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US4834748A
Expired / Lapsed
US
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Method and apparatus for removing corneal tissue
Assignee: Johnson and Johnson Surgical Vision Inc
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Filing: 1987-09-29
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Granted: 1989-05-30
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Expires: 2007-09-29
Abstract
Abstract Corneal tissue and, in particular, Bowman's membrane is removed by abrading an annular zone of the cornea. The corneal tissue is abraded by rotating an abrading tool having an annular abrading surface in contact with the cornea. A corneal onlay can be attached to the abraded zone of the cornea.
Inventors
- 👤 Marguerite B. McDonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:20
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61F9/013; Y; Y10; Y10S; Y10S623/00; Y10S623/902; Y10S623/905; Y10S623/906
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
37 words
A method of attaching a corneal onlay to the cornea comprising: abrading a region of Bowman's membrane of the cornea to provide an abraded zone of the cornea; and attaching a corneal onlay to said abraded zone.
Claim 2
Independent Claim
37 words
A method of attaching a corneal onlay to the cornea comprising: abrading a region of Bowman's membrane of the cornea to provide an abraded zone of the cornea; and attaching a corneal onlay to said abraded zone.
Claim 3
Dependent Claim
17 words
A method as defined in claim 1 wherein said step of abrading renders said abraded zone annular.
Claim 4
Dependent Claim
36 words
A method as defined in claim 1 including providing an abrading tool having an annular abrading surface and said step of abrading includes rotating the abrading tool with the abrading surface in contact with Bowman's membrane.
Claim 5
Dependent Claim
23 words
A method as defined in claim 3 wherein said step of rotating includes rotating the abrading tool at least about five thousand rpm.
Claim 6
Dependent Claim
35 words
A method as defined in claim 3 wherein said step of providing includes providing the abrading surface generally in the form of a segment of a sphere which generally matches the curvature of the cornea.
Claim 7
Dependent Claim
25 words
A method as defined in claim 3 wherein said step of providing includes providing the abrading surface generally in the form of a frusto-conical section.
Claim 8
Dependent Claim
62 words
A method as defined in claim 3 wherein the abrading surface is relatively rough, said step of rotating causes the abrading surface to abrade corneal tissue with at least some of said tissue attaching to the abrading surface to reduce its roughness and abrading ability and terminating said step of abrading when the abrading ability of the abrading surface is substantially reduced.
Claim 9
Dependent Claim
83 words
An abrading tool for use in abrading corneal tissue comprising: a body having an axis and a distal end; means defining an abrading surface essentially at said distal end of said body, said abrading surface being relatively rough and being of generally annular configuration about said axis; said abrading surface being inclined proximally as it extends radially inwardly; and said abrading surface including a segment of a sphere having a curvature to generally match the curvature of a cornea of a human eye.
Claim 10
Dependent Claim
83 words
An abrading tool for use in abrading corneal tissue comprising: a body having an axis and a distal end; means defining an abrading surface essentially at said distal end of said body, said abrading surface being relatively rough and being of generally annular configuration about said axis; said abrading surface being inclined proximally as it extends radially inwardly; and said abrading surface including a segment of a sphere having a curvature to generally match the curvature of a cornea of a human eye.
Claim 11
Dependent Claim
25 words
An abrading tool as defined in claim 8 wherein said body has an axially opening cavity adjacent the inner periphery of the annular abrading surface.
Claim 12
Dependent Claim
26 words
An abrading tool as defined in claim 8 including a shaft coupled to said body and having an axis coaxial with the axis of the body.
Claim 13
Dependent Claim
22 words
An abrading tool as defined in claim 8 wherein said means defining the abrading surface includes abrasive particles adhered to said body.
Claim 14
Dependent Claim
25 words
An abrading tool as defined in claim 11 wherein said body has an axially opening cavity adjacent the inner periphery of the annular abrading surface.
Claim 15
Dependent Claim
93 words
An abrading tool for use in abrading corneal tissue comprising: a body having an axis and a distal end; means defining an abrading surface essentially at said distal end of said body, said abrading surface being relatively rough and being of generally annular configuration about said axis; said abrading surface being inclined proximally as it extends radially inwardly; and said abrading surface having an outer circular periphery of no more than about twelve millimeters and an inner circular periphery of about 1.5 to two millimeters less than the diameter of the outer periphery.
Claim 16
Dependent Claim
93 words
An abrading tool for use in abrading corneal tissue comprising: a body having an axis and a distal end; means defining an abrading surface essentially at said distal end of said body, said abrading surface being relatively rough and being of generally annular configuration about said axis; said abrading surface being inclined proximally as it extends radially inwardly; and said abrading surface having an outer circular periphery of no more than about twelve millimeters and an inner circular periphery of about 1.5 to two millimeters less than the diameter of the outer periphery.
Claim 17
Dependent Claim
16 words
An abrading tool as defined in claim 13 wherein said abrading surface includes a frusto-conical section.
Claim 18
Dependent Claim
33 words
An abrading tool as defined in claim 13 wherein the abrading surface includes a segment of a sphere having a curvature to generally match the curvature of a cornea of a human eye.
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) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |