CA2250568A1 - Multifocal ophthalmic lens - Google Patents

Multifocal ophthalmic lens

Info

Publication number
CA2250568A1
CA2250568A1 CA 2250568 CA2250568A CA2250568A1 CA 2250568 A1 CA2250568 A1 CA 2250568A1 CA 2250568 CA2250568 CA 2250568 CA 2250568 A CA2250568 A CA 2250568A CA 2250568 A1 CA2250568 A1 CA 2250568A1
Authority
CA
Canada
Prior art keywords
lens
vision region
progression
multifocal ophthalmic
cylinder
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.)
Granted
Application number
CA 2250568
Other languages
French (fr)
Other versions
CA2250568C (en
Inventor
Thierry Baudart
Francoise Ahsbahs
Christian Miege
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
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9512330&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2250568(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of CA2250568A1 publication Critical patent/CA2250568A1/en
Application granted granted Critical
Publication of CA2250568C publication Critical patent/CA2250568C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G02C7/063—Shape of the progressive surface
    • 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

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)
  • Prostheses (AREA)

Abstract

In a multifocal ophthalmic lens comprising an aspherical surface having at every point thereon a mean sphere and a cylinder, a far vision region, a near vision region, and an intermediate vision region, the length of progression i.e. the length over which lens power varies by a set amount in different regions of the lens, is short. To avoid distortion at the periphery of the lens which this would otherwise occasion, the isosphere and isocylinder lines are distributed over the surface of the lens so as to ensure variations in sphere are not too sudden along a 20 mm radius circle centered on the geometric center of the lens and variations in cylinder on the surface of the lens inside this circle are also very small. The lens has an enlarged near vision region and progression is less perceptible to the wearer.
CA 2250568 1997-10-16 1998-10-15 Multifocal ophthalmic lens Expired - Lifetime CA2250568C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9712990 1997-10-16
FR9712990A FR2770000B1 (en) 1997-10-16 1997-10-16 MULTIFOCAL OPHTHALMIC LENS

Publications (2)

Publication Number Publication Date
CA2250568A1 true CA2250568A1 (en) 1999-04-16
CA2250568C CA2250568C (en) 2007-06-26

Family

ID=9512330

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2250568 Expired - Lifetime CA2250568C (en) 1997-10-16 1998-10-15 Multifocal ophthalmic lens

Country Status (9)

Country Link
EP (1) EP0911670B1 (en)
JP (1) JP4602493B2 (en)
CN (1) CN1163780C (en)
AU (1) AU741951B2 (en)
BR (1) BR9804425B1 (en)
CA (1) CA2250568C (en)
DE (1) DE69801629T2 (en)
ES (1) ES2165134T3 (en)
FR (1) FR2770000B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6325508B1 (en) 1999-09-24 2001-12-04 Essilor International Visual equipment for checking close vision working distance

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6343861B1 (en) † 1998-06-12 2002-02-05 Sola International Holdings, Ltd. Myopia lens
US6390623B1 (en) 2000-03-29 2002-05-21 Johnson & Johnson Vision Care, Inc. Customized progressive addition lenses
JP2004502963A (en) * 2000-04-25 2004-01-29 オプティッシュ．ウエルケ．ゲー．ローデンストック Progressive spectacle lens with low shaking movement
US6802607B2 (en) * 2002-10-31 2004-10-12 Johnson & Johnson Vision Care, Inc. Progressive cylinder ophthalmic lenses
JP3582527B1 (en) * 2003-04-10 2004-10-27 セイコーエプソン株式会社 Progressive power lens and manufacturing method
FR2858693B1 (en) 2003-08-08 2005-10-28 Essilor Int METHOD FOR DETERMINING AN OPHTHALMIC LENS USING AN ASTIGMATISM PRESCRIPTION IN VIEW OF FAR AND IN VISION OF PRES
DE10339948A1 (en) * 2003-08-29 2005-04-28 Rodenstock Gmbh Fault-tolerant progressive glass design
DE10349726A1 (en) 2003-10-23 2005-06-09 Rodenstock Gmbh Workplace screen lens
FR2884325B1 (en) * 2005-04-08 2007-06-01 Essilor Int OPHTHALMIC LENS
FR2884622B1 (en) 2005-04-19 2007-08-10 Essilor Int OPHTHALMIC GLASS COMPRISING A VARIABLE REFRACTION INDEX LAYER
FR2888344B1 (en) 2005-07-11 2007-09-14 Essilor Int OPHTHALMIC LENS
FR2893151B1 (en) 2005-11-08 2008-02-08 Essilor Int OPHTHALMIC LENS.
FR2894038B1 (en) * 2005-11-29 2008-03-07 Essilor Int OPHTHALMIC LENS.
FR2895092B1 (en) 2005-12-16 2008-02-29 Essilor Int METHOD FOR DETERMINING AN OPHTHALMIC LENS
FR2928744B1 (en) 2008-03-11 2012-03-16 Essilor Int SERIES OF PROGRESSIVE OPHTHALMIC LENSES
PL2874785T3 (en) * 2012-07-20 2017-05-31 Essilor International (Compagnie Générale d'Optique) Method for processing an unfinished optical lens member for manufacture of an optical lens
CN102749723A (en) * 2012-07-26 2012-10-24 苏州苏大明世光学有限公司 Blind zone optimized progressive eye lens and mold thereof
CN102768414B (en) * 2012-07-30 2013-09-25 上海理工大学 Design method for novel multi-optical axis progressive multi-focal lens
CN103926711B (en) * 2013-01-14 2016-10-05 九扬贸易有限公司 Control the optical glass that axis oculi increases
CN112505948A (en) * 2020-11-27 2021-03-16 江苏圣谱光学技术有限公司 Progressive multi-focus lens based on sine curve and design method thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2683642B1 (en) * 1991-11-12 1994-01-14 Essilor Internal Cie Gle Optique PROGRESSIVE MULTIFOCAL OPHTHALMIC LENS.
FR2699294B1 (en) * 1992-12-11 1995-02-10 Essilor Int Progressive multifocal ophthalmic lens.
FR2733328B1 (en) * 1995-04-21 1997-06-13 Essilor Int PROGRESSIVE MULTIFOCAL OPHTHALMIC LENS
FR2769998B1 (en) * 1997-10-16 1999-12-31 Essilor Int MULTIFOCAL OPHTHALMIC LENS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6325508B1 (en) 1999-09-24 2001-12-04 Essilor International Visual equipment for checking close vision working distance

Also Published As

Publication number Publication date
AU741951B2 (en) 2001-12-13
ES2165134T3 (en) 2002-03-01
DE69801629T2 (en) 2002-06-27
BR9804425A (en) 1999-11-03
FR2770000B1 (en) 1999-12-31
DE69801629D1 (en) 2001-10-18
EP0911670B1 (en) 2001-09-12
JPH11194309A (en) 1999-07-21
CN1163780C (en) 2004-08-25
FR2770000A1 (en) 1999-04-23
JP4602493B2 (en) 2010-12-22
CN1215844A (en) 1999-05-05
AU8934598A (en) 1999-05-06
CA2250568C (en) 2007-06-26
EP0911670A1 (en) 1999-04-28
BR9804425B1 (en) 2012-02-07

Similar Documents

Publication Publication Date Title
CA2250568A1 (en) Multifocal ophthalmic lens
CA2250571A1 (en) Multifocal ophthalmic lens
CA2281121A1 (en) Presbyopia correction contact lens
CA2292353A1 (en) Contact lenses with constant peripheral geometry
CA2272940A1 (en) Contact lenses providing improved visual acuity
ES2077528A2 (en) Progressive multifocal ophthalmic lens
EP0742465A3 (en) Combined multifocal toric lens designs
CA2249584A1 (en) Improved single vision lenses
CA2296823A1 (en) Progressive mulitfocal ophthalmic lens
EP0742466A3 (en) Concentric ring single vision lens designs
CA2250615A1 (en) Multifocal ophthalmic lens
DE69602167D1 (en) SYSTEM WITH TWO DIFFERENT SPHERICAL-ASPHERIC CONTACT LENSES FOR CORRECTION OF OLD-VISION
CA2265705A1 (en) Set of progressive multifocal ophthalmic lenses
CA2339776A1 (en) Multifocal aspheric lens
ES2100798A1 (en) Progressive multifocal ophthalmic lens pair
AU6064094A (en) Multifocal contact lens
EP0741313A3 (en) Rotationally stable contact lens designs
AU596438B2 (en) Swim goggles
AU6858300A (en) Bifocal lenses
EP0225098A3 (en) Bifocal lens
IE903919A1 (en) Coloured contact lens having very natural appearance
CA2035102A1 (en) Contact lens for correction of astigmatism
CA2250616A1 (en) Ophthalmic lens
CA2161560A1 (en) Progressive Multifocal Ophthalmic Lens
EP0971255A3 (en) Integral vertical plane adjusting mechanism for an eyeglass frame with multifocal lenses

Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20181015