Excimer Laser Photorefractive Keratectomy for Myopia: Comparison of 4.00- and 5.00-Millimeter Ablation Zones

Abstract

Despite greater depths of stromal ablation with 5.00-millimeter diameters, there was no increased anterior stromal haze or postoperative regression of refraction. The biological and physical constraints governing the optimum size of the photorefractive keratectomy ablation zone are discussed.