Corneal Collagen Crosslinking
Corneal Collagen Crosslinking (CXL) is a technique that uses ultraviolet (UV) light and a photosensitizer called riboflavin (liquid vitamin B2) to strengthen the cornea and attempt to reduce the progression of Keratoconus (KCN) or post-LASIK ectasia.
A healthy cornea retains its shape, while patients with keratoconus or ectasia have an irreversibly thin cornea that bulges outward, leading to impaired vision. Keratoconus is thought to be progressive, meaning there is a high chance it will continue to worsen with time. Crosslinking of collagen refers to the ability of collagen fibers forming strong bonds with other fibers. Collagen cross-linking occurs naturally with aging, which may be one reason why KCN progression is thought to slow with age.