Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1997-10-23
1999-09-14
Manuel, George
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
A61B 314
Patent
active
059531002
ABSTRACT:
The invention relates to the art of corneal topography. More specifically, the invention provides many methods and apparatuses for advancing the ease and accuracy of corneal topography. In addition to a front-view camera, one embodiment provides a side (temporal) view camera for viewing the cornea or other reflective surface. The side-view camera may capture a true image of the cornea as well as a reflected placido pattern. The information contained in these images provides capability to automatically find the apex, location of the limbus, vertical profile and curvature out to the limbus. These abilities lead to improved methods for autocalibration and autopositioning as well as other advantages in the field of corneal mapping.
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D'Souza Henry
Sarver Edwin J.
Eyesys-Premier, Inc.
Manuel George
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