US5443473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for treating myopia
Assignee: Anika Therapeutics Inc
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Filing: 1992-03-15
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Granted: 1995-08-22
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Expires: 2012-03-15
Abstract
Abstract A method for treating a myopic eye or eye with other refractive errors is provided. The method includes forming a circular cut in the anterial lamina of the cornea, forming a pocket in the lamella beneath the weakened anterial lamina, and inserting an intrastromal lens within the pocket to alter the radius of curvature of the anterial lamina. Devices for weakening the anterial lamina and for forming the pocket within the lamella are also disclosed.
Inventors
- 👤 David Miller
- 👤 Edward Perez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:43
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/147; A61F2/145; A61F2/148
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
145 words
A method for changing the radius of curvative of the cornea of an eye to correct a refractive error, comprising the steps of: a) forming a first circular incision partially into the anterial lamina of the cornea of the eye to weaken said anterial lamina; b) forming a second incision which is separate from and adjacent to said first incision, said second incision extending into the lamella of the cornea to form a pocket within the lamella beneath the weakened anterial lamina; c) enclosing a hydrogel lens within said pocket, said hydrogel lens having a refractive index substantially equal to the refractive index of the cornea and said hydrogel lens cooperating with said weakened anterial lamina to change said radius of curvature of said cornea and thereby correct said refractive error; and d) closing said second incision, thereby sealing said hydrogel lens within the alamella.
Claim 2
Independent Claim
145 words
A method for changing the radius of curvative of the cornea of an eye to correct a refractive error, comprising the steps of: a) forming a first circular incision partially into the anterial lamina of the cornea of the eye to weaken said anterial lamina; b) forming a second incision which is separate from and adjacent to said first incision, said second incision extending into the lamella of the cornea to form a pocket within the lamella beneath the weakened anterial lamina; c) enclosing a hydrogel lens within said pocket, said hydrogel lens having a refractive index substantially equal to the refractive index of the cornea and said hydrogel lens cooperating with said weakened anterial lamina to change said radius of curvature of said cornea and thereby correct said refractive error; and d) closing said second incision, thereby sealing said hydrogel lens within the alamella.
Claim 3
Dependent Claim
18 words
The method of claim 1, wherein said pocket is formed by a keratome inserted through said second incision.
Claim 4
Dependent Claim
21 words
The method of claim 2 further comprising the step of directing a water spray through said keratome to form said pocket.
Claim 5
Dependent Claim
18 words
The method of claim 1 wherein said sealing step comprises applying a surgical plaster to said second incision.
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) | 1998-08-21 | 1999-02-20 | 1999-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-21 | 2003-02-20 | 2003-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-21 | 2007-02-20 | 2007-08-22 | $7700.00 | Window Closed / Lapsed |