Method of laser-sculpture of the optically used portion of the cornea
Patent 4798204 Issued on January 17, 1989. Estimated Expiration Date: 
July 29, 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.
July 29, 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 Patent #: 4665913 InventorAssigneeApplicationNo. 07/080398 filed on 07/29/1987US Classes:606/5, Recurving or reshaping of the eye606/166Corneal cutter or guide for corneal cutterExaminersPrimary: Kamm, William E.Assistant: Shay, David M. Attorney, Agent or FirmInternational ClassesA61F 9/009 (20060101)A61F 9/007 (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 sculpting 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. For corrective sculpting recurvatures involving relatively small diopter change, the sculpture proceeds via selectively distributed ultraviolet radiation to the epithelium-free area, with penetration essentially only or at least predominantly in the tissue of Bowman's membrane, thus achieving the corrected-curvature profile essentially only or predominantly in the tissue of Bowman's membrane. | |
