Bilateral corneal ectasia after laser in situ keratomileusis in patient with isolated difference in central corneal thickness between eyes.

A patient was treated bilaterally for myopia using laser in situ keratomileusis (LASIK). Preoperatively, there was no known risk factor for ectasia but a 20 microm between-eye difference in central mean corneal thickness was seen on the optical pachymetry map. Two years postoperatively, bilateral ectasia was diagnosed. This case suggests that abstention or surface ablation treatment may be a safer option than LASIK in patients showing central thickness asymmetry between eyes. (c) 2010 ASCRS and ESCRS. Published by Elsevier Inc. All rights reserved.