Patent US4495665A successfully refreshed from Google Patents.
US4495665A
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US
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Posterior chamber intraocular lens and method of making an opening in a capsule
Assignee: Individual
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Filing: 1983-01-04
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Granted: 1985-01-29
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Expires: 2003-01-04
Abstract
Abstract A posterior chamber intraocular lens having at least two projections on the rear surface thereof for causing a line of tension in the posterior capsule. If desired, after implantation of the lens the posterior capsule may be perforated with a laser beam transversely to the line of tension, causing the posterior capsule to tear and form an opening to eliminate any cloudiness of the posterior capsule from behind the central region of the lens.
Inventors
- 👤 Charles D. Kelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:17
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/16; A61F2/1602; A61F2/161
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
136 words
A posterior chamber intraocular lens comprising: a lens body including a rear surface having thereon at least two projections together having a total length along said rear surface in a direction transverse to the distance between said projections which is small relative to said distance between said projections; and position-fixation means extending from said lens body for positioning said lens body in the capsule of an eye and for pressing said projections against the posterior capsule, each of said projections shaped so as to make substantially single point contact with said posterior capsule and said projections being effective to cause tension of the posterior capsule in said region between at least two of said projections sufficient to tear the posterior capsule after perforation of the capsule in said region between at least two of said projections.
Claim 2
Dependent Claim
136 words
A posterior chamber intraocular lens comprising: a lens body including a rear surface having thereon at least two projections together having a total length along said rear surface in a direction transverse to the distance between said projections which is small relative to said distance between said projections; and position-fixation means extending from said lens body for positioning said lens body in the capsule of an eye and for pressing said projections against the posterior capsule, each of said projections shaped so as to make substantially single point contact with said posterior capsule and said projections being effective to cause tension of the posterior capsule in said region between at least two of said projections sufficient to tear the posterior capsule after perforation of the capsule in said region between at least two of said projections.
Claim 3
Dependent Claim
59 words
A lens in accordance with claim 1 which has an optical axis, said lens body having a substantially circular periphery and said projections being on the periphery of the middle portion of the rear surface of said lens body defined by a radius from said optical axis equal to about one sixth of the diameter of said lens body.
Claim 4
Dependent Claim
43 words
A lens in accordance with claim 1 in which said distance between said projections is at least twice as long as the total length of said projections in a direction transverse to the line along which the distance between said projections is measured.
Claim 5
Dependent Claim
41 words
A lens in accordance with claim 1 in which said projections individually are projections substantially at individual points of said rear surface of said lens body, each having a maximum dimension along said rear surface not greater than about 1 millimeter.
Claim 6
Dependent Claim
39 words
A lens in accordance with claim 1 in which the length of each of said projections in a direction extending from said rear surface of said lens body is in the range of from 0.25 millimeter to 1 millimeter.
Claim 7
Dependent Claim
38 words
A lens in accordance with claim 1 which has an optical axis and which includes three of said projections positioned substantially at the vertices of an imaginary equilateral triangle and at substantially equal distances from said optical axis.
Claim 8
Dependent Claim
28 words
A lens in accordance with claim 1 which has an optical axis and which includes two of said projections spaced at substantially equal distances from said optical axis.
Claim 9
Dependent Claim
24 words
A lens in accordance with claim 1 which includes two of said projections spaced from each other by a distance of approximately 2 millimeters.
Claim 10
Independent Claim
149 words
A method of making an opening in the posterior capsule of an eye comprising: inserting into the capsule of an eye an intraocular lens having spaced projecting portions on the rear surface of the lens body, said projecting portions together having a total length along said rear surface in a direction transverse to the distance between said projecting portions which is small relative to the distance between said projecting portions, each of said projecting portions shaped so as to make substantially single point contact with said posterior capsule thereby causing said projecting portions to press against the posterior capsule for forming at least one line of tension in the posterior capsule in the region between said projecting portions; and perforating the posterior capsule with a laser beam in a direction transverse to the line of tension of the posterior capsule, whereby the posterior capsule tears to form an opening.
Claim 11
Independent Claim
149 words
A method of making an opening in the posterior capsule of an eye comprising: inserting into the capsule of an eye an intraocular lens having spaced projecting portions on the rear surface of the lens body, said projecting portions together having a total length along said rear surface in a direction transverse to the distance between said projecting portions which is small relative to the distance between said projecting portions, each of said projecting portions shaped so as to make substantially single point contact with said posterior capsule thereby causing said projecting portions to press against the posterior capsule for forming at least one line of tension in the posterior capsule in the region between said projecting portions; and perforating the posterior capsule with a laser beam in a direction transverse to the line of tension of the posterior capsule, whereby the posterior capsule tears to form an opening.
Claim 12
Dependent Claim
28 words
A method in accordance with claim 9 in which the step of perforating the posterior capsule with a laser beam includes making perforations crossing the line of tension.
References Cited (Backward Citations)
US4244060A
Cited
US4412359A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-29 | 1988-07-30 | 1989-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-29 | 1992-07-30 | 1993-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-29 | 1996-07-30 | 1997-01-29 | $7700.00 | Window Closed / Lapsed |