Method for modifying corneal curvature
January 22, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesDual balloon catheter device Apparatus and process for recurving the cornea of an eye Apparatus for and method of utilizing energy to excise pathological tissue Ophthalmic surgery system Method for ophthalmological surgery Method and apparatus for analysis and correction of abnormal refractive errors of the eye Apparatus for ophthalmological surgery Apparatus for performing ophthalmic laser surgery Method for performing ophthalmic laser surgery Patent #: 4732148 InventorApplicationNo. 07/148170 filed on 01/22/1988US Classes:606/5Recurving or reshaping of the eyeExaminersPrimary: Cohen, Lee S.Assistant: Shay, David M. Attorney, Agent or FirmInternational ClassesA61F 9/01 (20060101)A61F 9/007 (20060101) A61B 18/20 (20060101) A61B 18/22 (20060101) A61F 9/008 (20060101) AbstractA method and apparatus for modifying the curvature of a live cornea via use of an excimer laser. The live cornea has a thin layer removed therefrom leaving an exposed internal surface thereon. Then, either the surface or thin layer is exposed to the laser beam along a predetermined pattern to ablate desired portions. The thin layer is then replaced onto the surface. Ablating a central area of the surface or thin layer makes the cornea less curved, while ablating an annular area spaced from the center of the surface or layer makes the cornea more curved. The desired predetermined pattern is formed by use of a variable diaphragm, a rotating orifice of variable size, a movable mirror or a movable fiber optic cable through which the laser beam is directed towards the exposed internal surface or removed thin layer.Other References
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