US5741245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corneal sculpting using laser energy
Assignee: HERKIMER LLC
•
Filing: 1995-02-06
•
Granted: 1998-04-21
•
Expires: 2015-02-06
Abstract
Abstract A corneal sculpting system utilized for performing surgery to reshape the cornea of the eye. The system includes a laser delivery system that is coupled to a filter positioning system and a corneal topography system. The filter positioning system suspends a sculpting filter above the surface of the cornea. The sculpting filter controls the level of tissue removal that occurs in each area of the cornea by absorbing a certain percentage of the incident laser energy in various areas of the filter. The positioning system also has a conduit for delivering water to the corneal surface. A thin layer of water is heated by the application of the laser to cause microexplosions that dislodge and propel the tissue to ablate the cornea. The corneal topography system provides real time feedback on the curvature of the cornea, before during and after the surgery.
Inventors
- 👤 Colette Cozean
- 👤 Robert J. Freiberg
- 👤 HeeJung Koh Wescoat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:58
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61F9/008; A61F9/00802; A61F9/00804; A61B; A61B17/00; A61B2017/00017; A61B2017/00137; A61B2017/00154; A61B2017/00172; A61B2017/00973; A61B18/00; A61B18/18; A61B18/20; A61B2018/2035; A61B2018/204; A61F2009/00844; A61F2009/00861; A61F2009/00872; A61F2009/00878; A61F2009/00882
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
90 words
A method of removing corneal tissue from a cornea of an eye of a patient, comprising: forming a layer of liquid which is reactive to laser radiation of a predetermined wavelength on a surface of the cornea at a thickness selected to cause microexplosions in said liquid at the surface of the cornea when subjected to said laser radiation of said predetermined wavelength; directing said laser radiation of said predetermined wavelength onto said liquid; and using said microexplosions in said liquid to remove particles of corneal tissue from said cornea.
Claim 2
Independent Claim
90 words
A method of removing corneal tissue from a cornea of an eye of a patient, comprising: forming a layer of liquid which is reactive to laser radiation of a predetermined wavelength on a surface of the cornea at a thickness selected to cause microexplosions in said liquid at the surface of the cornea when subjected to said laser radiation of said predetermined wavelength; directing said laser radiation of said predetermined wavelength onto said liquid; and using said microexplosions in said liquid to remove particles of corneal tissue from said cornea.
Claim 3
Dependent Claim
27 words
The method of claim 1, wherein said directing step comprises the step of directing laser radiation having a wavelength of about 3 microns on said corneal tissue.
Claim 4
Dependent Claim
21 words
The method of claim 1, wherein said forming step comprises the step of forming a layer of water on said cornea.
Claim 5
Dependent Claim
25 words
The method of claim 1, additionally comprising the steps of attaching a positioning device to said eye and injecting said liquid through said positioning device.
Claim 6
Dependent Claim
49 words
The method of claim 1, wherein said directing step comprises the step of irradiating said cornea with a laser beam having a spot size which covers a substantial portion of said cornea, and wherein said ablating step comprises the step of simultaneously ablating corneal tissue within said spot size.
Claim 7
Dependent Claim
60 words
The method of claim 1, wherein said directing step comprises the step of passing said laser radiation through a filter comprising an attenuating liquid to provide a predetermined intensity profile for said beam, and wherein said ablating step comprises the step of using said predetermined intensity profile to non-uniformly ablate said cornea, and thereby alter the shape of said cornea.
Claim 8
Dependent Claim
25 words
The method of claim 1, additionally comprising the step of applying suction to said cornea of said eye to remove said particles of corneal tissue.
Claim 9
Dependent Claim
25 words
The method of claim 1, additionally comprising the step of applying fluid to said cornea of said eye to remove said particles of corneal tissue.
Claim 10
Dependent Claim
18 words
The method of claim 1, additionally comprising generating said microexplosions by producing a thermal reaction in said liquid.
References Cited (Backward Citations)
US4173980A
Cited
GB2023004A
Cited
US4326529A
Cited
SU831119A1
Cited
US4381007A
Cited
US4497319A
Cited
US4712543A
Cited
US4461294A
Cited
DE3335696A1
Cited
US4718418A
Cited
US4732148A
Cited
US5188631A
Cited
US5207668A
Cited
US5219343A
Cited
US4665913A
Cited
US4773414A
Cited
US4770172A
Cited
US4729372A
Cited
US5108388A
Cited
US5108388B1
Cited
US4580559A
Cited
US4721379A
Cited
US4669466A
Cited
US4973330A
Cited
US4648400A
Cited
US4941093A
Cited
US4994058A
Cited
WO1987005496A1
Cited
US4887600A
Cited
US4724522A
Cited
US4826431A
Cited
US4838266A
Cited
US4911711A
Cited
US4744360A
Cited
US4840175A
Cited
US5019074A
Cited
US4856513A
Cited
US4798204A
Cited
US4887592A
Cited
US5163934A
Cited
US5133708A
Cited
US4901718A
Cited
US4848340A
Cited
US4881808A
Cited
US4907586A
Cited
US5219344A
Cited
US4953969A
Cited
US4903695A
Cited
US4903695C1
Cited
WO1990012618A1
Cited
US4988348A
Cited
EP0402250A2
Cited
US5074859A
Cited
WO1991011158A1
Cited
US5092863A
Cited
JPH0475654A
Cited
WO1992001430A1
Cited
WO1993008677A2
Cited
DE4202505A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-04-20 | 2001-10-20 | 2002-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-04-20 | 2005-10-20 | 2006-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-04-20 | 2009-10-20 | 2010-04-21 | $7700.00 | Window Closed / Lapsed |