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US Patent 5997529 - Compound astigmatic myopia or hyperopia correction by laser ablation
US Patent Issued on December 7, 1999
Estimated Patent Expiration Date:
October 27, 2017Estimated 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.
Estimated Patent Expiration Date:
October 27, 2017Estimated 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.AbstractAn apparatus is provided for performing corneal refractive surgery by ablating a portion of a corneal surface of an eye. The apparatus includes a pulsed laser for producing a pulsed output beam of light. A scanning mechanism scans the output beam, and the output beam is operatively associated with the scanning mechanism such that the output beam may be scanned over a predetermined surface defined by a mathematically derived ablation layer boundary curve for each ablation layer. A controller is operatively associated with the scanning mechanism so as to deliver output beams to the predetermined surface such that center points of output beams may be disposed within the ablation layer boundary curve, on the ablation layer boundary curve, and outside but within a predetermined distance from a nearest point on the ablation layer boundary curve so as to integrate the edges of the ablation layer boundary curve to more closely correspond to the desired ablated shape.Other References
| InventorsApplicationNo. 957608 filed on 10/27/1997US Classes:606/4, Ophthalmic606/5Recurving or reshaping of the eyeField of Search606/4, Ophthalmic606/5, Recurving or reshaping of the eye606/13, Applicators606/10, Systems606/9, Dermatological219/121.6, Using laser600/300, DIAGNOSTIC TESTING600/301, Via monitoring a plurality of physiological data, e.g., pulse and blood pressure600/558Eye or testing by visual stimulusExaminersPrimary: Dvorak, Linda C. M.Assistant: Gibson, Randy W. 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Foreign Patent References
International ClassA61B 017/36 |
