- Previous ocular condition (other than refractive error) in the eye(s) to be treated that may predispose the eye for future complications (herpes simplex/zoster, recurrent corneal erosion syndrome, corneal melt, corneal dystrophy, etc.) Pregnancy, intent to become pregnant, or lactation during study. Corneal pachymetry <350 microns at the thinnest point measured by Pentacam in the eye(s) to be treated.