PRK was the first Excimer laser procedure approved for use in the United States. In PRK, the surface of the cornea (epithelium) is scraped or ablated along with the corneal tissue underneath. This scrapping removes the microscopic layers of the cornea to correct refractive error. In contrast, LASIK reshapes the inner layers of the cornea to correct nearsightedness, farsightedness and astigmatism. In LASIK, a special instrument called the microkeratome gently folds back and lifts a thin layer of the cornea. Our laser will then precisely reshapes the inner surface of the cornea to enable light rays to focus more directly on the retina so images are in better focus. Today, LASIK is the most widely used refractive procedure performed in the United States. Most patients report a very high comfort level following the procedure and you will quickly notice improvements in visual acuity.