Stereo view reflection corneal topography
AssigneeLaserSight Technologies, Inc.
InventorsEd Sarver, David Liu
Life of this patent
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Abstract
A stereo target corneal topography apparatus and method that uses two differently angled views of a target pattern reflected from a cornea to measure the shape of a cornea using a stereo reconstruction module to reconstruct the shape of a surface of a cornea. The surface elevation, surface slope and/or surface power may be determined without the need to make an initial assumption about the shape of the cornea.
Claims40
A stereo target corneal topography system comprising:
- a target source illuminated by at least one illumination source to generate a target pattern;
- at least two camera views oriented at different angles with respect to a cornea to be measured;
- and
- a stereo image reconstructor to reconstruct a shape of said cornea from at least two differently angled views of said target pattern reflected from said cornea.
A stereo reconstructor used to measure a shape of a cornea, comprising:
- a processor arranged and adapted to reconstruct said shape of a surface of said cornea using data obtained from at least two differently angled views of a target pattern reflected from said cornea.
A method of reconstructing a shape of a cornea, comprising:
- obtaining at least two differently angled views of a keratometric target pattern reflected from said cornea;
- and
- reconstructing said shape of said cornea using data obtained from said at least two differently angled views of said reflected target pattern.
A stereo target corneal topography device, comprising:
- means for obtaining at least two differently angled views of a target pattern reflected from said cornea;
- and
- means for reconstructing a shape of said cornea using data obtained from said at least two differently angled views of said reflected target pattern.
Dependencies are inferred from the claim text.