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

A Prospective Study to Evaluate the Safety and Effectiveness of Wavefront-Guided LASIK Correction of Mixed Astigmatic Refractive Errors With the iDESIGN Advanced Wavescan Studio™ System and STAR S4 IR™ Excimer Laser System

To demonstrate that wavefront-guided LASIK with measurements from iDesign is safe and effective in the treatment 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