Corneal Collagen Crosslinking (CXL) is a treatment for patients with keratoconus and those who experience a keratoconus like condition after laser refractive surgery (so called post-LASIK corneal ectasia). This procedure strengthens the bonds between collagen lamellae, which represent the main structural component of the cornea. CXL is done as an office procedure under topical anesthesia with numbing eye drops. The procedure is performed either epithelium “on” or epithelium"off". Riboflavin eye drops are administered and the cornea is exposed to UVA light. After the procedure a bandage contact lens may be applied and kept in place for several days until the corneal epithelium is healed. The goal of treatment is to strengthen the cornea to prevent disease progression.