Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1998-10-22
1999-10-05
Manuel, George
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
A61B 300
Patent
active
059633018
ABSTRACT:
A lens arrangement for use in vitreoretinal surgery includes a contact lens element including a posterior surface having a shape adapted to fit an average cornea for placement on a patient's eye and an anterior surface. The contact lens element transmits light emanating from the patient's eye for viewing a structure of the patient's eye. A flange surrounds and holds a peripheral region of the contact lens element and extends radially onto the scleral region of the patient's eye. The flange has a posterior surface with a shape adapted to fit an average scleral curvature so that the flange rests on the sclera for stabilizing a position of the contact lens on the patient's cornea. The flange includes at least one opening allowing access to an incision through which a surgical tool or instrument may be inserted into the eye.
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patent: 5046836 (1991-09-01), Volk
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Ocular Instruments, Inc., Ocular Instruments Product Catalog, 1995, various pages.
Maurice B. Landers III, M.D., et al., The Optics of Vitreous Surgery, 1981, pp. 611-614.
Kinberg Robert
Manuel George
Volk Optical Inc.
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