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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
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