Method for performing ophthalmic laser surgery
Patent 4732148 Issued on March 22, 1988. Estimated Expiration Date: 
July 31, 2006. 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.
July 31, 2006. 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.InventorAssigneeApplicationNo. 06/891285 filed on 07/31/1986US Classes:606/5, Recurving or reshaping of the eye219/121.67, Cutting219/121.73, Shaping219/121.74, With mirror351/221, Including illuminator359/209, Including transmissive type moving element359/210, Having moving lens359/889Movable in or out of optical pathExaminersPrimary: Cohen, Lee S.Assistant: Shay, David M. Attorney, Agent or FirmInternational ClassesB23K 26/08 (20060101)A61F 9/009 (20060101) A61F 9/007 (20060101) A61F 9/01 (20060101) A61B 17/30 (20060101) A61B 18/20 (20060101) A61F 9/008 (20060101) AbstractThe invention contemplates controlled ablation of the cornea, using ultraviolet laser radiation, wherein irradiated flux density and exposure time are so controlled as to achieve desired depth of the ablation. Sculpturing action results from controlled change of projected laser-spot size, in the course of a given treatment, wherein, in one illustrative case, projected laser-spot size ranges from a maximum which covers the entire area to be treated, down to a predetermined minimum tolerable size, wherein cornea-curvature change is myopia-corrective. Further illustrative techniques and situations are also disclosed, for achievement of hyperopia correction, for astigmatism correction, and in connection with corneal-transplant operations.Other References
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