An advanced laser procedure combining ALK and PRK to reshape the central cornea, thereby decreasing or eliminating myopia (nearsighted, shortsighted vision), hyperopia (farsighted, longsighted vision), and astigmatism (irregular cornea). The refractive surgeon uses an automated microkeratome to shave off a thin, hinged layer of the cornea. This flap is then lifted like a hinged door and the exposed surface is reshaped using the excimer laser. After altering the corneal curvature, the flap is replaced and adheres without stitches. Lasik Details