Controllable liquid crystal matrix mask particularly suited for performing ophthamological surgery, a laser system with said mask and a method of using the same
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United States of America Patent
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Aug 20, 2002
Grant Date -
N/A
app pub date -
Jun 21, 2000
filing date -
Jun 21, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system and method particularly suited for controlled ablation of the cornea, using ultraviolet laser radiation, with the cornea sculpturing action resulting from a computer driven digital programmed distribution of excimer flux density across a controllable liquid crystal matrix mask to achieve a desired volume and shape of ablation for the correction of the curvature of the cornea. The optical mask, in one embodiment, is based on an arrayable matrix of individual optical pixel cells with two optical states between fully transparent to fully opaque or mirror like to the UV light. The system provides a highly versatile system for correcting known corneal defects in both regular and irregular corneas by simply executing computer customized patterns in very short time and with great precision and detail.
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