In Vivo Confocal Microscopy After Photorefractive Keratectomy in Humans

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Abstract
EXCIMER LASER photorefractive keratectomy (PRK) to correct myopia up to 6.0 diopters (D) has proved to be an effective refractive procedure. Although every eye initially develops a subepithelial scar (visible as haze on slitlamp examination), this scarring usually does not substantially impair visual acuity. Accordingly, the incidence of loss of best-corrected visual acuity is very low.1,2 Clinically, the haze is confined to the very anterior stroma underlying the original ablation zone. Previous studies have shown that small ablation zones and higher corrections cause a denser haze and a higher rate of visual acuity loss.3-5