Kohnen T, Kühne C, Cichocki M, Strenger A
Klinik für Augenheilkunde, Johann-Wolfgang-Goethe-Universität, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany.
Ophthalmologe. 2007 Jan;104(1):60-5. doi: 10.1007/s00347-006-1428-2.
Centration of the ablation zone decisively influences the result of wavefront-guided LASIK. Cyclorotation of the eye occurs as the patient changes from the sitting position during aberrometry to the supine position during laser surgery and may lead to induction of lower and higher order aberrations.
Twenty patients (40 eyes) underwent wavefront-guided LASIK (B&L 217z 100 excimer laser) with a static eyetracker driven by iris recognition (mean preoperative SE: -4.72+/-1.45 D; range: -1.63 to -7.00 D). The iris patterns of the patients' eyes were memorized during aberrometry and after flap creation.
The mean absolute value of the measured cyclorotation was -1.5+/-4.2 degrees (range: -11.0 to 6.9 degrees ). The mean cyclorotation was 3.5+/-2.7 masculine (range: 0.1 to 11.0 degrees ). In 65% of all eyes cyclorotation was >2 masculine.
A static eyetracker driven by iris recognition demonstrated that cyclorotation of up to 11 degrees may occur in myopic and myopic astigmatic eyes when changing from a sitting to a supine position. Use of static eyetrackers with iris recognition may provide a more precise positioning of the ablation profile as they detect and compensate cyclorotation.
消融区的中心定位对波前引导的准分子激光原位角膜磨镶术（LASIK）的结果有决定性影响。当患者从像差测量时的坐姿变为激光手术时的仰卧位时，眼球会发生旋转，这可能导致低阶和高阶像差的产生。
20例患者（40只眼）接受了由虹膜识别驱动的静态眼跟踪器引导的波前引导LASIK手术（B&L 217z 100准分子激光）（术前平均等效球镜度：-4.72±1.45 D；范围：-1.63至-7.00 D）。在像差测量期间和制作角膜瓣后记录患者眼睛的虹膜图案。
测量的旋转平均值的绝对值为-1.5±4.2度（范围：-11.0至6.9度）。平均旋转为3.5±2.7度（范围：0.1至11.0度）。在所有眼睛中，65%的旋转大于2度。
由虹膜识别驱动的静态眼跟踪器表明，近视和近视散光眼从坐姿变为仰卧位时可能发生高达11度的旋转。使用带有虹膜识别的静态眼跟踪器可以在检测和补偿旋转时更精确地定位消融轮廓。
Zotero 插件