Wavefront-guided vs. Topography-guided LASIK

Inclusion criteria. * Subjects ages 22 to 59with healthy eyes. Nearsightedness between -1.00 diopters and -9.00 diopters. * Subjects with less than or equal to 3.00 diopters of astigmatism. Exclusion criteria. * Subjects under the age of 22 and over the age of 59 * Subjects with excessively thin corneas. * Subjects with topographic evidence of keratoconus. * Subjects with ectactic eye disorders. * Subjects with autoimmune diseases. * Subjects who are pregnant or nursing. * Subjects must have similar levels of nearsightedness in each eye. They cannot be more than 1.5 diopter of difference between eyes. * Subjects with more than 3.00 diopters of astigmatism * Subjects must have similar levels of astigmatism in each eye. They cannot have more than 1.00 diopters of difference between eyes.