Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1994-02-24
1995-12-12
Sikes, William L.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351247, 351221, A61B 310
Patent
active
054754526
ABSTRACT:
This invention provides a method and apparatus for mapping the surface of an object, in particular, a transparent object such as anterior and posterior surfaces of a patient's cornea, in a clinically useful time using a single optical system. In a preferred embodiment, a pattern generator projects a pattern of light and dark areas onto a patient's cornea, and a light detector receives patterns reflected from the anterior and posterior surfaces of the cornea. A mapping means generates a three-dimensional map of the anterior and posterior corneal surfaces from information regarding the projected and detected light patterns. The invention can be used to map other transparent objects such as a contact lens or an intraocular device, e.g., an intrastromal ring. The invention can also be used to map the surface of an opaque object.
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Baker Phillip C.
Kuhn William P.
KeraVision Inc.
Mai Huy
Sikes William L.
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