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

Early Results of Static and Dynamic Iris Tracking for Moderate and High Astigmatism in LASIK Patients

Presented by

Michael J. Endl MDFichte-Endl, & Elmer Eye AssociatesASCRS 2011

Early Results of Static and Dynamic Iris Tracking for

Moderate and High Astigmatism in LASIK

Patients

Moderate to High Astigmatismn=265

•126 eyes between 0.75 to 1.5 D Cylinder

•139 eyes > 1.5 D Cylinder

Wavefront Guided and Standard Treatments

Zyoptix = 190 eyes

Planoscan= 75 eyes

Key-Values of Combined Data SetsSpherical Equivalent [Dpt] Wavefront & Standard

Sphere [Dpt] Wavefront & Standard

Time Eyes Mean Min Max

Pre-op 265 -5.23 -8.37 -0.78

3 Months 265 0.03 -0.75 0.75

Time Eyes Mean Min Max

Pre-op 265 -5.23 -8.37 -0.78

3 Months 265 0.03 -0.75 0.75

Cylinder Key Data

Cylinder [Dpt] Wavefront & Standard, Moderate & High Astigmatism

Time Eyes Mean Min Max

Pre-op 265 -1.54 -4.41 -0.75

3 Months 265 -0.28 -0.75 0

Moderate and High Astigmatism Key Data Sets

Time Eyes Mean Min Max

Pre-op 126 1.32 -1.5 -0.75

3 Months 126 -0.26 -0.75 0

Wavefront & Standard, Moderate Astigmatism 0.75 – 1.5 D Cylinder

Wavefront & Standard, High Astigmatism >1.5 D Cylinder

Time Eyes Mean Min Max

Pre-op 139 -2.21 -4.41 -1.53

3 Months 139 -0.31 -0.50 0

Data Sets by Treatment Type

Zyoptix Cylinder ValuesTime Eyes Mean Min Max

Pre-op 190 -1.26 -4.41 -0.75

3 Months 190 -0.26 0.75 0

Planoscan Cylinder ValuesTime Eyes Mean Min Max

Pre-op 75 -1.67 -3.25 -0.75

3 Months 75 -0.23 -0.50 0

n=265

Combined Wavefront & Standard

n=265

Combined Wavefront & Standard

Combined Wavefront & Standard

n=265

Wavefront & Standard

Wavefront & Standard

89%

11%

Iris Recognition

IR Success

IR Failure

n-265

Wavefront & Standard

-10

-5

0

5

10

15

-8.4

11.3

Static Rotation Angle Min/Max

Static Angle Min/Max

Deg

rees

of

Sta

tic

Ro

tati

on

n=265

Wavefront & Standard

25; 86%

4; 14%

Significant Dynamic Rotation

> 5 Degrees Dynamic Ro-tation

>10 Degrees Dynamic Ro-tation

n=265

** Remainder of eyes had between 0-5 degrees of dynamic rotation.

Wavefront & Standard

ConclusionsA 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.

The End