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Development of a vídeo keratometer for eye surgery

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Author(s):
Luis Alberto Vieira de Carvalho
Total Authors: 1
Document type: Doctoral Thesis
Press: São Carlos.
Institution: Universidade de São Paulo (USP). Instituto de Física de São Carlos
Defense date:
Examining board members:
Jarbas Caiado de Castro Neto; Harley Edison Amaral Bicas; Luciano da Fontoura Costa; Jan Frans Willem Slaets; Fatima Maria Mitsue Yasuoka
Advisor: Jarbas Caiado de Castro Neto
Abstract

In this work we have developed a new instrument for computerized monitoring of corneal central curvature during surgery. By projecting Placido Rings on the cornea, images of the reflections are digitized and processed. Algorithms based on computational vision and optical geometry determine the central curvature (-7 mm in diameter), with high performance and precision. Color coded maps in diopters (proportional to the inverse of the radius of curvature) are generated to aid the ophthalmologist during surgery. (AU)