Patent US5217489A successfully refreshed from Google Patents.
US5217489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bifocal intraocular lens
Assignee: Alcon Research LLC
•
Filing: 1992-03-03
•
Granted: 1993-06-08
•
Expires: 2012-03-03
Abstract
Abstract Intraocular lenses with three zones for the provision of bifocal vision are described. Methods for the lenses use are also described.
Inventors
- 👤 Stephen J. Van Noy
- 👤 Anilbhai S. Patel
- 👤 Thomas Carncross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:44
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/16; A61F2/1613; A61F2/1616; A61F2/1618; A61F2/1637; A61L; A61L27/00; A61L27/14; A61L27/16; A61L2430/00; A61L2430/16
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
137 words
A bifocal intraocular lens having an optic portion with a zone surface and a non-zone surface, the zone surface comprising a central zone comprising means for the provision of distance vision, having a diameter of about 1.5 to 2.0 mm, a second zone comprising means for the provision of near vision, surrounding the central zone, with an inside diameter of about 1.5 to 2.0 mm and an outside diameter of about 2.8 to 3.5 mm, and a third zone comprising means for the provision of distance vision, which extends from the outer diameter of the second zone to the edge of the optic, the radius of curvature of the third zone differing from that of the central zone to correct for spherical aberration such that images formed by the central and third zones are coincident in aqueous.
Claim 2
Dependent Claim
137 words
A bifocal intraocular lens having an optic portion with a zone surface and a non-zone surface, the zone surface comprising a central zone comprising means for the provision of distance vision, having a diameter of about 1.5 to 2.0 mm, a second zone comprising means for the provision of near vision, surrounding the central zone, with an inside diameter of about 1.5 to 2.0 mm and an outside diameter of about 2.8 to 3.5 mm, and a third zone comprising means for the provision of distance vision, which extends from the outer diameter of the second zone to the edge of the optic, the radius of curvature of the third zone differing from that of the central zone to correct for spherical aberration such that images formed by the central and third zones are coincident in aqueous.
Claim 3
Dependent Claim
33 words
The lens of claim 1 wherein the central zone has a diameter of 1.8 mm and the second zone has an inside diameter of 1.8 mm and an outside diameter of 3.0 mm.
Claim 4
Dependent Claim
22 words
The lens of claim 2 wherein the second zone provides for a 2.0-5.0 diopter power increase over the central and third zones.
Claim 5
Dependent Claim
50 words
The lens of claim 2 wherein the optic portion is PMMA and the radius of curvature of the central zone is about 28.5 mm, the radius of curvature of the second zone is about 14.9 mm-20.9 mm, and the radius of curvature of the third zone is about 30.0 mm.
Claim 6
Dependent Claim
18 words
The lens of claim 4 wherein the radius of curvature of the second zone is about 17.4 mm.
Claim 7
Dependent Claim
18 words
The lens of claim 4 wherein the radius of curvature of the second zone is about 15.7 mm.
Claim 8
Dependent Claim
22 words
The lens of claim 1 wherein the second zone provides for a 2.0-5.0 diopter power increase over the central and third zones.
Claim 9
Dependent Claim
12 words
The lens of claim 7 wherein the diopter power increase is 3.5-4.5.
Claim 10
Dependent Claim
39 words
The lens of claim 1 wherein the optic portion is PMMA and the central zone has a diameter of 1.8 mm and the second zone has an inside diameter of 1.8 mm and an outside diameter of 3.0 mm.
Claim 11
Dependent Claim
10 words
The lens of claim 1 wherein the optic is biconvex.
Claim 12
Dependent Claim
21 words
The lens of claim 1 wherein the optic is comprised of a material with a refractive index of 1.40 to 1.60.
Claim 13
Dependent Claim
10 words
The lens of claim 11 wherein the optic comprises PMMA.
Claim 14
Dependent Claim
11 words
The lens of claim 11 herein the optic comprises soft acrylates.
Claim 15
Independent Claim
155 words
A method for providing bifocal vision which comprises, selecting an intraocular lens having an optic portion with a zone surface and a non-zone surface, the zone surface comprising a central zone comprising means for the provision of distance vision, having a diameter of about 1.5 to 2.0 mm, a second zone comprising means for the provision of near vision, surrounding the central zone, with an inside diameter of about 1.5 to 2.0 mm and an outside diameter of about 2.8 to 3.5 mm, and a third zone comprising means for the provision of distance vision, which extends from the outer diameter of the second zone to the edge of the optic, the radius of curvature of the third zone differing from that of the central zone to correct for spherical aberration such that images formed by the central and third zones are coincident in aqueous, and implanting said lens into the eye of a patient.
Claim 16
Independent Claim
155 words
A method for providing bifocal vision which comprises, selecting an intraocular lens having an optic portion with a zone surface and a non-zone surface, the zone surface comprising a central zone comprising means for the provision of distance vision, having a diameter of about 1.5 to 2.0 mm, a second zone comprising means for the provision of near vision, surrounding the central zone, with an inside diameter of about 1.5 to 2.0 mm and an outside diameter of about 2.8 to 3.5 mm, and a third zone comprising means for the provision of distance vision, which extends from the outer diameter of the second zone to the edge of the optic, the radius of curvature of the third zone differing from that of the central zone to correct for spherical aberration such that images formed by the central and third zones are coincident in aqueous, and implanting said lens into the eye of a patient.
Claim 17
Dependent Claim
41 words
The method of claim 14 wherein said selecting step includes selecting a lens wherein the central zone has a diameter of 1.8 mm, and the second zone has an inside diameter of 1.8 mm and an outside diameter of 3.0 mm.
Claim 18
Dependent Claim
52 words
The method of claim 15 wherein said selecting step includes selecting a lens wherein the radius of curvature of the central zone is about 28.5 mm, the radius of curvature of the second zones is about 14.9 mm-20.9 mm, and the radius of curvature of the third zone is about 30.0 mm.
Claim 19
Dependent Claim
26 words
The method of claim 16 wherein said selecting step includes selecting a lens wherein the radius of curvature of the second zone is about 17.4 mm.
Claim 20
Dependent Claim
29 words
The method of claim 14 wherein said selecting step includes selecting a lens wherein the second zone has a 2.0-5.0 diopter power increase over the central and third zones.
Claim 21
Dependent Claim
20 words
The method of claim 18 wherein said selecting step includes selecting a lens wherein the diopter power increase is 3.5-4.5.
Claim 22
Dependent Claim
58 words
The method of claim 14 wherein said selecting step includes selecting a lens wherein the optic portion is PMMA and the radius of curvature of the central zone is about 28.5 mm, the radius of curvature of the second zone is about 14.9 mm-20.9 mm, and the radius of curvature of the third zone is about 30.0 mm.
Claim 23
Dependent Claim
26 words
The method of claim 20 wherein said selecting step includes selecting a lens wherein the radius of curvature of the second zone is about 17.4 mm.
Claim 24
Dependent Claim
18 words
The method of claim 14 wherein said selecting step includes selecting a lens wherein the lens is biconvex.
Claim 25
Dependent Claim
27 words
The method of claim 14 wherein said selecting step includes selecting a lens wherein the optic is comprised of a material with a refractive index of 1.40-1.60.
Claim 26
Dependent Claim
22 words
The method of claim 14 wherein said selecting step includes selecting a lens wherein the lens is comprised of a soft acrylate.
Claim 27
Dependent Claim
57 words
An intraocular lens having an optic portion with a zone surface and a non-zone surface, the zone surface comprising a central zone with a radius of curvature of about 28.5 mm, a second zone having a radius of curvature of about 14.9 mm-20.9 mm, and a third zone having a radius of curvature of about 30.0 mm.
Claim 28
Dependent Claim
57 words
An intraocular lens having an optic portion with a zone surface and a non-zone surface, the zone surface comprising a central zone with a radius of curvature of about 28.5 mm, a second zone having a radius of curvature of about 14.9 mm-20.9 mm, and a third zone having a radius of curvature of about 30.0 mm.
Claim 29
Dependent Claim
10 words
The lens of claim 25 having a biconvex optic portion.
Claim 30
Dependent Claim
11 words
The lens of claim 25 wherein the optic portion is PMMA.
Claim 31
Dependent Claim
138 words
A soft acrylate intraocular lens having an optic portion with a zone surface and a non-zone surface, the zone surface comprising a central zone comprising means for the provision of distance vision, having a diameter of about 1.5 to 2.0 mm, a second zone comprising means for the provision of near vision, surrounding the central zone, with an inside diameter of about 1.5 to 2.0 mm and an outside diameter of about 2.8 to 3.5 mm, and a third zone comprising means for the provision of distance vision, which extends from the outer diameter of the second zone to the edge of the optic, the radius of curvature of the third zone differing from that of the central zone to correct for spherical aberration such that images formed by the central and third zones are coincident in aqueous.
Claim 32
Dependent Claim
138 words
A soft acrylate intraocular lens having an optic portion with a zone surface and a non-zone surface, the zone surface comprising a central zone comprising means for the provision of distance vision, having a diameter of about 1.5 to 2.0 mm, a second zone comprising means for the provision of near vision, surrounding the central zone, with an inside diameter of about 1.5 to 2.0 mm and an outside diameter of about 2.8 to 3.5 mm, and a third zone comprising means for the provision of distance vision, which extends from the outer diameter of the second zone to the edge of the optic, the radius of curvature of the third zone differing from that of the central zone to correct for spherical aberration such that images formed by the central and third zones are coincident in aqueous.
Claim 33
Dependent Claim
33 words
The lens of claim 28 wherein the central zone has a diameter of 1.8 mm and the second zone has an inside diameter of 1.8 mm and an outside diameter of 3.0 mm.
Claim 34
Dependent Claim
30 words
The bifocal lens of claim 28 wherein the optic portion comprises about 65 wt. % PEA, 30 wt. % PEMA, 3.2 wt. % BDDA, and 1.8 wt. % 2-(3'methallyl-2'hydroxy-5'-methyl phenyl)benzotriazole.
References Cited (Backward Citations)
US4890913A
Cited
US4813955A
Cited
US4636211A
Cited
US4795462A
Cited
WO1989002251A1
Cited
US5089024A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-07 | 1996-12-07 | 1997-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-07 | 2000-12-07 | 2001-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-07 | 2004-12-07 | 2005-06-08 | $7700.00 | Window Closed / Lapsed |