Multi-camera corneal analysis system
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United States of America Patent
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Dec 8, 1998
Issued Date -
N/A
app pub date -
Apr 25, 1996
filing date -
Oct 28, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
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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