Method for correcting refractive disorders

Details Method for correcting refractive disorders Method for correcting refractive disorders

1993-03-23

1994-09-20

Shay, David M.

Surgery

Instruments

Light application

606 3, 606 10, 128898, A61B 506

Patent

active

053485513

ABSTRACT:
A method for changing the shape of the cornea of an eye to correct refractive disorders comprises employing laser radiation having a selected wavelength, beam pattern, and beam power profile, and employing this radiation for a selected time duration, wherein the wavelength, beam pattern, beam power profile and time duration are chosen to selectively kill or injure keratocytes and to avoid shrinking the collagen in a selected treatment volume of the cornea which has a posterior boundary which is at least 10% of the total stromal depth, and preferably between 50-90% of the stromal depth.

REFERENCES:
patent: 5137530 (1992-08-01), Sand
patent: 5263951 (1993-11-01), Spears et al.
"Ophthalmic Applications of Infrared Lasers-Thermal Considerations" by Mainster; Invest Ophthalmol Visual Sci., vol. 18, NO. 4; Apr. 1979 pp. 414-420.

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