US4906245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple element zone of focus artificial hydrogel lens
Assignee: Individual
•
Filing: 1988-10-17
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Granted: 1990-03-06
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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 have different powers and focal lengths to produce in-focus images on 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
2026-10-30 04:56
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/16; A61F2/1613; A61F2/1616; A61F2/1618; A61F2/1648
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
102 words
A zone of focus hydrogel lens for use with an eye comprising: a. a plurality of hydrogel lens elements joined to form a unitary lens structure having a front surface, a rear surface and a circular periphery; b. each of said hydrogel lens elements serving to create an image on a distinct portion of the retina; and, c. at least two of said hydrogel lens elements having different powers whereby objects at different distances from the eye are simultaneously brought to a focus on distinct portions of the retina; and, d. at least two of said lens elements are of different colors.
Claim 2
Dependent Claim
102 words
A zone of focus hydrogel lens for use with an eye comprising: a. a plurality of hydrogel lens elements joined to form a unitary lens structure having a front surface, a rear surface and a circular periphery; b. each of said hydrogel lens elements serving to create an image on a distinct portion of the retina; and, c. at least two of said hydrogel lens elements having different powers whereby objects at different distances from the eye are simultaneously brought to a focus on distinct portions of the retina; and, d. at least two of said lens elements are of different colors.
Claim 3
Dependent Claim
12 words
A lens according to claim 1 wherein said lens elements are round.
Claim 4
Dependent Claim
23 words
A lens according to claim 2 wherein at least two of said lens elements are of hydrogel materials having different indices of refraction.
Claim 5
Dependent Claim
16 words
A lens according to claim 1 comprised of lens elements each having different indices of refraction.
Claim 6
Dependent Claim
11 words
A lens according to claim 4 consisting of three lens elements.
Claim 7
Dependent Claim
18 words
A lens according to claim 5 having a horizontally oriented lens element larger than said other lens elements.
Claim 8
Dependent Claim
18 words
A lens according to claim 5 having a vertically oriented lens element larger than said other lens elements.
Claim 9
Dependent Claim
13 words
A lens according to claim 5 wherein said lens elements are horizontally oriented.
Claim 10
Dependent Claim
13 words
A lens according to claim 5 wherein said lens elements are vertically oriented.
Claim 11
Dependent Claim
16 words
A lens according to claim 3 wherein the junctions between lens elements includes an anti-reflective coating.
Claim 12
Dependent Claim
22 words
First and second lenses according to claim 1 for use in left and right eyes wherein like power elements ar similarly positioned.
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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) | 1993-03-05 | 1993-09-04 | 1994-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-05 | 1997-09-04 | 1998-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-05 | 2001-09-04 | 2002-03-06 | $7700.00 | Window Closed / Lapsed |