초록 ▼

A multizone, multipass photorefractive keratectomy (MP-PRK) technique to treat 315 eyes with the 193-nm VISX 20/20 excimer laser. The procedure includes making multipass ablations that increase in ablative depth to create as step-wise ablation of the corneal to the predetermined dioptric correction.

A multizone, multipass photorefractive keratectomy (MP-PRK) technique to treat 315 eyes with the 193-nm VISX 20/20 excimer laser. The procedure includes making multipass ablations that increase in ablative depth to create as step-wise ablation of the corneal to the predetermined dioptric correction. It also includes making multizone ablations that create of variable widths that result in a predetermined ablative depth with smooth transition edges. A combination of multizone, multipass ablations are used to treat astigmatism. New algorithms effectively treat the full range of myopia, including low myopic eyes (-1 to -6 D), moderately myopic eyes (-6 to -10 D); and highly myopic eyes (-10 to -27 D).

대표청구항 ▼

[ I claim:] [1.] A method of performing photorefractive keratectomy with a surgical laser on a cornea of an eye to correct a refractive error of the cornea, the method comprising:performing a preoperative topographic analysis of the cornea of the eye;anesthetizing the eye;removing a corneal epitheli

[ I claim:] [1.] A method of performing photorefractive keratectomy with a surgical laser on a cornea of an eye to correct a refractive error of the cornea, the method comprising:performing a preoperative topographic analysis of the cornea of the eye;anesthetizing the eye;removing a corneal epithelium; andperforming corneal ablations of the cornea with the surgical laser using multiple passes in multiple zones, the corneal ablations being made from an inner zone to an outer zone of varying ablative depth, the width of each respective zone being varied to an irregular dimension with respect to other zones, each corneal ablation being titrated to the refractive error of the cornea based upon a predetermined algorithm, and the surgical laser being re-centered between each of the multiple passes.