1. STATISTICS

2. iLASIK – January 2014 to Present

3. PRK – January 2014 to Present

4. iLASIK UCVA at 3 months

5. iLASIK UCVA at 12 months

6. PRK UCVA at 3 months

7. PRK UCVA at 12 months

8. Global Comparison (iLASIK, 3 months post-op) Results ParameterUserReferenceRed/Green = Significantly worse/better outcomeSignificance UDVA mean ± SD in LogMAR+0.01 ± 0.09+0.02 ± 0.14U-test p=0.8411 UDVA ≥ 20/2082 %70.79 %Chi2 p=0.0019 CDVA gain of ≥ 1 Line13.57 %12.43 %Chi2 p=0.7041 CDVA loss of ≥ 1 Line2.71 %18.08 %Chi2 p<0.0001 SE mean ± SD in D (aim=emmetropia)-0.19 ± 0.38-0.16 ± 0.42U-test p=0.1328 SE within 0.5D of emmetropia86.27 %85.39 %Chi2 p=0.7734 SE within 1.0D of emmetropia96.95 %96.63 %Chi2 p=0.835 CYL mean ± SD in D (absolute)+0.17 ± 0.24+0.26 ± 0.29U-test p=0.0009 CYL ≤ 0.5D94.84 %89.33 %Chi2 p=0.0123

9. Global Comparison (iLASIK, 3 months post-op) For the year 2013, prior to obtaining the iDesign. ParameterUserReferenceRed/Green = Significantly worse/better outcomeSignificance UDVA mean ± SD in LogMAR+0.01 ± 0.1+0.00 ± 0.14U-test p<0.0001 UDVA ≥ 20/2082.89 %82.81 %Chi2 p=0.9596 CDVA gain of ≥ 1 Line19.03 %18.17 %Chi2 p=0.597 CDVA loss of ≥ 1 Line5.78 %7.47 %Chi2 p=0.1196 SE mean ± SD in D (aim=emmetropia)-0.06 ± 0.39-0.02 ± 0.41U-test p=0.1642 SE within 0.5D of emmetropia89.38 %88.01 %Chi2 p=0.3102 SE within 1.0D of emmetropia98.15 %97.46 %Chi2 p=0.284 CYL mean ± SD in D (absolute)+0.26 ± 0.31+0.24 ± 0.29U-test p=0.2076 CYL ≤ 0.5D88.55 %90.17 %Chi2 p=0.198

10. Post-op Assessment Forms These forms serve two purposes They allow us to answer any questions about healing, post- op drop regimes, enhancement suitability, etc. They help us track our statistics, which in turn enables us to make any adjustments necessary for future patients and provide the best possible results to our mutual patients

11. Retreatment Rates Higher retreatment rates for high myopes (above -6.00) More likely to get undercorrection or regression High myopes are educated that their risk of retreatment is higher than average Since 2006, the overall retreatment rate is 5.28% In 2014 iLASIK retreatment rate was 2.29% PRK retreatment rate was 1.13% (smaller sample size)

12. RETREATMENTS

13. RETREATMENTS/ENHANCEMENTS Should be PATIENT DRIVEN! Keep it positive Don’t worry about “the numbers” Consider all factors including the ocular surface!

14. RETREATMENT OPTIONS: Relift Post LASIK Repeat PRK PRK on the LASIK flap Poor RSB Time since original LASIK Surgery

15. Retreatment Protocol Post LASIK: Typically 6m (ensuring STABILITY) Relift within 2 years (can vary with surgeon) Post PRK: AT LEAST 6m post Sx (usually between 6-12m) Stable refraction PRK over PRK

16. HORIZON LASER VISION CENTER Retreatment Policy: N/C within 2 years of original surgery 2-5 years: $500 per eye 2014 Overall RTMT rate 2% Consistent between LASIK and PRK