A Three-Phase Contralateral Comparison of Ray-Tracing Guided LASIK Versus Three Other Refractive Surgery Platforms to Correct Myopia or Myopia With Astigmatism

This purpose of this study is to compare a new form of LASIK called Ray Tracing Guided LASIK to 3 other forms of corneal refractive surgery: 1. KLEx (KeratoLenticule Extraction) using the Zeiss Visumax 800 Laser, 2. WFO LASIK (Wavefront Optimized LASIK) using the Alcon EX500 Laser, and 3. Topography Guided LASIK (Contoura LASIK) also using the Alcon EX500 Laser.

This is a prospective, randomized, simultaneous, contralateral eye study comparing visual outcomes for 4 different refractive technologies. This study will be conducted in 3 phases. Each phase will include at least 44 subjects undergoing refractive correction surgery for myopia or myopia with astigmatism. Each phase will compare Ray-Tracing LASIK to 1 of 3 other forms of corneal refractive surgery. The Phase 1 comparator will be KLEx (KeratoLenticule Extraction) using the Zeiss Visumax 800 Laser. The Phase 2 comparator will be WFO LASIK (Wavefront Optimized LASIK) using the Alcon EX500 Laser. The Phase 3 comparator will be Topography Guided LASIK (Contoura LASIK) also using the Alcon EX500 Laser. Patients will be selected from the Hoopes Vision patient population after a preliminary refractive evaluation has been completed. Patients who express an interest in the study will be consented. After informed consent has been obtained and the patient has completed a screening exam and met all study criteria they will be considered enrolled. For each Phase, randomization will ensure 50% of Right Eyes will receive Ray-Tracing LASIK and 50% of Right Eyes will receive the other comparator procedure. Subjects will be given postoperative care instructions and medications following standard of care practices. Subjects will return for a 1-day, 1-week, 1-month, 3-month, 6-month, and 12-month visit. Retreatments may only occur after all postoperative study visits have been completed and/or the subject has exited the study. At the preliminary screening visit, 1-month, 3-month, 6-month and 12-mont postoperative visits, patients will complete a Patient Participant Questionnaire.