How does the PRK procedure differ from LASIK?
In PRK the laser is used to reshape the surface. No flap is created. Just the surface epithelial cells are removed and the laser beam is applied. After, a bandage soft contact lens is inserted. This enhances healing of the cornea by protecting the epithelium (surface layer). As the epithelium heals the corneal surface begins to become smoother and vision becomes sharper. Because the surface must become smooth for vision to improve, the initial healing period for PRK is about 4 days which differs from the initial LASIK healing period which is 1 day.
