Method of improving photorefractive keratectomy by increasing ab

Details Method of improving photorefractive keratectomy by increasing ab Method of improving photorefractive keratectomy by increasing ab

1997-07-28

2000-06-27

Shay, David

Surgery

Instruments

Light application

606 3, 606 10, A61M 506

Patent

active

060801441

ABSTRACT:
A method of performing photorefractive keratectomy (PRK) wherein the surface smoothness is enhanced. The present invention minimizes the ablation zone dimension including central ablation depth, reducing the need for overcorrection. The present invention reduces regression and scarring (haze) providing enhanced clinical outcomes with faster rehabilitation, greater refractive stability, and improved corneal clarity. Moreover, improved clinical outcomes are achieved by adjusting the initial corneal correction to take into account the effects of regression based upon non-linear predictive formulas which vary with the square of the slope of ablation smoothness (roughness) per micron of ablation depth.

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