Safety Study of the VEGA UV-A System to Treat Keratoconus

Inclusion Criteria: * 12 years of age or older * Having a diagnosis of keratoconus * Presence of central or inferior steepening * Topography consistent with keratoconus * Presence of one or more slit lamp or retinoscopy findings associated with keratoconus * Contact lens wearers only:Removal of contact lenses for the required period of time * Signed written informed consent * Willingness and ability to comply with schedule for follow-up visits Exclusion Criteria: * For keratoconus, a history of previous corneal surgery or the insertion of Intacs in the eye to be treated * Corneal pachymetry ≤ 400 microns * Previous ocular condition that may predispose the eye for future complications or prevent the possibility of improved vision * A history of chemical injury or delayed epithelial healing in the eye(s) to be treated. * Pregnancy (including plan to become pregnant) or lactation during the course of the study * A known sensitivity to study medications * Nystagmus or any other condition that would prevent a steady gaze during the cross-linking treatment or other diagnostic tests * A condition that, in the investigator's opinion, would interfere with or prolong epithelial healing. * Presence or history of any other condition or finding that, in the investigator's opinion, makes the patient unsuitable as a candidate for cross-linking or study participation or may confound the outcome of the study.