Safety and Effectiveness of Wavefront-guided LASIK for the Correction of Mixed Astigmatism

Inclusion Criteria: * At least 18 years of age at the time of pre-operative exam * Best Spectacle Corrected Visual Acuity (BSCVA) of 20/20 or better * Demonstration of refractive stability * Anticipated post-operative stromal bed thickness of at lest 250 microns * Willing and capable of returning for follow-up examinations for the duration of the study Exclusion Criteria: * Women who are pregnant, breast-feeding, or intend to become pregnant over the course of the study * Concurrent use of topical or systemic medications that may impair healing * History of any medical conditions that could affect wound healing * History of prior intraocular or corneal surgery, active ophthalmic disease,or other ocular abnormality * Evidence of keratoconus, corneal irregularity, or abnormal topography in the operative eye(s) * Known sensitivity or inappropriate responsiveness to any of the medications used in the post-operative course