In epithelium-off CXL, the eye doctor will remove the first layer of the cornea, which is known as the epithelium. Removing the epithelium ensures that treatment is most effective. The epithelium removal process is painless and performed very quickly. When the epithelium has been fully removed, your eye doctor will apply liquid riboflavin drops to the eye. When the drops have been absorbed into your eye, they are then activated by using UV light. During the activation step, you will sit with the light in your eye for an extended period, which will be determined by your eye doctor. Next, a special kind of contact lens will be placed on your eye to help with healing.