Corneo-scleral topography system
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United States of America Patent
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Jan 11, 2011
Grant Date -
Jan 24, 2008
app pub date -
Jul 30, 2007
filing date -
Feb 14, 2006
priority date (Note) -
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Abstract
An advanced rasterstereography-based corneo-scleral topography (RCT) device includes an LED-based grid projection/illumination assembly, a grid image viewing assembly, and an optionally integratable front view camera assembly. The assemblies each include telephoto optical systems that provide a compact structure, an increased depth of field, and an increased field of view that allow sufficient acquisition of data in a single acquired image to provide the desired corneo-scleral topography analysis. The device utilizes a novel image processing algorithm. The device and method provide the capability to map a feature from a raw grid image onto a topography map of the corneo-scleral region, and to simultaneously display the images if selected by the user. The hardware, software, mechanical, electrical, and optical design considerations and integration provide advantages and benefits over prior RCT-type, Placido-based, and other conventional corneal topographers.
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