Surgery – Instruments – Light application
Patent
1992-01-23
1996-02-13
Shay, David M.
Surgery
Instruments
Light application
606 3, 606 13, 606 17, 606 18, 2191216, 21912174, 21912175, 21912177, 21912183, A61M 506
Patent
active
054908493
ABSTRACT:
A simultaneously generated caustic surface comprised of high energy photons is created for the purpose of ablating organic materials to within optical accuracies. The apparatus and method are principally for modifying, in vivo, the anterior cornea of the eye to effect refractive correction thereof. A catadioptric system in tandem with a continuously adjustable system of lenses provides a range of spherical or aspherical caustic curvatures throughout which range relatively uniform radiation intensity is maintained over the entire caustic. Ablation monitoring uses both visual and interferometric means; control is performed using interferometry in conjunction with a computer controlled excimer laser.
REFERENCES:
patent: 4724522 (1988-02-01), Belgorod
patent: 4887592 (1989-12-01), Loertscher
patent: 5102409 (1992-04-01), Balgorod
patent: 5141506 (1992-08-01), York
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