Huang T, et al. - This research sought to determine if the use of donors predisposed by corneal collagen cross-linking (CXL) reduced myopic refractive errors for keratoconic eyes after penetrating keratoplasty (PK). A reduction could be achieved in the topographic readings after PK for the treatment of keratoconus through donors predisposed by CXL. This, in turn, could reduce myopic refractive errors and improve the visual acuity.