US4636211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bifocal intra-ocular lens
Assignee: University Optical Products Co
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Filing: 1984-03-13
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Granted: 1987-01-13
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Expires: 2004-03-13
Abstract
Abstract An intra-ocular lens consisting of a transparent body has concentrically oriented near vision and far vision, optically powered portions with the near vision portion being centrally positioned relative to the body and the far vision portion being coaxial with and surrounding the near vision portion, the lens being fixed in a position such that the near vision portion is aligned with the pupillary aperture of the eye and is fixed in alignment.
Inventors
- 👤 J. McHenry Nielsen
- 👤 Wayne G. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:25
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/16; A61F2/1613; A61F2/1616; A61F2/1618; G; G02; G02C; G02C7/00; G02C7/02; G02C7/04; G02C7/041
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
An intra-ocular lens adapted to be implanted in a human eye comprising a transparent single one-piece lens body, the transparent body having a permanently fixed centrally located, near vision optically powered first portion and a concentrically located, far vision optically powered second portion, the first portion having an average diameter of approximately 2.12 mm and the body having an average diameter of approximately 6 mm, the first portion being optically powered within the range of from +10.00 to +30.00 diopters effective power and the second portion being optically powered within the range of from +10.00 to +30.00 diopters effective power, the difference in effective power between the first and second portions averaging +2.50 diopters effective power in order to ensure distinction in focus and to provide rapid neuro-transfer between near and far vision.
Claim 2
Dependent Claim
133 words
An intra-ocular lens adapted to be implanted in a human eye comprising a transparent single one-piece lens body, the transparent body having a permanently fixed centrally located, near vision optically powered first portion and a concentrically located, far vision optically powered second portion, the first portion having an average diameter of approximately 2.12 mm and the body having an average diameter of approximately 6 mm, the first portion being optically powered within the range of from +10.00 to +30.00 diopters effective power and the second portion being optically powered within the range of from +10.00 to +30.00 diopters effective power, the difference in effective power between the first and second portions averaging +2.50 diopters effective power in order to ensure distinction in focus and to provide rapid neuro-transfer between near and far vision.
References Cited (Backward Citations)
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Cited
US3726587A
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US4206518A
Cited
US4316293A
Cited
US4402579A
Cited
US4435856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-12 | 1990-07-14 | 1991-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-12 | 1994-07-14 | 1995-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-12 | 1998-07-14 | 1999-01-13 | $7700.00 | Window Closed / Lapsed |