C. Lackerbauer MD, A. Wolf MD, A. Kollias, MD, A. Kampik, MD,

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Presentation transcript:

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

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. 2005 Nov-Dec;21(6):S772-4

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)

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

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

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. 2005 Nov-Dec;21(6):S772-4