Patent US4919663A successfully refreshed from Google Patents.
US4919663A
Expired / Lapsed
US
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Laminated zone of focus artificial hydrogel lens
Assignee: Individual
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Filing: 1988-10-17
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Granted: 1990-04-24
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Expires: 2008-10-17
Abstract
Abstract An implantable or contact hydrogel lens for replacement of a defective natural lens in an eye in which various portions of the lens are laminated horizontally to have different powers to produce in-focus images on different portions of the retina of objects which are located at various distances from the eye, thereby substituting for the natural focusing action of the eye. The image processing capability of the brain functions to largely ignore the out-of-focus images and concentrate on the in-focus image of the object selected by the brain for consideration.
Inventors
- 👤 Dennis T. Grendahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:47
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/16; A61F2/1613; A61F2/1616; A61F2/1618; A61F2240/00; A61F2240/001; A61F2250/00; A61F2250/0058; A61F2250/0096; A61F2250/0098
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
104 words
A laminated zone of focus hydrogel lens for use with an eye comprising: a. a first lamination hydrogel element encompassing a first area of said lens; b. a second lamination hydrogel element encompassing a second area of said lens; c. said first lamination element, in combination with said second lamination element serving to create an image of a first distinct portion of the retina; and, d. said second lamination element serving to simultaneously create an image on a second distinct portion of the retina which is, different from said first portion; wherein e. at least two of said laminated elements are of different colors.
Claim 2
Dependent Claim
104 words
A laminated zone of focus hydrogel lens for use with an eye comprising: a. a first lamination hydrogel element encompassing a first area of said lens; b. a second lamination hydrogel element encompassing a second area of said lens; c. said first lamination element, in combination with said second lamination element serving to create an image of a first distinct portion of the retina; and, d. said second lamination element serving to simultaneously create an image on a second distinct portion of the retina which is, different from said first portion; wherein e. at least two of said laminated elements are of different colors.
Claim 3
Dependent Claim
19 words
A lens according to claim 1 where in said first and second lamination elements have differing indices of refraction.
Claim 4
Dependent Claim
24 words
A lens according to claim wherein said first lamination element has a surface curvature differing from the surface curvature of said second lamination element.
Claim 5
Dependent Claim
19 words
A lens according to claim wherein said first lamination element has a diameter less than said second lamination element.
Claim 6
Dependent Claim
42 words
A lens according to claim 4 wherein the surface area of said lens in the region of the periphery of the lamination element having the smaller diameter is coated with an opaque material to reduce reflected and refracted rays from this region.
Claim 7
Dependent Claim
19 words
A lens according to claim 1 wherein said lamination elements are joined with a transparent or non-transparent adhesive material.
Claim 8
Dependent Claim
25 words
A lens according to claim 1 further including a coating over at least one of the surfaces of said lens to provide a smooth surface.
Claim 9
Dependent Claim
15 words
A lens according to claim 7 wherein both surfaces of said lens are so coated.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-23 | 1993-10-23 | 1994-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-23 | 1997-10-23 | 1998-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-23 | 2001-10-23 | 2002-04-24 | $7700.00 | Window Closed / Lapsed |