CA2250615A1 - Multifocal ophthalmic lens - Google Patents

Multifocal ophthalmic lens

Info

Publication number
CA2250615A1
CA2250615A1 CA 2250615 CA2250615A CA2250615A1 CA 2250615 A1 CA2250615 A1 CA 2250615A1 CA 2250615 CA2250615 CA 2250615 CA 2250615 A CA2250615 A CA 2250615A CA 2250615 A1 CA2250615 A1 CA 2250615A1
Authority
CA
Canada
Prior art keywords
lens
vision region
progression
meridian
geometric center
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 2250615
Other languages
French (fr)
Other versions
CA2250615C (en
Inventor
Jean-Pierre Chauveau
Bernard Bourdoncle
Sandrine Francois
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=9512328&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2250615(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 CA2250615A1 publication Critical patent/CA2250615A1/en
Application granted granted Critical
Publication of CA2250615C publication Critical patent/CA2250615C/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
    • G02C7/065—Properties on the principal line
    • 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

A multifocal ophthalmic lens comprising a far vision region, a near vision region an intermediate vision region and a main meridian of progression passing through these three regions is provided in which a principal length of progression, defined as a ratio between power addition and maximum slope of mean sphere along the meridian is less than 16 mm, sphere varies in a monotonous fashion as a function of angle on a 20 mm radius circle centered on a geometric center of the lens at both sides of said meridian, and in which the far vision region delimited in an upper portion of said lens by lines formed of points for which cylinder is equal to half power addition includes an angular sector having its origin at the geometric center of the lens with an included angle greater than 150°. This provides a good distribution of isocylinder and ionosphere lines over the lens, ensuring progression is very gentle. .THETA.
CA 2250615 1997-10-16 1998-10-15 Multifocal ophthalmic lens Expired - Lifetime CA2250615C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9712989A FR2769999B1 (en) 1997-10-16 1997-10-16 MULTIFOCAL OPHTHALMIC LENS
FR9712989 1997-10-16

Publications (2)

Publication Number Publication Date
CA2250615A1 true CA2250615A1 (en) 1999-04-16
CA2250615C CA2250615C (en) 2007-07-24

Family

ID=9512328

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2250615 Expired - Lifetime CA2250615C (en) 1997-10-16 1998-10-15 Multifocal ophthalmic lens

Country Status (10)

Country Link
EP (1) EP0911672B1 (en)
JP (1) JP3609632B2 (en)
CN (1) CN1163779C (en)
AU (1) AU737623B2 (en)
BR (1) BR9804424B1 (en)
CA (1) CA2250615C (en)
DE (1) DE69800622T2 (en)
ES (1) ES2155281T3 (en)
FR (1) FR2769999B1 (en)
PT (1) PT911672E (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
CN1815298B (en) * 1999-12-22 2014-03-12 埃塞罗国际公司 Method for defining pair of multi-focus gradual-variation lens by using optimization process
ATE386284T1 (en) * 2000-04-25 2008-03-15 Rodenstock Gmbh PROGRESSIVE LENS WITH LOW ROCKING EFFECTS
DE10121133B4 (en) * 2001-04-30 2005-04-07 Rodenstock Gmbh Method for producing a spectacle lens taking into account the optimal, individual progression length
DE10133617B4 (en) * 2001-07-13 2008-01-03 Rodenstock Gmbh Progressive lens with real short progression
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
DE10349721A1 (en) 2003-10-23 2005-06-09 Rodenstock Gmbh Individual spectacle lens
FR2871248B1 (en) * 2004-06-03 2006-09-08 Essilor Int OPHTHALMIC 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
CA2773046C (en) * 2006-03-08 2019-02-12 Scientific Optics, Inc. Method and apparatus for universal improvement of vision
FR2924825B1 (en) * 2007-12-11 2010-08-20 Essilor Int PROGRESSIVE OPHTHALMIC LENS.
CN102830503A (en) * 2012-07-26 2012-12-19 苏州苏大明世光学有限公司 Universal progressive multi-focal lens and die
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
CN104755998B (en) 2012-10-26 2017-03-08 埃西勒国际通用光学公司 Method for providing optical glass
CN103246083B (en) * 2013-05-29 2015-05-27 苏州科技学院 Progressive addition ophthalmic lens and preparation method thereof

Family Cites Families (3)

* 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

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
CA2250615C (en) 2007-07-24
JPH11194308A (en) 1999-07-21
ES2155281T3 (en) 2001-05-01
CN1163779C (en) 2004-08-25
FR2769999A1 (en) 1999-04-23
CN1218198A (en) 1999-06-02
AU8934798A (en) 1999-05-06
EP0911672B1 (en) 2001-03-21
FR2769999B1 (en) 1999-12-31
BR9804424A (en) 1999-11-03
DE69800622D1 (en) 2001-04-26
BR9804424B1 (en) 2012-02-07
JP3609632B2 (en) 2005-01-12
PT911672E (en) 2001-06-29
DE69800622T2 (en) 2001-06-28
AU737623B2 (en) 2001-08-23
EP0911672A1 (en) 1999-04-28

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20181015