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US 4,966,452 AGranted
Contact lens for laser surgery
AssigneesOcular Instruments, Inc., Duke University
InventorsM. Bruce Shields, Phillip J. Erickson
Life of this patent
Estimating the term…
Abstract
A contact lens for use in connection with transscleral cyclophotocoagulation. The lens has a planar entry surface and a frustoconically-shaped exit surface that contacts the sclera surrounding the cornea. The central portion of the lens is opaque to prevent stray laser light from entering the optical portion of the eye during laser application.
Claims7
A lens for use in ophthalmic surgery comprising:
- a contact lens having an entry surface and a frustoconically-shaped exit surface, said exit surface being angled superiorly toward said entry surface and inwardly relative to the optical axis of said lens, said entry surface being adapted to contact a region on the sclera surrounding the cornea, said lens having a concave recess located inwardly from said exit surface, said recess having a curvature slightly steeper than the average human cornea, said recess being adapted to protect but be spaced from the corneal epithelium when said exit surface contacts said sclera.
Dependencies are inferred from the claim text.