Patent US5063942A successfully refreshed from Google Patents.
US5063942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for surgically re-profiling the cornea
Assignee: CORNEAL CONTOURING DEVELOPMENT LLC
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Filing: 1989-12-14
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Granted: 1991-11-12
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Expires: 2009-12-14
Abstract
Abstract Refractive error of the cornea is corrected by a scraping procedure of rotating or oscillating a sharpened knife edge blade that is tangential to and against a top of the cornea at its center axis, and micro-axially advanced until the refractive error has been corrected.
Inventors
- 👤 Lauren G. Kilmer
- 👤 Alvin E. Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:38
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61F; A61F9/00; A61F9/007; A61F9/013
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
64 words
A method of correcting refractive error in an eye having a cornea with a center axis comprising the steps of: positioning a sharpened knife edge blade tangentially to and against a top at its center axis, manually rotating or oscillating said knife edge about said axis so as to scrape said cornea with said knife edge until said refractive error has been substantially corrected.
Claim 2
Independent Claim
64 words
A method of correcting refractive error in an eye having a cornea with a center axis comprising the steps of: positioning a sharpened knife edge blade tangentially to and against a top at its center axis, manually rotating or oscillating said knife edge about said axis so as to scrape said cornea with said knife edge until said refractive error has been substantially corrected.
Claim 3
Independent Claim
66 words
A method of correcting refractive error in an eye having a cornea with a center axis comprising the steps of: positioning a sharpened knife edge blade tangentially to and against a top of said cornea at its center axis, rotating or oscillating said knife edge about said axis so as to scrape said cornea with said knife edge until said refractive error has been substantially corrected.
Claim 4
Independent Claim
66 words
A method of correcting refractive error in an eye having a cornea with a center axis comprising the steps of: positioning a sharpened knife edge blade tangentially to and against a top of said cornea at its center axis, rotating or oscillating said knife edge about said axis so as to scrape said cornea with said knife edge until said refractive error has been substantially corrected.
Claim 5
Independent Claim
79 words
A method of correcting refractive error in an eye having a cornea comprising the steps of: pressing a sharpened knife edge blade tangentially to and against an anterior surface of said cornea; rotating or oscillating said sharpened blade about a vertical axis that is substantially co-axial with a geometric vertical axis of said cornea so as to scrape said cornea with said knife edge; axially advancing said blade incrementally against said cornea until said refractive error has been corrected.
Claim 6
Independent Claim
79 words
A method of correcting refractive error in an eye having a cornea comprising the steps of: pressing a sharpened knife edge blade tangentially to and against an anterior surface of said cornea; rotating or oscillating said sharpened blade about a vertical axis that is substantially co-axial with a geometric vertical axis of said cornea so as to scrape said cornea with said knife edge; axially advancing said blade incrementally against said cornea until said refractive error has been corrected.
Claim 7
Independent Claim
118 words
A method of reprofiling the corneal portion of an eye to change the corneal radius and thus correct refractive errors, comprising the steps of: determining the amount of said refractive error; creating a visual topographic keratograph of said corneal portion of said eye; comparing said visual keratograph with a visual display means showing the corneal radius as corrected for said refractive error; positioning a sharpened knife edge blade and scraping tool within a holding sleeve contiguous to and co-axial to a vertical axis said cornea; pressing said sharpened blade tangentially against said cornea; rotating said tool about said vertical axis and continuing said rotating of said tool; monitoring said eratograph until said refractive error has been substantially corrected.
Claim 8
Independent Claim
118 words
A method of reprofiling the corneal portion of an eye to change the corneal radius and thus correct refractive errors, comprising the steps of: determining the amount of said refractive error; creating a visual topographic keratograph of said corneal portion of said eye; comparing said visual keratograph with a visual display means showing the corneal radius as corrected for said refractive error; positioning a sharpened knife edge blade and scraping tool within a holding sleeve contiguous to and co-axial to a vertical axis said cornea; pressing said sharpened blade tangentially against said cornea; rotating said tool about said vertical axis and continuing said rotating of said tool; monitoring said eratograph until said refractive error has been substantially corrected.
Claim 9
Independent Claim
99 words
A method of correcting refractive error in an eye having a cornea defined anteriorly in the cornea by essentially an epithelium layer and a stroma portion comprising the steps of: positioning a sharpened knife edge blade tangentially to and against a top at its center axis of said cornea, manually rotating or oscillating said knife edge about said axis while simultaneously pressing and advancing said tool in controlled axial incremental amounts a gains said corneal epithelium layer and thence said stroma portion so as to scrape said cornea with said knife edge until said refractive error is substantially corrected.
Claim 10
Independent Claim
99 words
A method of correcting refractive error in an eye having a cornea defined anteriorly in the cornea by essentially an epithelium layer and a stroma portion comprising the steps of: positioning a sharpened knife edge blade tangentially to and against a top at its center axis of said cornea, manually rotating or oscillating said knife edge about said axis while simultaneously pressing and advancing said tool in controlled axial incremental amounts a gains said corneal epithelium layer and thence said stroma portion so as to scrape said cornea with said knife edge until said refractive error is substantially corrected.
References Cited (Backward Citations)
US2249906A
Cited
US2480737A
Cited
US3172404A
Cited
US3976077A
Cited
US4173980A
Cited
US4526171A
Cited
US4619259A
Cited
US4688570A
Cited
US4381007A
Cited
US4490022A
Cited
US4423728A
Cited
US4729372A
Cited
US4770172A
Cited
US4718418A
Cited
US4665913A
Cited
DE3433581A1
Cited
US4750491A
Cited
US4763651A
Cited
FR2595243A1
Cited
US4724522A
Cited
US4838266A
Cited
US4840175A
Cited
US4798204A
Cited
EP0303174A1
Cited
US4834748A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-11 | 1995-05-13 | 1995-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-11 | 1999-05-13 | 1999-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-11 | 2003-05-13 | 2003-11-12 | $7700.00 | Window Closed / Lapsed |