1. Michael J. Endl, M.D. The author of this poster has no financial interest in the subject matter of this poster. Early Results of Static and Dynamic Iris Tracking for Moderate and High Astigmatism in LASIK Patients

2. Presented by Michael J. Endl MD Fichte-Endl, & Elmer Eye Associates ASCRS 2011

3. Early Results of Static and Dynamic Iris Tracking for Moderate and High Astigmatism in LASIK Patients Moderate to High Astigmatism n=265 126 eyes between 0.75 to 1.5 D Cylinder 139 eyes > 1.5 D Cylinder

4. Wavefront Guided and Standard Treatments Zyoptix = 190 eyes Planoscan= 75 eyes

5. Key-Values of Combined Data Sets Spherical Equivalent [Dpt]Wavefront & Standard Sphere [Dpt] Wavefront & Standard TimeEyesMeanMinMax Pre-op265-5.23-8.37-0.78 3 Months2650.03-0.750.75 TimeEyesMeanMinMax Pre-op265-5.23-8.37-0.78 3 Months2650.03-0.750.75

6. Cylinder Key Data Cylinder [Dpt] Wavefront & Standard, Moderate & High Astigmatism TimeEyesMeanMinMax Pre-op265-1.54-4.41-0.75 3 Months265-0.28-0.750

7. Moderate and High Astigmatism Key Data Sets TimeEyesMeanMinMax Pre-op1261.32-1.5-0.75 3 Months126-0.26-0.750 Wavefront & Standard, Moderate Astigmatism 0.75 – 1.5 D Cylinder Wavefront & Standard, High Astigmatism >1.5 D Cylinder TimeEyesMeanMinMax Pre-op139-2.21-4.41-1.53 3 Months139-0.31-0.500

8. Data Sets by Treatment Type Zyoptix Cylinder Values TimeEyesMeanMinMax Pre-op190-1.26-4.41-0.75 3 Months190-0.260.750 Planoscan Cylinder Values TimeEyesMeanMinMax Pre-op75-1.67-3.25-0.75 3 Months75-0.23-0.500

9. n=265 Combined Wavefront & Standard

10. n=265 Combined Wavefront & Standard

11. n=265

12. Wavefront & Standard

14. n-265 Wavefront & Standard

15. n=265 Wavefront & Standard

16. ** Remainder of eyes had between 0-5 degrees of dynamic rotation. Wavefront & Standard

17. Conclusions A significant degree of both static and rotational cyclotorsion occurs in eyes undergoing myopic refractive surgery. The newly FDA approved static and active tracking system on the Technolas 217z excimer provides safe and accurate outcomes for the treatment of both moderate and high amounts of refractive astigmatism, for both wavefront driven and standard excimer treatments.

18. The End