Patent US5236452A successfully refreshed from Google Patents.
US5236452A
Expired / Lapsed
US
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Intraocular multifocal lens
Assignee: Johnson and Johnson Surgical Vision Inc
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Filing: 1991-11-21
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Granted: 1993-08-17
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Expires: 2011-11-21
Abstract
Abstract An intraocular lens, in the form of a disk, intended to replace the crystalline lens of a patient's eye, in particular after a cataract extraction, comprises on its distal side an aspherical sector extending approximately from the midline of the disk over one quarter of the surface thereof. The rest of the distal side is spherical. The radius of curvature of the aspherical sector varies monotonously between the value of the radius of the spherical sectors and a lower value. Such a configuration allows light rays impinging on the intraocular lens to be refracted at different angles and provides both near the distance vision. The discontinuity at transition between the aspherical sector and the spherical sector is blocked out by dark or etched plastic to eliminate glare. The proximal side can either be a convex surface, a concave surface or a plane.
Inventors
- 👤 Lee T. Nordan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:50
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/16; A61F2/1613; A61F2/1616; A61F2/1618; A61F2/1637; A61F2/164
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
56 words
An intraocular implant to replace the crystalline lens of a patient's eye, comprising: an aspheric lens formed of soft, bio-compatible material, wherein said material is silicone; a surface of said lens which has circumferentially non-uniform dioptic power; and, a surface having both an aspheric sector and a spherical sector starting at an apex of said lens.
Claim 2
Dependent Claim
56 words
An intraocular implant to replace the crystalline lens of a patient's eye, comprising: an aspheric lens formed of soft, bio-compatible material, wherein said material is silicone; a surface of said lens which has circumferentially non-uniform dioptic power; and, a surface having both an aspheric sector and a spherical sector starting at an apex of said lens.
Claim 3
Dependent Claim
47 words
An intraocular implant to replace the crystalline lens of a patient's eye, comprising: an aspheric lens formed of soft, bio-compatible material, wherein said material is silicone; and a first convex surface and a second convex surface, said first and second convex surface forming an obtuse angle therebetween.
Claim 4
Dependent Claim
47 words
An intraocular implant to replace the crystalline lens of a patient's eye, comprising: an aspheric lens formed of soft, bio-compatible material, wherein said material is silicone; and a first convex surface and a second convex surface, said first and second convex surface forming an obtuse angle therebetween.
Claim 5
Dependent Claim
24 words
The intraocular implant of claim 2, wherein said first convex surface is a spherical sector and said second convex surface is an aspheric sector.
Claim 6
Dependent Claim
22 words
An aspheric silicone lens, comprising: a spheric portion and an aspheric portion wherein said spheric portion is larger than said aspheric portion.
Claim 7
Dependent Claim
22 words
An aspheric silicone lens, comprising: a spheric portion and an aspheric portion wherein said spheric portion is larger than said aspheric portion.
Claim 8
Dependent Claim
46 words
A soft intraocular lens which has at least one surface which is not uniformly spherical, said non-uniformly spherical surface comprising at least two sections having surfaces which intersect to form an obtuse angle therebetween, wherein said non-uniformly spherical surface comprises at least two adjacent spherical sectors.
Claim 9
Dependent Claim
46 words
A soft intraocular lens which has at least one surface which is not uniformly spherical, said non-uniformly spherical surface comprising at least two sections having surfaces which intersect to form an obtuse angle therebetween, wherein said non-uniformly spherical surface comprises at least two adjacent spherical sectors.
Claim 10
Dependent Claim
51 words
A soft intraocular lens which has at least one surface which is not uniformly spherical, said non-uniformly spherical surface comprising at least two sections having surfaces which intersect to form an obtuse angle therebetween, wherein said non-uniformly spherical surface comprises at least two adjacent spherical sectors having unequal radii of curvature.
Claim 11
Dependent Claim
51 words
A soft intraocular lens which has at least one surface which is not uniformly spherical, said non-uniformly spherical surface comprising at least two sections having surfaces which intersect to form an obtuse angle therebetween, wherein said non-uniformly spherical surface comprises at least two adjacent spherical sectors having unequal radii of curvature.
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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) | 1996-08-16 | 1997-02-15 | 1997-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-16 | 2001-02-15 | 2001-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-16 | 2005-02-15 | 2005-08-17 | $7700.00 | Window Closed / Lapsed |