Assessing the accuracy of Orbscan II post‐LASIK: apparent keratectasia is paradoxically associated with anterior chamber depth reduction in successful procedures

Abstract

Using the Orbscan II device, the forward protrusion of the posterior corneal surface appears to coincide with a paradoxical reduction in depth of the anterior chamber. Although the keratectasia found in this study is accompanied by thin postoperative corneas and larger central pachymetry change, the contradictory decrease in anterior chamber depth creates uncertainty of measurement, and of ectasia as a mechanism of regression.