FR2281584A1 - Soft contact lens for astigmatism correction - has toroidal surfaces, and is stabilised by single or double truncation - Google Patents

Soft contact lens for astigmatism correction - has toroidal surfaces, and is stabilised by single or double truncation

Info

Publication number
FR2281584A1
FR2281584A1 FR7427640A FR7427640A FR2281584A1 FR 2281584 A1 FR2281584 A1 FR 2281584A1 FR 7427640 A FR7427640 A FR 7427640A FR 7427640 A FR7427640 A FR 7427640A FR 2281584 A1 FR2281584 A1 FR 2281584A1
Authority
FR
France
Prior art keywords
toroidal
stabilised
contact lens
soft contact
astigmatism correction
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
FR7427640A
Other languages
French (fr)
Other versions
FR2281584B1 (en
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
Priority to FR7427640A priority Critical patent/FR2281584A1/en
Publication of FR2281584A1 publication Critical patent/FR2281584A1/en
Application granted granted Critical
Publication of FR2281584B1 publication Critical patent/FR2281584B1/fr
Granted legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
    • A61B3/028—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuity; for determination of refraction, e.g. phoropters
    • A61B3/04—Trial frames; Sets of lenses for use therewith
    • 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
    • G02C7/04—Contact lenses for the eyes
    • G02C7/041—Contact lenses for the eyes bifocal; multifocal
    • 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
    • G02C7/04—Contact lenses for the eyes
    • G02C7/048—Means for stabilising the orientation of lenses in the eye

Abstract

The lens may be stabilised by a single or double truncation, a ballast prism (prism with internal base) or a ballast prism in conjunction with a single or double truncation. The rear surface may be toroidal while the front surface is spherical, or vice versa, or both surfaces may be toroidal. The front surface may be bifocal while the rear surface is toroidal or the front surface may be spherical while the toroidal rear surface is bifocal. The toroidal surface of the corner is matched to the lens in order to correct astigmatism.
FR7427640A 1974-08-08 1974-08-08 Soft contact lens for astigmatism correction - has toroidal surfaces, and is stabilised by single or double truncation Granted FR2281584A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7427640A FR2281584A1 (en) 1974-08-08 1974-08-08 Soft contact lens for astigmatism correction - has toroidal surfaces, and is stabilised by single or double truncation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7427640A FR2281584A1 (en) 1974-08-08 1974-08-08 Soft contact lens for astigmatism correction - has toroidal surfaces, and is stabilised by single or double truncation

Publications (2)

Publication Number Publication Date
FR2281584A1 true FR2281584A1 (en) 1976-03-05
FR2281584B1 FR2281584B1 (en) 1980-04-04

Family

ID=9142262

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7427640A Granted FR2281584A1 (en) 1974-08-08 1974-08-08 Soft contact lens for astigmatism correction - has toroidal surfaces, and is stabilised by single or double truncation

Country Status (1)

Country Link
FR (1) FR2281584A1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2425088A1 (en) * 1978-05-04 1979-11-30 Spofa Vereinigte Pharma Werke HYDROGEL-FORMED TORIC CONTACT LENS
EP0008726A1 (en) * 1978-09-04 1980-03-19 Hirst Contact Lens Limited Contact lenses and methods of making the same
FR2536983A1 (en) * 1982-12-03 1984-06-08 Mo I Glaznykh Bole Process for selecting contact lenses for correcting vision
US4874234A (en) * 1984-06-18 1989-10-17 Ceskoslovenska Akademie Ved Toric contact lens with displaced center of gravity
FR2700024A1 (en) * 1992-12-28 1994-07-01 Rothschild Fondation Ophtalmo Gas-permeable rigid contact lens for irregularly deformed cornea
EP0732608A1 (en) * 1995-03-15 1996-09-18 Ciba-Geigy Ag Rotationally stabilized contact lens and methods of lens stabilization
WO1998045749A1 (en) * 1997-04-07 1998-10-15 Bausch & Lomb Incorporated Toric contact lenses
US6471891B1 (en) 1997-09-24 2002-10-29 Novartis Ag Method for automatic manufacture of and printing on astigmatic contact lenses and apparatus therefor
US7621635B2 (en) 2005-12-22 2009-11-24 Bausch & Lamb Incorporated Toric contact lenses
US8684521B2 (en) 2005-12-22 2014-04-01 Bausch & Lomb Incorporated Toric contact lenses

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2425088A1 (en) * 1978-05-04 1979-11-30 Spofa Vereinigte Pharma Werke HYDROGEL-FORMED TORIC CONTACT LENS
EP0008726A1 (en) * 1978-09-04 1980-03-19 Hirst Contact Lens Limited Contact lenses and methods of making the same
US4318595A (en) * 1978-09-04 1982-03-09 Hirst Contact Lens Limited Contact lens and method of making the same
FR2536983A1 (en) * 1982-12-03 1984-06-08 Mo I Glaznykh Bole Process for selecting contact lenses for correcting vision
US4874234A (en) * 1984-06-18 1989-10-17 Ceskoslovenska Akademie Ved Toric contact lens with displaced center of gravity
FR2700024A1 (en) * 1992-12-28 1994-07-01 Rothschild Fondation Ophtalmo Gas-permeable rigid contact lens for irregularly deformed cornea
EP0732608A1 (en) * 1995-03-15 1996-09-18 Ciba-Geigy Ag Rotationally stabilized contact lens and methods of lens stabilization
WO1998045749A1 (en) * 1997-04-07 1998-10-15 Bausch & Lomb Incorporated Toric contact lenses
US6113236A (en) * 1997-04-07 2000-09-05 Bausch & Lomb Incorporated Toric contact lenses
AU726810B2 (en) * 1997-04-07 2000-11-23 Bausch & Lomb Incorporated Toric contact lenses
US6471891B1 (en) 1997-09-24 2002-10-29 Novartis Ag Method for automatic manufacture of and printing on astigmatic contact lenses and apparatus therefor
US7621635B2 (en) 2005-12-22 2009-11-24 Bausch & Lamb Incorporated Toric contact lenses
US8684521B2 (en) 2005-12-22 2014-04-01 Bausch & Lomb Incorporated Toric contact lenses

Also Published As

Publication number Publication date
FR2281584B1 (en) 1980-04-04

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Legal Events

Date Code Title Description
ST Notification of lapse