Method of determining the shape of an opthalmic contact lens for correcting optical aberrations of the eye beyond defocusing or astigmatism and system for implementing the method
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United States of America Patent
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Apr 30, 2002
Grant Date -
N/A
app pub date -
Sep 22, 2000
filing date -
Sep 22, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
A method of determining the shape of an ophthalmic contact lens for correcting optical aberrations of the eye beyond defocusing or astigmatism includes the steps of measuring the optical aberrations of the eye to be corrected, determining the shape of the rear face of the lens from the measured topography of the cornea in order to obtain a predetermined mechanical behavior of the lens when it is placed on the eye, measuring the optical aberrations of the eye to be corrected, and determining the shape of the front face of the lens from the measured optical aberrations of the eye to be corrected combined with data relating to the shape determined for the rear face of the lens in order to correct the aberrations. The system includes measurement units for measuring the topography and the aberrations of the eye and an electronic calculator unit.
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