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WO2009150265A1 - Verre progressif à deux faces - Google Patents

Verre progressif à deux faces Download PDF

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Publication number
WO2009150265A1
WO2009150265A1 PCT/ES2009/000240 ES2009000240W WO2009150265A1 WO 2009150265 A1 WO2009150265 A1 WO 2009150265A1 ES 2009000240 W ES2009000240 W ES 2009000240W WO 2009150265 A1 WO2009150265 A1 WO 2009150265A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
progressive
vision
carved
aberrations
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/ES2009/000240
Other languages
English (en)
Spanish (es)
Inventor
Reyes LÓPEZ HERNÁNDEZ
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2009150265A1 publication Critical patent/WO2009150265A1/fr
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
    • G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
    • G02C7/061—Spectacle lenses with progressively varying focal power
    • G02C7/068—Special properties achieved by the combination of the front and back surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/10—Bifocal lenses; Multifocal lenses
    • 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
    • G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
    • G02C7/061—Spectacle lenses with progressively varying focal power

Definitions

  • the present invention relates to a two-sided progressive lens that provides essential novelty characteristics and notable advantages over the means known and used in the state. Current technique for the same purposes.
  • the invention proposes the development of a progressive action lens conceived in accordance with. a configuration and design that allow elii ⁇ ina3r to completely aberrate / while improving near vision and progressive vision width-
  • the lens proposed by the invention is carved so that on one side a conventional development follows, while than in the another face is carved so that the widths are widened, both at medium distance or zone of progression and at close range, and the bull for the elimination of the aberrations of the other face, both sides being complementary.
  • the scope of the invention is within the sector dedicated to the manufacture of. contact lenses and optical material, especially lenses of the type known as "progressive.”
  • accommodation When the eye tries to see objects that are within limits of proximity to it, it is necessary to put in place the mechanism known as "accommodation.”
  • This fact consists in the performance of the ciliary muscles to vary the thickness of the lens of the eye to effects of increasing the potency thereof, and allowing an image of a near point to be formed in the retina and can be seen clearly.
  • presbyopia This optical condition in which due to the changes produced by age, there is an irreversible decrease in the power of accommodation, is known as presbyopia. It is therefore a physiological condition, not pathological, which begins to manifest normally when the age of 40-45 years is exceeded.
  • the solution to correct this problem is the use of appropriate glasses.
  • Various types of glasses have been used, such as half-moon glasses, conventional glasses with near graduation, bifocals, progressive glasses or even contact lenses.
  • the progressive glasses are a good solution so that the affected can achieve the desired accommodation when it comes to seeing closely, because due to their own conception, they not only allow us to see closely, but also achieve a clear vision at any distance by varying simply the position of the user's head or eyes, just look at the top of the lens to see from afar, and from below to see closely, varying the graduation between means and thus allowing distance viewing intermediate; progressive lenses are therefore the closest solution to what was the natural vision before the problem of presbyopia. But nevertheless, Although they are currently the most comfortable and best achieved solution, they are not therefore exempt from other inconveniences, such as a somewhat vague side view, and are also affected by optical aberrations that would be desirable to eliminate.
  • Progressive lenses are characterized by having three optimally useful areas; the area destined for far vision (VL), located in the upper part of the lens and corresponding its power to the prescription of the subject, the area destined for near vision (VC), located in the lower part of the lens and its power corresponding to the power necessary to counteract the effect of presbyopia, and the zone that communicates both previous zones, called a progressive corridor or corridor (VI), in which the power varies continuously by linking the powers of both zones.
  • VL far vision
  • VC near vision
  • VIP progressive corridor or corridor
  • Progressive lenses are lenses carved so that the separations are invisible, and are generally characterized by stabilized powers in both VL and VC.
  • US Patent 2005146682 which discloses a lens that has two active faces: one on the side of the eyeball, and the other located on the opposite or objective side, consisting of a composite surface formed by an initial progressive refractive surface, adjusted to incorporate a characteristic, specific vision correction, and an initial toric surface, adjusted to incorporate an astigmatism correction characteristic.
  • Japanese Patent JP 53036251 which describes the manufacturing process of one. progressive focal lens, which has an astigmatism correction function according to which respective portions of lens adhere to each other, which have progressive focal lens and single focus lens functions, the first being made of a material organic, and presenting the second of them an toric face with a unique focus.
  • Patent ES-2112182 describes a progressive multifocal ophthalmic lens in which the width of the near vision zone varies depending on the power increase of the lens, as well as depending on the value of the base or value. of the median sphere at a certain point in the far vision area.
  • a progressive ophthalmic lens is described, one of whose two surfaces Refractive is a spherical or toric surface, and whose other refractive surface determines, with the first refractive surface, a portion of the far vision lens with a corrected focal power for the aberrations that are specific to the far vision, a portion of the vision lens near, with a second higher focal power, corrected for specific aberrations of near vision and, among them, a portion of intermediate vision lens, with a focal power that progressively varies from said first focal power to said second higher focal power, said portion of intermediate vision also being corrected with respect to the aberrations proper to the vision of an approaching object.
  • the present invention has proposed as its main objective the design and development of a progressive lens with which effective solutions to the problems posed are provided. This objective has been achieved by means of the progressive two-sided lens that will be described in the following, whose main characteristics are included in the characterizing portion of claim 1 that follows.
  • the proposed lens allows, as stated above, to achieve advantageous and favorable effects that include the total elimination of aberrations, and the improvement of both near vision and average vision as well as the width of view.
  • These objectives have been achieved thanks to the advantageous design with which both faces have been carved, so that, on one side, the carving of the progressive lens is carried out according to the conventional manner, and by the other side the carving is directed to achieve an extension of the widths, both of medium distance or zone of progression and of near, in which the bull is realized so that the aberrations of the other face are eliminated.
  • Figure 1 shows two schematic views (a, b), in front elevation, representative of the three viewing areas of the lens conceived according to the invention.
  • Figure 2 shows a schematic view of the resulting power map and obtained by the design d.e Tiente conceived in accordance with this invention.
  • the areas of distant, close and progressive vision of the lens on both sides are appreciated.
  • the configuration of this lens is obtained by carving on one of the faces a conventional progressive lens, while on the other side the widening of the widths of the progressive and ole areas is carved, as well as the bull that achieves the elimination of aberrations on the other side Figure 2, meanwhile, reflects the lens power map.
  • the extension of the middle or progressive distance is achieved by carving a progressive flattening in the meridian of the lens to the same axis of the bull that eliminates the aberrations, being able to achieve, for example, that the width of the outer face passes from 2 mm to the 20 mm inner face, the flattening being variable in this area. Therefore, the medium distance zone has a variable width and height, to avoid astigmatisms and aberrations by virtue of the incorporated toric section.
  • the widening of the near width is achieved very similar to the average distance, since It is a continuity of it.
  • the case in which the outer face has a width of 14 ⁇ e is cited, and is flattened on the inner face in the corresponding meridian with respect to the axis of the bull, turned 90 ° is a crossed cylinder and becomes a sphere having separated 6 mm on each side of the 14 rom that has the outer face.
  • the size of the near vision zone may be chosen as appropriate, being completely free of astigmatisms and aberrations.
  • extension zones can be increased more simply by giving them more prism, always depending on the needs and demands of the users.
  • this two-sided lens that is, with the combination of both, the total elimination of aberrations is achieved, and the improvement of near vision and progressive vision width with a width of 28 mm and 20 mm, respectively.

Landscapes

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

Abstract

L'invention concerne un verre progressif à deux faces au moyen duquel il est possible d'obtenir une amélioration substantielle tant de la vision de près et de la vision à moyenne distance que de la largeur du champ de vision. Pour cela, le verre de l'invention présente un taillage de verre progressif sur une de ses faces, et un taillage de tore conique sur l'autre face, identique à celui de la face antérieure, sur lequel il se superpose au niveau du rayon et de l'axe. L'accroissement de la moyenne distance ou progression et l'accroissement de la largeur du champ de vision de près sont obtenus par le taillage d'un aplanissement progressif réalisé au niveau du méridien du verre, sur le même axe.
PCT/ES2009/000240 2008-06-13 2009-05-06 Verre progressif à deux faces Ceased WO2009150265A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP200801864 2008-06-13
ES200801864 2008-06-13

Publications (1)

Publication Number Publication Date
WO2009150265A1 true WO2009150265A1 (fr) 2009-12-17

Family

ID=41416394

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2009/000240 Ceased WO2009150265A1 (fr) 2008-06-13 2009-05-06 Verre progressif à deux faces

Country Status (1)

Country Link
WO (1) WO2009150265A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3687528A (en) * 1969-09-11 1972-08-29 Lunetiers Ophthalmic lenses with a progressively varying focal power
US5805260A (en) * 1995-05-04 1998-09-08 Johnson & Johnson Vision Products, Inc. Combined multifocal toric lens designs
US6123422A (en) * 1998-10-23 2000-09-26 Johnson & Johnson Vision Care, Inc. Methods for producing progressive addition lenses
US20040021824A1 (en) * 2002-07-31 2004-02-05 Ming Ye Toric multifocal contact lenses
US20050146682A1 (en) * 2003-04-02 2005-07-07 Tadashi Kaga Progressive multifocal lens and method of designing the same
EP1688781A1 (fr) * 2005-02-04 2006-08-09 Seiko Epson Corporation Verre de lunettes combiné, verre additionnel, et procédé de débordage des verres

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3687528A (en) * 1969-09-11 1972-08-29 Lunetiers Ophthalmic lenses with a progressively varying focal power
US5805260A (en) * 1995-05-04 1998-09-08 Johnson & Johnson Vision Products, Inc. Combined multifocal toric lens designs
US6123422A (en) * 1998-10-23 2000-09-26 Johnson & Johnson Vision Care, Inc. Methods for producing progressive addition lenses
US20040021824A1 (en) * 2002-07-31 2004-02-05 Ming Ye Toric multifocal contact lenses
US20050146682A1 (en) * 2003-04-02 2005-07-07 Tadashi Kaga Progressive multifocal lens and method of designing the same
EP1688781A1 (fr) * 2005-02-04 2006-08-09 Seiko Epson Corporation Verre de lunettes combiné, verre additionnel, et procédé de débordage des verres

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