Posterior corneal topographic changes after retreatment LASIK

Abstract

Purpose: To evaluate posterior corneal topographic changes after retreatment after myopic laser in situ keratomileusis (repeat LASIK). Design: Retrospective nonrandomized comparative self-controlled trial. Participants: Thirty-three eyes of 23 patients who underwent repeat LASIK for residual myopia. Intervention: Retreatments were performed. Slit-scanning corneal topography was performed before and at 1, 3, and 6 months after repeat LASIK. Main Outcome Measures: Posterior corneal topographic changes before and after repeat LASIK were correlated with central corneal pachymetry (preoperatively, before repeat LASIK, after repeat LASIK), residual bed thickness (RBT) and ablation depth (after pri..