GB2364136B - Multifocal contact lenses - Google Patents

Multifocal contact lenses

Info

Publication number
GB2364136B
GB2364136B GB0115084A GB0115084A GB2364136B GB 2364136 B GB2364136 B GB 2364136B GB 0115084 A GB0115084 A GB 0115084A GB 0115084 A GB0115084 A GB 0115084A GB 2364136 B GB2364136 B GB 2364136B
Authority
GB
United Kingdom
Prior art keywords
zones
lens
multifocal contact
focal characteristics
adjacent
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.)
Expired - Fee Related
Application number
GB0115084A
Other versions
GB2364136A (en
GB0115084D0 (en
Inventor
Brian David Cantor
Original Assignee
Brian David Cantor
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
Priority to GB0016000A priority Critical patent/GB0016000D0/en
Application filed by Brian David Cantor filed Critical Brian David Cantor
Priority to GB0115084A priority patent/GB2364136B/en
Publication of GB0115084D0 publication Critical patent/GB0115084D0/en
Publication of GB2364136A publication Critical patent/GB2364136A/en
Application granted granted Critical
Publication of GB2364136B publication Critical patent/GB2364136B/en
Application status is Expired - Fee Related legal-status Critical
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02CSPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00Optical parts
    • G02C7/02Lenses; Lens systems ; Methods of designing lenses
    • G02C7/04Contact lenses for the eyes
    • G02C7/041Contact lenses for the eyes bifocal; multifocal
    • G02C7/042Simultaneous type
    • GPHYSICS
    • G02OPTICS
    • G02CSPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00Optical parts
    • G02C7/02Lenses; Lens systems ; Methods of designing lenses
    • G02C7/04Contact lenses for the eyes
    • G02C7/041Contact lenses for the eyes bifocal; multifocal
    • G02C7/045Sectorial configuration

Abstract

A multifocal contact lens (1) provides zones each of differing focal characteristics, each zone (N) and (F) extending radially. The zones (N) and (F) comprise segments radially extending from a common centre (C) with adjacent segments defining different radial curvatures of the surface of the lens and hence producing different focal characteristics. The lens therefore has the ability to provide simultaneous near (N) and distance (F) viewing to a wearer by projecting two images, which blend into each other, onto the retina. The zones as seen in side profile may have a sinuous form with the adjacent zones smoothly blending into one another (see Fig 2).
GB0115084A 2000-05-12 2001-06-20 Multifocal contact lenses Expired - Fee Related GB2364136B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0016000A GB0016000D0 (en) 2000-05-12 2000-06-29 Multifocal contact lenses
GB0115084A GB2364136B (en) 2000-06-29 2001-06-20 Multifocal contact lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0115084A GB2364136B (en) 2000-06-29 2001-06-20 Multifocal contact lenses

Publications (3)

Publication Number Publication Date
GB0115084D0 GB0115084D0 (en) 2001-08-15
GB2364136A GB2364136A (en) 2002-01-16
GB2364136B true GB2364136B (en) 2004-11-17

Family

ID=26244565

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0115084A Expired - Fee Related GB2364136B (en) 2000-05-12 2001-06-20 Multifocal contact lenses

Country Status (1)

Country Link
GB (1) GB2364136B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7044597B2 (en) 2003-12-16 2006-05-16 Bausch & Lomb Incorporated Multifocal contact lens and method of manufacture thereof
US7625598B2 (en) * 2006-12-15 2009-12-01 Bausch & Lomb Incorporated Silicone contact lenses with wrinkled surface
TWM484119U (en) * 2014-04-30 2014-08-11 Pegavision Corp Progressive multifocal ophthalmic lens

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1367846A (en) * 1971-06-11 1974-09-25 Du Pont Low refractive index contact lenses
GB2129155A (en) * 1982-10-13 1984-05-10 Ng Trustees & Nominees Ltd Bifocal contact lenses
US4798609A (en) * 1987-08-24 1989-01-17 Grendahl Dennis T Radially segmented zone of focus artificial lens
WO1992006400A1 (en) * 1990-10-02 1992-04-16 Volk Donald A Aspheric ophthalmic accommodating lens design for intraocular lens and contact lens
EP0522852A1 (en) * 1991-07-10 1993-01-13 JOHNSON & JOHNSON VISION PRODUCTS, INC. Segmented multifocal contact lens and method of manufacture
EP0553959A1 (en) * 1992-01-28 1993-08-04 JOHNSON & JOHNSON VISION PRODUCTS, INC. Clear axis, segmented multifocal ophthalmic lens
US5969790A (en) * 1996-12-20 1999-10-19 Onufryk; Michael Multi prism image enhancing lens system and method of making same

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1367846A (en) * 1971-06-11 1974-09-25 Du Pont Low refractive index contact lenses
GB2129155A (en) * 1982-10-13 1984-05-10 Ng Trustees & Nominees Ltd Bifocal contact lenses
US4798609A (en) * 1987-08-24 1989-01-17 Grendahl Dennis T Radially segmented zone of focus artificial lens
WO1992006400A1 (en) * 1990-10-02 1992-04-16 Volk Donald A Aspheric ophthalmic accommodating lens design for intraocular lens and contact lens
EP0522852A1 (en) * 1991-07-10 1993-01-13 JOHNSON & JOHNSON VISION PRODUCTS, INC. Segmented multifocal contact lens and method of manufacture
EP0553959A1 (en) * 1992-01-28 1993-08-04 JOHNSON & JOHNSON VISION PRODUCTS, INC. Clear axis, segmented multifocal ophthalmic lens
US5969790A (en) * 1996-12-20 1999-10-19 Onufryk; Michael Multi prism image enhancing lens system and method of making same

Also Published As

Publication number Publication date
GB2364136A (en) 2002-01-16
GB0115084D0 (en) 2001-08-15

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20050620