The sponsor terminated the study prior to data analysis for financial reasons.

The purpose of this research study is to test the safety, tolerability, and effectiveness of corneal collagen cross-linking (CXL), when used 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.