1. C. Lackerbauer MD, A. Wolf MD, A. Kollias, MD, A. Kampik, MD,
Evaluation of Cyclotorsional Tracking in Wavefront-Guided LASIK for Myopic and Hyperopic astigmatism
C.-A. Lackerbauer, MD
C. Lackerbauer MD, A. Wolf MD, A. Kollias, MD, A. Kampik, MD,
The authors have no financial interst in any products presented in this study

2. Introduction Prospective study, 3 months results:
Cyclotorsion during surgery is detectable in up to 97% of patients* during surgery
Prospective study, 3 months results:
Baseline examination: manifest refraction, VISX-Wavescan
Treatment: Visx Star 4IR®:6,5mm optical zone wavefront-guided LASIK
Microkeratome Amadeus II (SIS)
Main criteria: cyclotorsional detection and correction during Excimerlaser surgery with the Visx S4 IR platform
*Ciccio AE: J Refract Surg Nov-Dec;21(6):S772-4

3. Material and Method: Patients at Baseline
Overall:
35 eyes, 19 patients
Right eyes
47,1%
Myopic Astigmatism (MA)
30 eyes, 16 patients SE
-4,76 dpt (-1,25 dpt to -8,25 dpt)
Astigmatism
1,04 dpt (0,25 dpt to 4,25 dpt)
Hyperopic Astigmatism (HA)
5 eyes, 3 patients
-0,4 dpt (+1,0dpt to -1,25dpt)
1,8 dpt (0,5dpt to 3,0dpt)

4. Results: Cyclotorsional Correction
≥ 0°
= 0°
≥ 2°

5. Results: Cyclotorsional Correction
degree°
6.1°
patient
number
2.7°
Clockwise in degree
anti-clockwise in degree 0°

6. Conclusion
cyclotorsional-detection and -correction due to iris recognition (IR) is a reliable tool for refractive laser surgery in 94% (caucasian patients)
the maximum amount of cyclotorsional-correction in our study is 6,1° and is not as high as previously described (up to 17°)*
for wavefront-guided ablation profiles of eyes with astigmatism cyclotorsional-detection and -correction is necessary in 88%
*Ciccio AE: J Refract Surg Nov-Dec;21(6):S772-4