GB1536891A - Ophthalmic lens for presbyopia and aphakia - Google Patents
Ophthalmic lens for presbyopia and aphakiaInfo
- Publication number
- GB1536891A GB1536891A GB548676A GB548676A GB1536891A GB 1536891 A GB1536891 A GB 1536891A GB 548676 A GB548676 A GB 548676A GB 548676 A GB548676 A GB 548676A GB 1536891 A GB1536891 A GB 1536891A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- accommodation
- presbyopia
- vision
- closer
- 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
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
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
1536891 Opthalmic lens D VOLK 12 Feb 1976 05486/76 Heading G2J A spectacle or contact type lens is semi-finished in such a way that failing or absence of accommodation in presbyopia and the lack of accommodation in aphakin is accomplished in a continuous and regular manner, without discontinuities in the field of vision through the lens, and with minimal distortion in the field. The design of the lens is such that, in gazing at distant objects through the upper portion of the lens as it is worn, vision is clear and as objects are observed through lower and lower portions of the lens they must be closer and closer to the wearer to be seen clearly. Such continuous and regular increase in refractive power from the upper distance portion to the lower border results from the combination of a back surface which is either conicoid with an eccentricity of greater than or equal to zero or toric (a toric back surface being used when ocular astigmation is to be corrected) and a front surface which increases in curvature continuously and regularly in an accelerated manner from said upper portion to provide an increasing refractive power for the correction of the accommodative insufficiency or absence of accommodation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB548676A GB1536891A (en) | 1976-02-12 | 1976-02-12 | Ophthalmic lens for presbyopia and aphakia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB548676A GB1536891A (en) | 1976-02-12 | 1976-02-12 | Ophthalmic lens for presbyopia and aphakia |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1536891A true GB1536891A (en) | 1978-12-29 |
Family
ID=9797115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB548676A Expired GB1536891A (en) | 1976-02-12 | 1976-02-12 | Ophthalmic lens for presbyopia and aphakia |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1536891A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2192291A (en) * | 1986-03-04 | 1988-01-06 | Anil K Gupta | Progressive power contact lens |
| EP0461624A1 (en) * | 1990-06-13 | 1991-12-18 | Seiko Epson Corporation | Spectacle lens |
| EP1411382A2 (en) * | 1999-07-02 | 2004-04-21 | E-Vision, L.L.C. | System, apparatus, and method for correcting vision using an electro-active lens |
| US7731358B2 (en) | 1999-07-02 | 2010-06-08 | E-Vision Llc | System, apparatus, and method for correcting vision using an electro-active lens |
| US7775660B2 (en) | 1999-07-02 | 2010-08-17 | E-Vision Llc | Electro-active ophthalmic lens having an optical power blending region |
-
1976
- 1976-02-12 GB GB548676A patent/GB1536891A/en not_active Expired
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2192291A (en) * | 1986-03-04 | 1988-01-06 | Anil K Gupta | Progressive power contact lens |
| GB2192291B (en) * | 1986-03-04 | 1990-08-22 | Gupta Anil K | Progressive power contact lens. |
| EP0461624A1 (en) * | 1990-06-13 | 1991-12-18 | Seiko Epson Corporation | Spectacle lens |
| US5270746A (en) * | 1990-06-13 | 1993-12-14 | Seiko Epson Corporation | Eyeglass lens |
| EP1411382A2 (en) * | 1999-07-02 | 2004-04-21 | E-Vision, L.L.C. | System, apparatus, and method for correcting vision using an electro-active lens |
| EP1411382A3 (en) * | 1999-07-02 | 2007-01-17 | E-Vision, L.L.C. | System, apparatus, and method for correcting vision using an electro-active lens |
| US7731358B2 (en) | 1999-07-02 | 2010-06-08 | E-Vision Llc | System, apparatus, and method for correcting vision using an electro-active lens |
| US7775660B2 (en) | 1999-07-02 | 2010-08-17 | E-Vision Llc | Electro-active ophthalmic lens having an optical power blending region |
| US8029134B2 (en) | 1999-07-02 | 2011-10-04 | E-Vision, Llc | System, apparatus, and method for correcting vision using an electro-active lens |
| US8047651B2 (en) | 1999-07-02 | 2011-11-01 | E-Vision Inc. | Electro-active opthalmic lens having an optical power blending region |
| US8333470B2 (en) | 1999-07-02 | 2012-12-18 | E-Vision Llc | Electro-active opthalmic lens having an optical power blending region |
| US8727531B2 (en) | 1999-07-02 | 2014-05-20 | E-Vision, Llc | Electro-active opthalmic lens having an optical power blending region |
| US9323101B2 (en) | 1999-07-02 | 2016-04-26 | E-Vision Smart Optics, Inc. | Electro-active opthalmic lens having an optical power blending region |
| US9411173B1 (en) | 1999-07-02 | 2016-08-09 | E-Vision Smart Optics, Inc. | Electro-active opthalmic lens having an optical power blending region |
| US9500883B2 (en) | 1999-07-02 | 2016-11-22 | E-Vision Smart Optics, Inc. | Electro-active opthalmic lens having an optical power blending region |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |