Corneal mapping software enhances clinical evaluations with the output of highly accurate, full color corneal maps. The system offers an enlarged color map, tangential axial maps, sagittal maps, refractive and keratometric data, and peripheral keratometric maps. It provides early phase detection of subclinical keratoconus as well as pre and post-op evaluation. The software also features a image overlay function, as well as a multi-map and difference map view, which display multiple image maps for easy comparison.