Device used for the photorefractive keratectomy of the eye using a centering method
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United States of America Patent
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Oct 12, 2004
Grant Date -
Sep 12, 2002
app pub date -
Aug 15, 2001
filing date -
Dec 22, 1999
priority date (Note) -
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Abstract
The invention relates to a device used for the photorefractive keratectomy of the eye, especially LASIK, uses an UV laser beam for ablating parts of the cornea. A centering light beam is arranged coaxially with respect to the fixing light beam and has a wavelength different from that of the fixing light beam. The device is provided with devices for measuring and evaluating the position of the scattered light/Fresnel reflection of the centering light beam on the front face of the cornea. The point in which the centering light beam passes through the front face of the cornea is used as the center of ablation.
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