US4976719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device used to change corneal curvature
Assignee: Individual
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Filing: 1988-11-21
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Granted: 1990-12-11
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Expires: 2008-11-21
Abstract
Abstract This invention relates to a method for reducing all of the common refractive errors, myopia, hyperopia, and astigmatism in a reversible fashion and to a device for achieving same. More particularly, this invention relates to a method for reducing or eliminating nearsightedness by flattening the curvature of the cornea and to a method for reducing or eliminating corneal astigmatism by changing the out-of-round shape of the cornea to a round shape. All of the methods utilize a retainer ring permanently placed in the stroma of the cornea, the tensioning of the ring being controlled by a turnbuckle arrangement.
Inventors
- 👤 Steven B. Siepser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:36
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61F9/013; A61F2/00; A61F2/02; A61F2/14; A61F2/147; Y; Y10; Y10T; Y10T24/00; Y10T24/14; Y10T24/1412; Y10T24/1433; Y10T24/1435; Y10T24/1437
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
118 words
A device for changing the corneal curvature of nearsighted or farsighted persons comprising a length of surgical wire of small cross section for insertion into the stroma of the cornea of a human eye in a ring-like or circular channel in the stroma and adjustable means connecting opposite ends of said wire creating a ring of forces selectively adjustable to thereby permit selective change of the curvature of the cornea, said wire and said adjustable means generally lying on the annulus of the wire and adapted to be completely embedded in the cornea, the ends of said wire being threaded and the adjustable means comprising a turnbuckle having internal threads cooperatively associated with the ends of the wire.
Claim 2
Independent Claim
118 words
A device for changing the corneal curvature of nearsighted or farsighted persons comprising a length of surgical wire of small cross section for insertion into the stroma of the cornea of a human eye in a ring-like or circular channel in the stroma and adjustable means connecting opposite ends of said wire creating a ring of forces selectively adjustable to thereby permit selective change of the curvature of the cornea, said wire and said adjustable means generally lying on the annulus of the wire and adapted to be completely embedded in the cornea, the ends of said wire being threaded and the adjustable means comprising a turnbuckle having internal threads cooperatively associated with the ends of the wire.
Claim 3
Dependent Claim
23 words
A device as claimed in claim 1 wherein the wire is circular in cross section and a diameter of about 0.009 inches wire.
Claim 4
Independent Claim
145 words
A device for changing the corneal curvature of nearsighted or farsighted persons comprising a length of surgical wire of small cross section for insertion into the stroma of the cornea of a human eye in a ring-like or circular channel in the stroma and adjustable means connecting opposite ends of said wire creating a ring of forces selectively adjustable to thereby permit selective change of the curvature of the cornea, said wire and said adjustable means generally lying on the annulus of the wire and adapted to be completely embedded in the cornea, one end of said wire being threaded and said adjustable means comprising a turnbuckle having internal threads cooperatively associated with said one end of the wire, the opposite end of said wire being provided with a key which selectively fits into a bayonet type slot in one axial end of the turnbuckle.
Claim 5
Independent Claim
145 words
A device for changing the corneal curvature of nearsighted or farsighted persons comprising a length of surgical wire of small cross section for insertion into the stroma of the cornea of a human eye in a ring-like or circular channel in the stroma and adjustable means connecting opposite ends of said wire creating a ring of forces selectively adjustable to thereby permit selective change of the curvature of the cornea, said wire and said adjustable means generally lying on the annulus of the wire and adapted to be completely embedded in the cornea, one end of said wire being threaded and said adjustable means comprising a turnbuckle having internal threads cooperatively associated with said one end of the wire, the opposite end of said wire being provided with a key which selectively fits into a bayonet type slot in one axial end of the turnbuckle.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-10 | 1994-06-11 | 1994-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-10 | 1998-06-11 | 1998-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-10 | 2002-06-11 | 2002-12-11 | $7700.00 | Window Closed / Lapsed |