Effects of Ablation Diameter, Depth, and Edge Contour on the Outcome of Photorefractive Keratectomy

Abstract

Treatment with a 6.00-mm spherical ablation diameter produced less initial overcorrection, improved predictability, and was associated with a reduction in postoperative halos and night vision disturbances. Creating a superficial blend zone with a 5.00- to 6.00-mm multizone treatment had no beneficial effect on the outcome.