LASIK Using Contoura With Phorcides vs. iDesign

Inclusion Criteria: * Male and Females between the ages of 21 and 50 * Nearsightedness between -2.00 diopters and -8.00 diopters * Have similar levels of nearsightedness in each eye (1.5D of difference between eyes) * Less than or equal to 3.00 diopters of astigmatism * Have similar levels of astigmatism in each eye (0.75D of difference between eyes) * Total spherical equivalent (SE) of no more than -9.0 D * Tricare Prime or Tricare Select Beneficiary * Residing within 60 miles radius from Lackland AFB Exclusion Criteria: * Subjects with corneal abnormal findings including signs of keratoconus, keratoconus suspect, abnormal corneal topography, epithelial basement membrane disease, pellucid marginal degeneration, corneal degenerations, progressive and unstable myopia, irregular or unstable corneal mires on central keratometry images, and patients whose corneal thickness would cause anticipated treatment would violate the posterior 250 microns of corneal stroma from the corneal endothelium. * Subjects with any ocular disease such as advanced/uncontrolled glaucoma, severe dry eye, active eye infection or inflammation, recent herpes eye infection or problems resulting from past infection. * Subjects with active collagen vascular, connective tissue, autoimmune or immunodeficiency diseases * Pregnant or nursing females * Systemic disease likely to affect wound healing, such as diabetes and severe atopy * Taking the medication Isotretinoin (Accutane) or antimetabolites for any medical condition