Method and apparatus for removing cataractous lens tissue by laser radiation
Patent 4538608 Issued on September 3, 1985. Estimated Expiration Date: 
June 6, 2004. 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 6, 2004. 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 References 3653384 3720213 3783874 3828788 Method of non-surgical treatment of cataracts Two-dimensional laser scanning system Surgical apparatus for removal of tissue 4091814 Process and apparatus for ophthalmic surgery Method for the surgical treatment of the eye InventorApplicationNo. 06/617931 filed on 06/06/1984US Classes:606/3, With particular wavelength372/24, Scanning606/10, Systems606/18, Mirror606/5, Recurving or reshaping of the eye606/6Cataracts or glaucomaExaminersPrimary: Gantz, D. E.Assistant: Johnson, Lance Attorney, Agent or FirmInternational ClassesA61F 9/007 (20060101)A61F 9/008 (20060101) A61F 9/011 (20060101) AbstractThe invention involves the apparatus and the technique for non-invasive surgery to remove cataracted-lens tissue from an afflicted lens. The beam output of a laser is focused to a spot of maximum power density at the anterior surface of a cataracted lens and scanned over a predetermined area or areas of the cataracted lens. The beam is selective and safe since it's diffuse as it enters the eye through the cornea and is also diffuse (being divergent) in the unlikely event that the beam passes through an opening it has created in the cataracted lens. This diffusion assures against damage to either or both of the cornea and the retina. Focal power levels are used sufficient to achieve cataract material destruction thru ablative photodecomposition, thermal decomposition, photofragmentation, photoemulsification or any combination thereof. Various features are disclosed for assuring safety and uniformity in the removal of involved tissue.Other References
| |
