Comparison of Standard vs. Accelerated Corneal Crosslinking

This clinical trial, titled "Comparison of Standard vs. Accelerated Corneal Crosslinking" (study ID: NCT03922542), is comparing two methods of performing corneal cross-linking (CXL) — a procedure used to halt the progression of keratoconus or corneal ectasia (a thinning and bulging of the cornea). The standard method delivers UV light over a longer period at lower intensity, while the accelerated method delivers a higher intensity for a shorter time. Both methods use riboflavin drops to sensitize the cornea. Researchers want to know if the faster approach is as effective and safe as the standard one. The study is open to patients aged 10 and older with documented keratoconus or corneal ectasia following refractive surgery, with adequate corneal thickness to safely perform the procedure. People with corneal conditions that could complicate healing or who are pregnant are excluded. You may be eligible if you: - Are 10 years of age or older - Have documented keratoconus or corneal ectasia after refractive surgery - Have sufficient corneal thickness to safely undergo cross-linking You may NOT be eligible if you: - Have insufficient corneal thickness - Have an ocular condition that predisposes your eye to complications - Have a history of chemical injury or problems with delayed corneal healing - Have a known sensitivity to treatment medications - Are pregnant or planning to become pregnant Talk to your doctor to see if this trial is right for you.