STATISTICS

iLASIK – January 2014 to Present

PRK – January 2014 to Present

iLASIK UCVA at 3 months

iLASIK UCVA at 12 months

PRK UCVA at 3 months

PRK UCVA at 12 months

Global Comparison(iLASIK, 3 months post-op)

Results

Parameter User Reference Red/Green = Significantly worse/better outcome Significance

UDVA mean ± SD in LogMAR +0.01 ± 0.09 +0.02 ± 0.14 U-test p=0.8411

UDVA ≥ 20/20 82 % 70.79 % Chi2 p=0.0019

CDVA gain of ≥ 1 Line 13.57 % 12.43 % Chi2 p=0.7041

CDVA loss of ≥ 1 Line 2.71 % 18.08 % Chi2 p<0.0001

SE mean ± SD in D (aim=emmetropia) -0.19 ± 0.38 -0.16 ± 0.42 U-test p=0.1328

SE within 0.5D of emmetropia 86.27 % 85.39 % Chi2 p=0.7734

SE within 1.0D of emmetropia 96.95 % 96.63 % Chi2 p=0.835

CYL mean ± SD in D (absolute) +0.17 ± 0.24 +0.26 ± 0.29 U-test p=0.0009

CYL ≤ 0.5D 94.84 % 89.33 % Chi2 p=0.0123

Global Comparison(iLASIK, 3 months post-op)

For the year 2013, prior to obtaining the iDesign.

Parameter User Reference Red/Green = Significantly worse/better outcome Significance

UDVA mean ± SD in LogMAR +0.01 ± 0.1 +0.00 ± 0.14 U-test p<0.0001

UDVA ≥ 20/20 82.89 % 82.81 % Chi2 p=0.9596

CDVA gain of ≥ 1 Line 19.03 % 18.17 % Chi2 p=0.597

CDVA loss of ≥ 1 Line 5.78 % 7.47 % Chi2 p=0.1196

SE mean ± SD in D (aim=emmetropia) -0.06 ± 0.39 -0.02 ± 0.41 U-test p=0.1642

SE within 0.5D of emmetropia 89.38 % 88.01 % Chi2 p=0.3102

SE within 1.0D of emmetropia 98.15 % 97.46 % Chi2 p=0.284

CYL mean ± SD in D (absolute) +0.26 ± 0.31 +0.24 ± 0.29 U-test p=0.2076

CYL ≤ 0.5D 88.55 % 90.17 % Chi2 p=0.198

Post-op Assessment FormsThese 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

Retreatment RatesHigher retreatment rates for high myopes (above -

6.00)More likely to get undercorrection or regressionHigh 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)

RETREATMENTS

RETREATMENTS/ENHANCEMENTSShould be PATIENT DRIVEN!Keep it positiveDon’t worry about “the numbers”Consider all factors including the

ocular surface!

RETREATMENT OPTIONS:

Relift Post LASIKRepeat PRKPRK on the LASIK flap

Poor RSBTime since original LASIK Surgery

Retreatment ProtocolPost 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 refractionPRK over PRK

HORIZON LASER VISION CENTERRetreatment Policy:

N/C within 2 years of original surgery2-5 years: $500 per eye

2014Overall RTMT rate 2%Consistent between LASIK and PRK

QUESTIONS?

THANK YOU!