Method of corneal analysis using a checkered placido apparatus
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United States of America Patent
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-
Sep 17, 2002
Grant Date -
Dec 27, 2001
app pub date -
Apr 9, 2001
filing date -
Jun 2, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for analysis of the curvature of the surface of a cornea using a checkered placido comprises, projecting the image of the checkered placido onto a patient's cornea, detecting the image of the checkered placido reflected off of the cornea, detecting a plurality of nodal points from the reflected image, determining the mean curvature at a plurality of nodal points and analyzing the mean curvature at a plurality of nodal points in order to produce a graphic display of the estimated actual curvature of the cornea.
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