Abstract
For well over a century, ophthalmologists have searched for a surgical method to permanently correct refractive errors. Recently, the use of an argon fluoride excimer laser (193 nm) to reshape the cornea—photorefractive keratectomy (PRK) —has received world-wide interest as a more accurate surgical method to permanently correct myopic refractive errors Despite its high precision in removing tissue (a fraction of a micron of corneal tissue with each laser pulse), the permanent damage made by the excimer laser to the Bowman’s layer and underlaying stroma evokes a wound healing response that causes undesirable postoperative fluctuations in vision and a slow regression in the patient's correction, A procedure that will change the curvature of the corneal without violating the critical underlying structure of the eye is obviously the ultimate goal for refractive surgery.
© 1992 Optical Society of America
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