Ophthalmologic surgical instrument
Patent 4688570 Issued on August 25, 1987. Estimated Expiration Date: 
August 25, 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.
August 25, 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 2480737 2932296 3074407 3902475 Ophthalmological surgical instrument Contact lens corneal cutter Manual radial and chordal keratotometry apparatus Cornea incision device Ophthalmic surgery tool Patent #: 4619259 InventorsAssigneeApplicationNo. 06/483510 filed on 05/09/1983US Classes:606/166, Corneal cutter or guide for corneal cutter606/172Means to limit cutter penetration depth (e.g., dura guard)ExaminersPrimary: Thaler, Michael H.Attorney, Agent or FirmInternational ClassesA61F 9/007 (20060101)A61F 9/013 (20060101) A61B 17/32 (20060101) AbstractA surgical instrument in the form of a template comprises at least one slit formed therethrough to guide either pivotal or dragging cutting movement of a surgical blade of a scalpel therein. The instrument is preferably fixedly held, by suction, over a body area to be incised. In one embodiment, the scalpel is pivotally mounted adjacent to the slit for arcuate movement about a fixed pivot to ensure accurate and reproducible incisions. In a second embodiment, grooves are formed alongside the slit to guide dragging movement of the blade. The instrument is particularly adapted for radial keratotomy wherein a plurality of radially extending and circumferentially spaced slits are formed through the instrument. The surgical blade can be adapted for adjustment, on an angularly offset handle secured thereto, to selectively vary the depth of the incision.Other References
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