Excimer laser photorefractive keratectomy for myopia: two-year follow up.

This study, comprising 60 eyes with a follow up of at least 2 years, was designed to evaluate the efficacy and safety of excimer laser photorefractive keratectomy (PRK) for myopia in Japanese people. Eyes were divided into three groups: low myopia group (-2.00 diopters (D) to -3.00 D), 11 eyes; medium myopia group (-3.10 D to -6.00 D), 28 eyes; and high myopia group (-6.10 D to -14.00 D), 21 eyes. In 60 eyes, uncorrected visual acuity improved and spectacle corrected visual acuity remained unchanged. At 2 years, 100%, 75%, and 52%, respectively, of the low, medium, and high myopia groups, were within +/- 1.00 D of the attempted correction. Twenty-two eyes (37%) developed corneal haze of grade 2 or more. These data show that in low or medium myopia the predictability is good. But we think we have to pay attention to the strong haze, which seems to have developed more frequently in Japanese people than in previous reports of PRK in Caucasians.