PRK

PRK, or photorefractive keratectomy, was the first FDA-approved surgical procedure developed to reshape the cornea using a laser.

Like LASIK, PRK uses a laser beam to reshape or correct the shape of the eye. The major difference between LASIK and PRK is which part of the cornea is treated.

With LASIK, a flap is created in the top layer, folded back for the reshaping of the underlying tissue, and put back into position at the end of the procedure. This flap serves as a natural bandage for the cornea.

With PRK, the laser reshapes the cornea after removing the surface layer of tissue, called the epithelium. A corneal flap is not created.

After reshaping the corneal tissue, the epithelium heals through the natural healing process. With PRK no corneal flap is created, so the surgeon usually places a bandage contact lens on the eye to reduce discomfort. This lens is usually removed on the second or third post-operative day. Generally, there is more discomfort with PRK than with LASIK, although this typically only lasts a few days.

Whether you should have PRK or LASIK is based on your individual diagnosis, and you should consult your doctor to determine the procedure best suited for you.