US5405355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of radial keratotomy employing a vibrating cutting blade
Assignee: Vitrophage Inc
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Filing: 1993-09-10
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Granted: 1995-04-11
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Expires: 2013-09-10
Abstract
Abstract Radial keratotomies can be performed by incising centrifugally. A vibrating diamond front cutting blade with a reverse cutting edge incises centrifugally to form a squared-off incision at the optical zone. The incision can be retraced if an enhancement is necessary with the vibrating blade without tearing the collagen or resulting in blade setting variability or variability due to corneal compression.
Inventors
- 👤 Gholam A. Peyman
- 👤 Stephen A. Updegraff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:39
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61F9/013; A61F9/0133; A61B; A61B17/00; A61B17/32; A61B17/320068; A61B2017/320082; A61B90/00; A61B90/03; A61B2090/033; A61B2090/036
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
97 words
A method of performing a radial keratotomy operation using a vibrating cutting blade having a tip and a foot plate spaced above said tip, which method comprises: inserting said cutting blade into the optical zone of the cornea to the depth of said foot plate while vibrating said cutting blade; and centrifugally incising the cornea at the full depth of said foot plate while vibrating said cutting blade so as to form a corneal incision in a single pass having a constant fixed predictable depth for the length of Said pass without irregularly tearing the corneal collagen.
Claim 2
Independent Claim
97 words
A method of performing a radial keratotomy operation using a vibrating cutting blade having a tip and a foot plate spaced above said tip, which method comprises: inserting said cutting blade into the optical zone of the cornea to the depth of said foot plate while vibrating said cutting blade; and centrifugally incising the cornea at the full depth of said foot plate while vibrating said cutting blade so as to form a corneal incision in a single pass having a constant fixed predictable depth for the length of Said pass without irregularly tearing the corneal collagen.
Claim 3
Dependent Claim
15 words
The method of claim 1 further comprising retracing said centrifugal corneal incision with said blade.
Claim 4
Dependent Claim
17 words
The method of claim 1 wherein said vibrating blade has a diamond front and reverse cutting edge.
Claim 5
Dependent Claim
22 words
The method of claim 1 wherein said vibrating blade is attached to a vibrating blade handle thereby causing said blade to vibrate.
Claim 6
Dependent Claim
13 words
The method of claim 1 conducted by laterally or coaxially vibrating said blade.
Claim 7
Dependent Claim
11 words
The method of claim 1 conducted by ultrasonically vibrating said blade.
Claim 8
Dependent Claim
21 words
The method of claim 1 employing a 200-215 u reverse-edge cutting blade for squaring-off the corneal incision at the optical zone.
References Cited (Backward Citations)
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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) | 1998-04-10 | 1998-10-10 | 1999-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-10 | 2002-10-10 | 2003-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-10 | 2006-10-10 | 2007-04-11 | $7700.00 | Window Closed / Lapsed |