EP2659304A1 - Verre correcteur pour correction d'une amétropie, lunettes et procédé de fabrication du verre correcteur - Google Patents

Verre correcteur pour correction d'une amétropie, lunettes et procédé de fabrication du verre correcteur

Info

Publication number
EP2659304A1
EP2659304A1 EP10800759.2A EP10800759A EP2659304A1 EP 2659304 A1 EP2659304 A1 EP 2659304A1 EP 10800759 A EP10800759 A EP 10800759A EP 2659304 A1 EP2659304 A1 EP 2659304A1
Authority
EP
European Patent Office
Prior art keywords
correction
vision
lens
glass
user
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
EP10800759.2A
Other languages
German (de)
English (en)
Inventor
Thomas Wedershoven
Klaus Wehmeyer
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.)
DEUTSCHE AUGENOPTIK AG
Original Assignee
Mailshop Augenoptik 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 Mailshop Augenoptik GmbH filed Critical Mailshop Augenoptik GmbH
Publication of EP2659304A1 publication Critical patent/EP2659304A1/fr
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
    • 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 correction lens for correcting a defective vision, a pair of spectacles and a method for producing the correction lens.
  • a pair of glasses normally comprises two lenses, so-called correction lenses, each with two surfaces for the correction of a defective vision of a spectacle wearer.
  • Defective vision of a spectacle wearer is described by a rotationally symmetric component, the spherical refractive error, and / or a non-rotationally symmetric component, the so-called astigmatism and the alignment of this astigmatism, the so-called axial position.
  • ametropia is normally sufficiently described.
  • This presbyopia the effects of which are felt from an age of early 40, is compensated by the fact that the effect of the respective correction lens increases towards the bottom, that is progressive. In the case of a progressive lens, therefore, the effect differs in the upper and lower half of the spectacle lens. The difference is the so-called addition.
  • the Alterss' twisted or presbyopia is corrected by so-called bifocal glasses that had a near zone in the lower half lens whose optical effect was designed to close. Also its effect was higher by the addition, than the effect in the far range.
  • a progressive lens for correction of presbyopia includes a far vision area (upper half of the eyeglass lens) and a near vision area (lower half of the eyeglass lens) connected by a transition area for the mean distances (progression zone).
  • the near-vision region is arranged in such a way that the view of the spectacle wearer in the case of near vision, for example when reading in a book, passes through the near-vision region.
  • the correction in this near-vision area is designed in such a way that the presbyopia of the spectacle wearer is corrected in the near-sightedness.
  • the industrial production of user-specific correction lenses is typically based on a preformed, so-called raw lens, in which the first surface is finished and the second surface is left in a raw state. In a subsequent operation, the second surface is then processed according to the specific requirements of the spectacle wearer.
  • EP 0677177 B1 discloses a correction lens for correcting presbyopia with a rotationally symmetric first surface and a user-specifically processed second surface.
  • the second surface is designed in such a way that astigmatism in the near-vision region has the same effect as astigmatism in the far-vision region, whereby a regularity of human physiology (eye movements according to Listing's rule) is taken into account in the design of the surface.
  • the object of the present invention is to specify an improved correction lens for the correction of defective vision, a pair of spectacles and a method for producing the correction lens.
  • the present invention relates to a correction glass having a rotationally symmetrical first surface and a second surface, which has a Nahsicht Scheme for the correction of a presbyopia and a separate distant vision area.
  • the shape of the surface of the near-vision region is formed in accordance with a surface function which depends on a parameter which corresponds to a user-specific predetermined astigmatism, so that in addition a user-specific Nahastigmatismus is corrected in the near vision region.
  • this correction achieves an improvement in the visual performance of the spectacle wearer in the case of near vision.
  • glass refers to a substantially transparent or translucent element, for example an optical lens.
  • This "glass” can consist of a variety of materials, such as mineral glass, plastic, crystal-like materials.
  • the shape of the correction glass corresponds to that of a generally known spectacle lens or an optical lens, that is to say the correction lens is essentially disc-shaped with a relatively thin edge which is arranged between a first surface and a second surface.
  • the surfaces are opposite each other and allow the viewing of the wearer of the spectacle or a passage of the light rays from a viewed object to the eye of the spectacle wearer. Typically, the surfaces are concave, convex or flat.
  • the first surface is rotationally symmetrical and usually corresponds to the finished first surface of a raw lens.
  • the second surface is intended for further processing, namely adaptation to the specific requirements of the user.
  • the correction glass can thus be produced in one operation, ie without a change of the surface to be processed.
  • the inventive correction glass is thus suitable for processing in a two-stage process, which starts from prefabricated raw lenses. As a result, a precise, efficient and thus cost-effective production is achieved.
  • the presbyopia not only the presbyopia but also, in addition, a user-specific Nahastigmatismus corrected in Nahsicht Scheme.
  • the term "astigmatism” - also known as “astigmatism” - refers to an aberration in which a point-like object is imaged not on a point but on an oblong or rod-shaped appearance. In this case, it is typically possible to determine a specific orientation of the oblong appearance and thus a direction of the aberration, the so-called axial position of the astigmatism. In one eye, this astigmatic aberration leads to a reduced visual acuity.
  • the second surface of the Nahsicht Schemes is formed according to the predetermined user-specific requirements, for example in the form of a progressively toric or atorischen surface.
  • this form of the surface of the previously described form of the surface is superimposed for the correction of ametropia or presbyopia.
  • the shape of the surface of the near-vision region is described by a surface function, for example by a deviation of the surface with respect to a reference surface being described by the surface function.
  • the reference surface can be specified in a variety of ways, for example as a planar surface with respect to a given coordinate system, as a surface of the first surface or as a second surface of a raw lens.
  • a position on the surface may be defined as a difference with respect to the reference surface or as a z-direction with respect to an x / y plane in a Cartesian coordinate system.
  • a point on the reference surface can be defined by a value on an x-axis and a value on a y-axis.
  • other coordinate systems such as polar coordinates can also be used.
  • the area function is not only dependent on the refractive error of the spectacle wearer, but additionally also on a predetermined parameter, which corresponds to the user-specific predetermined Nahastigmatismus.
  • the parameter may include various information on the strength and / or the orientation, for example the radii of the strongest and the weakest curvature of an atoric surface.
  • dz F (P Bl NAB, x, y)
  • dz is the surface deviation from the reference surface
  • PB is a presbyopia parameter
  • NAB is the user-specific Nahastigmatism parameter
  • x is a value on the x-axis
  • y is a value on the y-axis
  • the user-specific astigmatism in the vicinity can be treated independently of astigmatism in the vicinity. It is also conceivable that there is no or only negligible astigmatism when looking into the distance, so that only an astigmatism in the vicinity is corrected by the correction lens.
  • the correction lens is designed as a so-called plane glass in which no optical correction is made in the distance vision area.
  • the parameter is designed such that it corresponds to the strength and / or axis position of the Nahastigmatismus.
  • the area function is formed continuously, in particular continuously differentiable.
  • This continuous course avoids step-like transitions of adjacent areas on the surface and thus disruptive paragraphs.
  • the correction lens is a multi-intensity lens, in particular a bifocal lens or a progressive lens.
  • a progressive addition also referred to as progressive-effect glass or progressive glass, also offers an intermediate region which connects the near-vision region and the far-vision region by continuously changing the shape of the second surface, so that a smooth transition results for the spectacle wearer when switching between near vision and distance vision.
  • the femoral vision area is designed such that it is used to correct a user-specific spherical refractive error, in particular a myopia or hyperopia. This combination allows precise adjustments to the user-specific requirements.
  • the far-vision region is designed such that it is used to correct a user-specific astigmatism, in particular its strength and / or axis position.
  • a user-specific astigmatism in particular its strength and / or axis position.
  • an astigmatism of the user and additionally the Nahastigmatismus can be considered and in particular the transition between far vision and Nahsicht Scheme be designed according to physiological conditions.
  • the axial position of the Nahastigmatismus is different from the axis position of the astigmatism in the distance.
  • the respective acting axis position can be optimally adapted to the user-specific circumstances.
  • the first surface is spherical.
  • the correction glass is produced by the free-forming method.
  • the correction lens can be efficiently and precisely adapted to almost any optical and / or geometric requirements.
  • the present invention relates to spectacles with at least one of the aforementioned correction lens according to the invention. If only one eye of the spectacle wearer is affected by a Nahastigmatismus, a single inventive correction lens is sufficient. As a rule, however, a bilateral Nahastigmatismus occurs, so that two of the correction glasses according to the invention are required, namely one for the left and one for the right eye.
  • the above-mentioned object is achieved by a method for producing a correction lens according to the invention.
  • the method is characterized by:
  • the correction lens according to the invention can be produced both precisely and efficiently and thus cost-effectively. It is expressly understood that any combination of the foregoing examples and embodiments or combinations of combinations may be subject to further combination. Only those combinations are excluded that would lead to a contradiction.
  • Fig. 1 is a schematic representation of an inventive optical correction glass 1
  • Fig. 2 is a schematic representation of a pair of spectacles 10 with the correction glass 1 according to
  • Fig. 1 shows a schematic representation of an inventive correction lens 1 for the correction of presbyopia.
  • the correction lens 1 is substantially disc-shaped with a relatively thin edge disposed between a first surface 2 and a second surface 3.
  • the two surfaces 2 and 3 face each other and allow a view of the wearer of the glasses through the correction glass 1, or equivalently, a beam path, that is, a passage of light rays, from a viewed object to the eye of the wearer.
  • a direction for the beam path is predetermined (double arrow), so that the beams first enter through the first surface 2 in the correction glass 1 and subsequently leave the correction lens 1 through the second surface 3.
  • the first surface 2 appears as that of the viewer of FIG. 1 facing surface.
  • the terms "up” and “down” correspond to the direction of gravity when the correction lens is inserted into a pair of glasses and the glasses are worn by the wearer of the glasses.
  • the second surface 3 comprises a near vision area 4 for correction of a presbyopia and a remote vision area 5 separated therefrom.
  • the distance vision area 5 is arranged in the upper and central area of the second surface 3, so that in the case of long distance vision, that is, if more than approx m distant object, the view or the beam path through the distance vision area 5 extends.
  • the near-vision region 4, is arranged laterally and below the far-vision region 5, so that the view of the spectacle wearer or the ray path through the near vision region 4 extends in the case of near vision, that is to say when viewing an object less than about 1 m away.
  • the surface shape of the near vision region 4 is defined by a surface function F with respect to a Cartesian coordinate system.
  • the x / y coordinates of the coordinate system define a reference plane, which is represented in FIG. 1 by corresponding x-axes and y-axes.
  • the surface functional form has the following functional expression:
  • dz is the deviations from the reference surface
  • PB is a presbyopic parameter
  • NAB is a parameter of user-specific Nahastigmatismus
  • x is a value on the x-axis
  • y is a value on the y-axis.
  • the beam path passes through the distance vision region 5, so that a spherical refractive error of the spectacle wearer can be corrected by the surface shape in this region, for example a nearsightedness.
  • a spherical refractive error of the spectacle wearer can be corrected by the surface shape in this region, for example a nearsightedness.
  • the correction lens 1 for the right eye and a correction lens for the left eye of the wearer can be constructed and used.
  • FIG. 2 shows a schematic representation of a pair of spectacles 10, with a right-hand correction lens 1 according to FIG. 1 and with a left-hand correction lens 11.
  • the two correction lenses 1 and 11 are of similar construction, but they are each adapted for correcting a Nahastigmatismus the right eye or of the left eye.
  • Either the right-hand correction lens 1 or the left-hand correction lens 11 could also be a spectacle lens without correction of a Nahastigmatismus, in particular a neutral spectacle lens without any corrections.

Landscapes

  • 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

La présente invention concerne un verre correcteur (1) destiné à la correction d'une amétropie, doté d'une première surface (2) à symétrie de révolution et d'une deuxième surface (3) présentant une zone pour la vision de près (4) destinée à la correction de l'astigmatisme de près et une zone pour la vision de loin (5), séparée de la première zone. Selon l'invention, la forme de la surface de la zone pour la vision de près (4) est conçue selon une fonction surfacique (F) dépendant d'un paramètre (NAB) correspondant à un astigmatisme de près donné, spécifique de l'utilisateur, de sorte que l'astigmatisme de près est corrigé dans la zone pour la vision de près (4). Le verre correcteur (1) objet de l'invention peut être conçu comme verre unifocal ou comme verre progressif ou bifocal.
EP10800759.2A 2010-12-27 2010-12-27 Verre correcteur pour correction d'une amétropie, lunettes et procédé de fabrication du verre correcteur Ceased EP2659304A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2010/070750 WO2012089234A1 (fr) 2010-12-27 2010-12-27 Verre correcteur pour correction d'une amétropie, lunettes et procédé de fabrication du verre correcteur

Publications (1)

Publication Number Publication Date
EP2659304A1 true EP2659304A1 (fr) 2013-11-06

Family

ID=44533267

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10800759.2A Ceased EP2659304A1 (fr) 2010-12-27 2010-12-27 Verre correcteur pour correction d'une amétropie, lunettes et procédé de fabrication du verre correcteur

Country Status (2)

Country Link
EP (1) EP2659304A1 (fr)
WO (1) WO2012089234A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015205721B4 (de) 2015-03-30 2017-01-19 Rodenstock Gmbh Verfahren zum Erstellen eines Designs einer Rezeptfläche einer Multifokallinse und Multifokallinse mit einer solchen Rezeptfläche
WO2017178452A1 (fr) * 2016-04-15 2017-10-19 Essilor International (Compagnie Generale D'optique) Procédé de fourniture de lentille ophtalmique à un porteur
EP3457195A1 (fr) * 2017-09-19 2019-03-20 Hoya Lens Thailand Ltd. Verres de lunettes et leurs procédés de production

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4337369A1 (de) 1993-11-02 1995-05-04 Rodenstock Optik G Brillenglas mit progressiver Wirkung
DE19701312A1 (de) * 1997-01-16 1998-07-23 Zeiss Carl Fa Brillenglas mit sphärischer Vorderseite und multifokaler Rückseite, sowie Verfahren zu seiner Herstellung
US6802607B2 (en) * 2002-10-31 2004-10-12 Johnson & Johnson Vision Care, Inc. Progressive cylinder ophthalmic lenses
FR2858693B1 (fr) * 2003-08-08 2005-10-28 Essilor Int Procede de determination d'une lentille ophtalmique utilisant une prescription d'astigmatisme en vision de loin et en vision de pres
WO2008089996A1 (fr) * 2007-01-25 2008-07-31 Rodenstock Gmbh Optimiseur flexible de verres progressifs

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2012089234A1 *

Also Published As

Publication number Publication date
WO2012089234A1 (fr) 2012-07-05

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