obtained by (co)polymerizing bis allyl carbonate of diethylene glycol, marketed by PPG Industries as CR-39®.
  • the thickness of layer 32 and layer 34 may be similar (between 500pm and 1mm thick) or very different (e.g . one of the two layers having a thickness smaller than 400pm and the other one having a thickness greater than 1mm.
  • the lens element LI, L2 comprises a refraction area 12.
  • the refraction area 12 has a refractive power Px based on the prescription of the eye of the wearer, for example of the person for which the optical lens is adapted.
  • the prescription is for example adapted for correcting an abnormal refraction of the eye of the wearer of the optical lens.
  • the term “prescription” is to be understood to mean a set of optical characteristics of optical power, of astigmatism, of prismatic deviation, determined by an ophthalmologist or optometrist in order to correct the vision defects of the eye, for example by means of a lens positioned in front of his eye.
  • the prescription for a myopic eye comprises the values of optical power and of astigmatism with an axis for the distance vision.
  • the prescription may comprise an indication that the eye of the wearer has no defect and that no refractive power is to be provided to the wearer.
  • the refractive area is configured so as to not provide any refractive power.
  • the refraction area is preferably formed as the area other than the areas formed of the plurality of optical elements.
  • the refraction area is the complementary area to the areas formed of the plurality of optical elements.
  • the refraction area may comprise a plurality of respectively independent island-shaped areas.
  • each refraction island-shape area is within one optical element.
  • the refraction area 12 may comprise at least the central zone of the optical lens 10.
  • the central zone may have a characteristic dimension greater than 4 mm, for example greater than or equal to 8 mm and smaller than 22 mm, for example smaller than 20 mm, for example smaller than or equal to 12 mm.
  • the central zone is a circular zone centered on the reference point, for example the optical center, of the lens element and has a diameter greater than 4 mm, for example greater than or equal to 8 mm and smaller than 22 mm, for example smaller than 20 mm, for example smaller than or equal to 12 mm.
  • the central zone may be centered on a reference point of the optical lens 10.
  • the reference point on which the central zone may be centered is either one of a geometrical center and/or an optical center and/or a near vision reference point and/or a far vision reference point of the optical lens.
  • the central zone is centered on, or at least comprises a framing reference point that faces the pupil of the wearer gazing straight ahead in standard wearing conditions.
  • the wearing conditions are to be understood as the position of the optical lens with relation to the eye of a wearer, for example defined by a pantoscopic angle, a Cornea to lens distance, a Pupil-cornea distance, a center of rotation of the eye (CRE) to pupil distance, a CRE to lens distance and a wrap angle.
  • a pantoscopic angle for example defined by a pantoscopic angle, a Cornea to lens distance, a Pupil-cornea distance, a center of rotation of the eye (CRE) to pupil distance, a CRE to lens distance and a wrap angle.
  • the Cornea to lens distance is the distance along the visual axis of the eye in the primary position (usually taken to be the horizontal) between the cornea and the back surface of the lens; for example equal to 12mm.
  • the Pupil-cornea distance is the distance along the visual axis of the eye between its pupil and cornea; usually equal to 2mm.
  • the CRE to pupil distance is the distance along the visual axis of the eye between its center of rotation (CRE) and cornea; for example equal to 11.5mm.
  • the CRE to lens distance is the distance along the visual axis of the eye in the primary position (usually taken to be the horizontal) between the CRE of the eye and the back surface of the lens, for example equal to 25.5mm.
  • the pantoscopic angle is the angle in the vertical plane, at the intersection between the back surface of the lens and the visual axis of the eye in the primary position (usually taken to be the horizontal), between the normal to the back surface of the lens and the visual axis of the eye in the primary position; for example equal to -8°, preferably equal to 0°.
  • the wrap angle is the angle in the horizontal plane, at the intersection between the back surface of the lens and the visual axis of the eye in the primary position (usually taken to be the horizontal), between the normal to the back surface of the lens and the visual axis of the eye in the primary position for example equal to 0°.
  • An example of standard wearing condition may be defined by a pantoscopic angle of -8°, a Cornea to lens distance of 12 mm, a Pupil-cornea distance of 2 mm, a CRE to pupil distance of 11.5 mm, a CRE to lens distance of 25.5 mm and a wrap angle of 0°.
  • Another example of standard wearing condition more adapted for younger wearers may be defined by a pantoscopic angle of 0°, a Cornea to lens distance of 12 mm, a Pupil-cornea distance of 2 mm, a CRE to pupil distance of 11.5 mm, a CRE to lens distance of 25.5 mm and a wrap angle of 0°.
  • the central zone may comprise the optical center of the optical lens and have a characteristic dimension greater than 4mm - corresponding to +/- 8° peripheral angle on the retina side, and smaller than 22mm corresponding to +/- 44° peripheral angle on the retina side, for example smaller than 20 mm corresponding to +/- 40° peripheral angle on the retina side.
  • the characteristic dimension may be a diameter or the major or minor axes of an ellipse shaped central zone.
  • the refraction area 12 may comprise a continuous variation of refractive power.
  • the refractive area may have a progressive addition design.
  • the optical design of the refraction area may comprise a fitting cross where the optical power is negative, and a first zone extending in the temporal side of the refractive area when the lens element is being worn by a wearer. In the first zone, the optical power increases when moving towards the temporal side, and over the nasal side of the lens, the optical power of the ophthalmic lens is substantially the same as at the fitting cross.
  • Such optical design is disclosed in greater details in W02016/107919.
  • the refractive power in the refraction area 12 may comprise at least one discontinuity.
  • the optical lens LI, L2 comprises a plurality of optical elements 14 and a zone of interest 20 comprising a plurality of said optical elements 14.
  • At least 50%, for example at least 80%, for example all, of a surface of the optical element LI, L2 is covered by at least one layer of coating element.
  • the at least one layer of coating element may comprise features selected from the group consisting of anti-scratch, anti-reflection, anti-smudge, anti-dust, UV30 filtration, blue lightfiltration, anti-abrasion features.
  • the layer of coating element may be provided using any known techniques.
  • the layer of coating may be provided using a dipping process where the optical lens simultaneously receives a layer of coating on each surface.
  • the optical elements have a transparent optical function of not focusing an image on the retina of the eye of the wearer when the optical lens is worn in standard wearing conditions.
  • rays of light passing through the plurality of optical elements will not focus on the retina of the eye of the wearer.
  • the optical elements may focus in front and/or behind the retina of the eye of the wearer.
  • not focusing an image on the retina of the wearer allows creating a control signal that suppresses, reduces, or at least slows down the progression of abnormal refractions, such as myopia or hyperopia, of the eye of the person wearing the lens element.
  • an optical element is considered to have a transparent optical function when said optical element absorbs less than 50%, for example less than 20%, for example less than 5% of the light over the visible spectrum, i.e. 380 nm to 750 nm.
  • the optical elements may be of the form of lenslets providing an additional optical power relative to the refractive power based on the prescription of said eye of the person.
  • the optical elements are positioned along a plurality of concentric rings.
  • Each ring may consist of contiguous optical elements.
  • such configuration provides an excellent trade-off between the myopia control function of the optical elements and the visual acuity provided by the lens element.
  • the optical elements may be organized in groups of contiguous optical elements.
  • Each group of contiguous optical elements may be organized in concentric rings, for example at least 5 concentric rings, for example 11 concentric rings, having the same center.
  • the concentric ring of each group of contiguous optical elements being defined by an inner diameter corresponding to the smallest circle that is tangent to at least one optical element of said group and an outer diameter corresponding to the largest circle that is tangent to at least one optical element of said group.
  • the outer diameter of concentric rings of optical elements is comprised between 9.0 mm and 60 mm.
  • the distance between two successive concentric rings of optical elements is greater than or equal to 0.5 mm, for example greater than 1 mm, the distance between two successive concentric rings being defined by the difference between the outer diameter of a first concentric ring and the inner diameter of a second concentric ring, the second concentric ring being closer to the periphery of the lens element.
  • the optical elements are positioned according to a structured mesh, in the illustration of figure 3 such mesh is a hexagonal mesh, which allows a good trade-off between the myopia control function of the optical elements and the visual acuity provided by the lens element.
  • the mesh would also be a squared mesh.
  • At least 50%, for example at least 80%, for example at least 99%, of the optical elements are non-contiguous optical elements.
  • two optical elements are considered non-contiguous if there is no path between reference points, for example the centers, of the two optical elements that does not pass an area having the refractive power.
  • the optical elements have an annular shape limited by an inner diameter and outer diameter.
  • the optical elements correspond to part of pure cylindrical concentric rings.
  • the optical elements have constant power but a variable cylindrical axis.
  • the optical elements correspond to a set of torus concentric rings.
  • Each optical element has also a geometrical center. All the optical elements are positioned such that their geometrical center is at the same location, for example on the optical center of the lens element.
  • the width of the annular shapes and the distances separating 2 neighboring annular shapes impacts the trade-off between the myopia control function of the optical elements and the visual acuity provided by the lens element.
  • a lens element 10 comprises an object side surface Fl, for example formed as a convex curved surface toward an object side, and an eye side surface F2 for example formed as a concave surface having a different curvature than the curvature of the object side surface Fl.
  • At least part, for example all, of the optical elements may be located on the front surface of the lens element.
  • At least part, for example all, of the optical elements may be located on the back surface of the lens element.
  • At least part, for example all, of the optical elements may be located between the front and back surfaces of the lens element.
  • the lens element may comprise zones of different refractive indexes forming the optical elements as illustrated on figure 2B. Examples of such configuration are provided in WO2023104982A1.
  • At least one of the optical elements may have an optical function of focusing an image on a position other than the retina.
  • At least 50%, for example at least 80%, for example at least 99%, for example all, of the optical elements comprised in the lens element may have an optical function of focusing an image on a position other than the retina. All of the optical elements may be configured so that the mean focus of the light rays passing through each optical element is at a same distance to the retina of the wearer.
  • each optical element may be optimized so as to provide a focus image, for example in peripheral vision, at a constant distance of the retina of the eye of the wearer.
  • Such optimization requires adapting the dioptric function of each of the optical element depending on their position on the lens element.
  • the optical elements may be configured so that at least along one section, for example along at least 8 evenly spread sections, of the lens the average addition optical power of the optical elements varies monotonically from a point of said section at a distance smaller than 4.5 mm from the point of reference of the lens towards the periphery of said section at least to a point at 25mm from the point of reference of the lens element.
  • At least part of the optical elements for example at least 50%, for example at least 80%, for example at least 99%, for example all of the optical elements are mutifocal lenslets.
  • such multifocal lenslet may have a first optical power corresponding to the prescription and a second optical power different from the first optical power so as to focus light other than on the retina of the wearer.
  • At least 50%, for example at least 80%, for example at least 99%, for example all of the optical elements are diffractive lenslets, for example contiguous diffractive lenslets.
  • two optical elements are to be considered contiguous if there is a path linking the two optical elements all along which one may measure in standard wearing conditions at least one optical power different from the optical power based on the prescription of the wearer, for example for correcting an abnormal refraction of the eye of the wearer.
  • At least 50%, for example at least 80%, for example at least 99% for example all of the optical elements has discontinuities, such as a discontinuous surface, for example Fresnel surfaces and/or having a refractive index profile with discontinuities.
  • Pi -Fresnel lenslets examples include Pi -Fresnel lenslets.
  • At least 50%, for example at least 80%, for example at least 99% for example all of the optical elements are diffusive lenslets or scattering elements as disclosed in WO2022074243.
  • the ratio of the surface of the annular zone having an additional optical power greater than or equal to 7.5 diopters in absolute value and relative to the power at the reference point, for example optical center, of the lens element over the total surface of the annular zone is greater than or equal to 0.02, for example greater than or equal to 0.05, for example greater than or equal to 0.09 and smaller than or equal to 0.5, for example smaller than or equal to 0.3.
  • the absolute value of an optical power is the nonnegative value of said optical power without regard to its sign.
  • an additional optical power relative to the optical power at the reference point is to be understood as the optical power beyond the optical power at the reference point or at the vicinity of the reference point, for example the average optical power over a zone of 2 mm diameter, for example 1 mm diameter, for example 0.5 mm diameter, centered on the reference point.
  • the optical power may be determined using a two-dimension representation of the local optical power obtained, for example using a commercially available lens mapper such as the NIMOTM solutions proposed by the company Lambda-X.
  • annular zone extending up to 25 mm from the reference point while having important additional optical power within the second annular zone allows providing an even more efficient myopia control optical element in particular when the wearer is using the lens element for looking on the side.
  • one may identify an annular zone centered on a reference point, for example the optical center, of the lens element and having an inner diameter of 8 mm and an outer diameter of 36 mm, the ratio of the surface of the annular zone having an additional optical power greater than or equal to 7.5 diopters in absolute value and relative to the power at the reference point, for example optical center, of the lens element over the total surface of the annular zone is greater than or equal to 0.03, for example greater than or equal to 0.04, for example greater than or equal to 0.06 and smaller than or equal to 0.5, for example smaller than or equal to 0.3.
  • having an annular zone extending up to 36 mm from the reference point while having important additional optical power within the second annular zone allows providing an even more efficient myopia control optical element in particular when the wearer is using the lens element for looking on the side.
  • having a fourth annular zone extending from 17 mm up to 36 mm from the reference point while having important additional optical power within the second annular zone allows providing an even more efficient myopia control optical element in particular for peripherical vision.
  • having a fourth annular zone extending from 25 mm up to 36 mm from the reference point while having important additional optical power within the second annular zone allows providing an even more efficient myopia control optical element in particular for peripherical vision.
  • the annular zone(s) comprise(s) a plurality of sub-zones having an additional optical power greater than or equal to 7.5 diopters in absolute value and relative to the power at the reference point, for example optical center, of the lens, and at least 30 sub-zones , for example at least 40 sub-zones, for example each of the sub-zones, comprise a disk having a diameter of 0.3 mm.
  • such a configuration of the sub-zones assures that the parts of the lens element providing the additional power greater than or equal to 7.5 diopters are spread over the annular zone assuring an increase myopia control effect.
  • At least 50% of the sub-zones for example at least 80% of the sub-zones, for example at least 95% of the sub-zones have a difference of average additional optical power between a central area and a peripherical area, greater than or equal to 2 diopters, for example greater than or equal to 3 diopters and smaller than or equal to 7 diopters, for example smaller than or equal to 6.5 diopters.
  • the average additional optical power at the center area is determined for each sub-zone as the average additional optical power over a 0.2 mm diameter disk centered on the center of the disk of 0.3 diameter comprised in the sub-zone.
  • the average additional optical power at the peripherical area is determined for each sub-zone as the average additional power over an annular zone centered on said center of the disk of 0.3 diameter and having an interior diameter of 0.63 mm and an exterior diameter of 0.73 mm.
  • each sub-zone, the center of the disk of 0.3 mm diameter is distant for the center of the disk of 0.3 mm diameter of the other sub-zones of a distance greater than or equal to 0.8 mm.
  • the sub-zones are noncontiguous.
  • each sub-zone is within an optical element.
  • having a very important additional optical power, greater than or equal to 10 diopters, within the annular zone 22 allows providing a very efficient myopia control optical element.
  • having an annular zone extending up to 25 mm from the reference point while having important additional optical power within the second annular zone allows providing an even more efficient myopia control optical element in particular when the wearer is using the lens element for looking on the side.
  • having a fourth annular zone extending from 17 mm up to 25 mm from the reference point while having important additional optical power within the second annular zone allows providing an even more efficient myopia control optical element in particular for peripherical vision.
  • the annular zone(s) comprise(s) a plurality of sub-zones having an additional optical power greater than or equal to 10 diopters in absolute value and relative to the power at the reference point, for example optical center, of the lens, and at least 30 sub-zones , for example at least 40 sub-zones, for example each of the sub-zones, comprise a disk having a diameter of 0.15 mm.
  • such a configuration of the sub-zones assures that the parts of the lens element providing the additional power greater than or equal to 10 diopters are spread over the annular zone assuring an increase myopia control effect.
  • each sub-zone, the center of the disk of 0.3 mm diameter is distant for the center of the disk of 0.15 mm diameter is distant for the center of the disk of 0.3 mm diameter of the other sub-zones of a distance greater than or equal to 1 mm.
  • such distance between the sub-zones allows providing a good compromise between the myopia control function and the vision control function of the lens element.
  • the lens element provides good visual acuity and myopia control effect.
  • the sub-zones are noncontiguous.
  • each sub-zone is within an optical element.
  • any of the annular zone(s) comprise(s) may four complementary quadrants QI, Q2, Q3, Q4 each having a 90° angular sector, for example six complementary quadrants each having a 60° angular sector, for example eight complementary quadrants each having a 45° angular sector the ratio of surfaces defined for the annular zone(s) applied to each quadrant.
  • he ratio of the surface of the annular zone having an additional optical power greater than or equal to 7.5 diopters in absolute value and relative to the power at the reference point, for example optical center, of the lens element over the total surface of the annular zone is greater than or equal to 0.02, for example greater than or equal to 0.05, for example greater than or equal to 0.09 and smaller than or equal to 0.5, for example smaller than or equal to 0.3.
  • having the same ratio surfaces condition on each quadrant allows providing a more homogeneous distribution of the addition optical power. Therefore, the myopia control effect of the lens element is the same what ever part of the lens element the wearer is looking through.
  • the additional power distribution as defined with the annular zone applies to any lens myopia control lens and in particular to a lens element configuration as illustrated on figures 1 to 4.

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  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Eyeglasses (AREA)

Abstract

L'invention concerne un élément de lentille de régulation de myopie A, destiné à être porté devant un œil d'une personne comprenant : - une zone de réfraction ayant une puissance réfractive basée sur une prescription pour ledit œil de la personne ; et - une pluralité d'éléments optiques réfractifs ayant une fonction optique différente de la fonction optique de la zone de réfraction, dans lequel sur une zone annulaire centrée sur un point de référence, par exemple le centre optique, de l'élément de lentille et ayant un diamètre interne de 8 mm et un diamètre externe de 17 mm, le rapport de la surface de la zone annulaire ayant une puissance optique supplémentaire supérieure ou égale à 7,5 dioptries en valeur absolue et par rapport à la puissance au point de référence, par exemple le centre optique, de l'élément de lentille sur la surface totale de la zone annulaire est supérieur ou égal à 0,02, par exemple supérieur ou égal à 0,05, par exemple supérieur ou égal à 0,09 et inférieur ou égal à 0,5, par exemple inférieur ou égal à 0,3.
PCT/EP2024/085166 2023-12-08 2024-12-06 Élément de lentille de régulation de myopie Pending WO2025037042A2 (fr)

Applications Claiming Priority (2)

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EP23307165.3 2023-12-08
EP23307165 2023-12-08

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WO2025037042A2 true WO2025037042A2 (fr) 2025-02-20
WO2025037042A3 WO2025037042A3 (fr) 2025-04-17

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016107919A1 (fr) 2014-12-31 2016-07-07 Essilor International (Compagnie Generale D'optique) Lentille ophtalmique de lunettes destinée à être montée sur une monture de lunettes
US20170131567A1 (en) 2015-11-06 2017-05-11 Hoya Lens Thailand Ltd. Spectacle Lens
WO2019166657A1 (fr) 2018-03-01 2019-09-06 Essilor International Élément de lentille
WO2019206569A1 (fr) 2018-04-26 2019-10-31 Essilor International Élément verre
WO2021001524A1 (fr) 2019-07-04 2021-01-07 Essilor International Système optique
WO2021198362A1 (fr) 2020-03-31 2021-10-07 Essilor International Élément de lentille
WO2022074243A1 (fr) 2020-10-09 2022-04-14 Essilor International Lentille optique à zone de diffusion continue
WO2023104982A1 (fr) 2021-12-10 2023-06-15 Essilor International Lentille ophtalmique et procédé de formation d'une lentille ophtalmique

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG10201400920RA (en) * 2014-03-24 2015-10-29 Menicon Singapore Pte Ltd Apparatus and methods for controlling axial growth with an ocular lens
CA3192049A1 (fr) * 2020-08-21 2022-02-24 Brien Holden Vision Institute Limited Dispositifs ophtalmiques, systemes et/ou procedes de gestion de conditions oculaires et/ou de reduction de troubles de la vision nocturne
CN117460984A (zh) * 2021-06-30 2024-01-26 依视路国际公司 透镜元件
CN223377564U (zh) * 2022-02-16 2025-09-23 卡尔蔡司光学国际有限公司 用于减缓近视进展的眼镜片
WO2023175193A2 (fr) * 2022-03-18 2023-09-21 Carl Zeiss Vision International Gmbh Lentille revêtue et son procédé de fabrication

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016107919A1 (fr) 2014-12-31 2016-07-07 Essilor International (Compagnie Generale D'optique) Lentille ophtalmique de lunettes destinée à être montée sur une monture de lunettes
US20170131567A1 (en) 2015-11-06 2017-05-11 Hoya Lens Thailand Ltd. Spectacle Lens
WO2019166657A1 (fr) 2018-03-01 2019-09-06 Essilor International Élément de lentille
WO2019166659A1 (fr) 2018-03-01 2019-09-06 Essilor International Élément de lentille
WO2019206569A1 (fr) 2018-04-26 2019-10-31 Essilor International Élément verre
WO2021001524A1 (fr) 2019-07-04 2021-01-07 Essilor International Système optique
WO2021198362A1 (fr) 2020-03-31 2021-10-07 Essilor International Élément de lentille
WO2022074243A1 (fr) 2020-10-09 2022-04-14 Essilor International Lentille optique à zone de diffusion continue
WO2023104982A1 (fr) 2021-12-10 2023-06-15 Essilor International Lentille ophtalmique et procédé de formation d'une lentille ophtalmique

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