Method of laser-sculpture of the optically used portion of the cornea
Patent 4773414 Issued on September 27, 1988. Estimated Expiration Date: 
June 8, 2007. 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.
June 8, 2007. 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 ReferencesMethod for ophthalmological surgery Method for performing ophthalmic laser surgery Patent #: 4732148 InventorAssigneeApplicationNo. 07/059617 filed on 06/08/1987US Classes:606/5Recurving or reshaping of the eyeExaminersPrimary: Kamm, William E.Assistant: Shay, David M. Attorney, Agent or FirmInternational ClassesB23K 26/08 (20060101)A61F 9/009 (20060101) A61F 9/01 (20060101) A61F 9/007 (20060101) A61B 17/30 (20060101) A61B 18/20 (20060101) A61F 9/008 (20060101) AbstractThe invention contemplates removal of epithelium-layer material from the anterior surface of the cornea, as a step preparatory to laser surgery, wherein controlled ultraviolet irradiation of the cornea is operative to surgically ablate corneal tissue within an epithelium-free area which is in the optically used central region of the cornea; the control is such (1) as first to effect essentially uniform-depth removal of Bowman's membrane to the extent of exposing only stroma tissue within said central region, and then (2) to so selectively distribute the ultraviolet radiation to then-exposed stroma tissue as to effect in stroma tissue a predetermined sculpted corrective-curvature change in the optically used region. Other important pre-surgury and post-surgery procedural steps are disclosed, for greater assurance of a predictable curvature change through the sculpting laser surgery. | |
