
Scientific evidence does not support the hypothesis that thinner preoperative central corneas are an independent risk factor for postLASIK ectasia, said William B. Trattler, MD, director of cornea at the Center for Excellence in Eye Care, Miami. Eyes with a thin cornea (less than 500 µm) and normal topography are at no greater risk than those with thicker corneas of developing postoperative ectasia and may be biomechanically strong and similar to thicker corneas in their behavior, Dr. Trattler added.