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US Patent 5616139 - Method and apparatus for operating a cornea
US Patent Issued on April 1, 1997
Estimated Patent Expiration Date:
July 20, 2014Estimated 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:
July 20, 2014Estimated 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.AbstractMethod and apparatus of operating the cornea by using an ultraviolet laser, such as an excimer laser, for correcting an abnormal curvature of the cornea, such as myopia, hyperopia, and astigmatism, or for treating opacity of the cornea, uses a cooling device for cooling the cornea before, during, or after the operation, or all three. A liquid medicine for promoting healing is sprinkled or sprayed onto the cornea using a sprinkling device, which can be incorporated in the cooling device. A laser beam is irradiated after the excess liquid medicine is removed from the cornea using a suction device, which can also be incorporated in the cooling device. Due to the cooling of the cornea and the medicine application, the undesirable side effects from a photochemical reaction of the laser beam can be reduced. | InventorApplicationNo. 256547 filed on 07/20/1994US Classes:606/4OphthalmicField of Search606/4, Ophthalmic606/5, Recurving or reshaping of the eye606/6, Cataracts or glaucoma604/22, With means for cutting, scarifying, or vibrating (e.g., ultrasonic, etc.) tissue604/23, Gas application604/24, Gas mixed with other material604/294, Means for treating eye or surface of ocular cavity604/297, Having means for scavenging liquid after contact with eye604/298, Having means for metering liquid flow to eye604/300, Having means for positioning liquid dispenser relative to eye604/301, Eye cup604/302Guard or guideExaminersPrimary: Sykes, Angela D.Assistant: Ogugua, Sonya Harris Attorney, Agent or FirmUS Patent References3769963, 4326529, Corneal-shaping electrodeIssued on: 04/27/1982 Inventor: Doss , et al.4623337, Liquid dispensing apparatus Issued on: 11/18/1986 Inventor: Maurice4718418, Apparatus for ophthalmological surgery Issued on: 01/12/1988 Inventor: L'Esperance, Jr.4820264, Infusion instrument Issued on: 04/11/1989 Inventor: Matsui , et al.4994058, Surface shaping using lasers Issued on: 02/19/1991 Inventor: Raven, et al.5009660, Gas purging, eye fixation hand piece Issued on: 04/23/1991 Inventor: Clapham5108412Suction ring for surgical operations on the human eye Issued on: 04/28/1992 Inventor: Krumeich, et al. Foreign Patent References
International ClassesA61F 009/00A61N 005/00 Foreign Application Priority Data1992-11-20 JP |
