Chernyak Dimitri A
Visx, Inc., Santa Clara, California 95051, USA.
J Cataract Refract Surg. 2004 Mar;30(3):633-8. doi: 10.1016/j.jcrs.2003.08.022.
To quantify the cyclorotation occurring between wavefront measurement and laser refractive surgery.
LaserVue Eye Center Ophthalmic Clinic, Santa Rosa, California, USA.
The pupil camera of the Visx WaveScan wavefront device was used to obtain images of 51 eyes (26 patients) from 5 to 20 minutes before refractive laser surgery. Additionally, an infrared camera was mounted on the Visx Star S3 ActiveTrak excimer laser system to obtain another image immediately before the laser was fired. After surgery, the 2 sets of images were compared to determine the amount of cyclotorsion between the measurement and surgery.
Cyclorotation of individual eyes was as high as 9.5 degrees. The mean was approximately 2.0 degrees for each eye. Binocular excyclotorsion was the predominant trend, affecting 19 of 24 patients.
A low to moderate amount of cyclotorsion was observed in the transition from seated to supine position. Comparison of eye position at the time of measurement to eye position at the time of surgery can be used to adjust the laser ablation algorithm to compensate for this rotational displacement.
量化波前测量与激光屈光手术之间发生的眼球旋转。
美国加利福尼亚州圣罗莎市的LaserVue眼科中心眼科诊所。
使用Visx WaveScan波前设备的瞳孔相机在屈光性激光手术前5至20分钟获取51只眼睛（26名患者）的图像。此外，在Visx Star S3 ActiveTrak准分子激光系统上安装了一台红外相机，在激光发射前立即获取另一张图像。手术后，比较两组图像以确定测量与手术之间的眼球扭转量。
单眼的眼球旋转高达9.5度。每只眼睛的平均值约为2.0度。双眼外旋转是主要趋势，影响了24名患者中的19名。
在从坐姿到仰卧位的转变过程中观察到低至中度的眼球扭转。测量时的眼位与手术时的眼位比较可用于调整激光消融算法，以补偿这种旋转位移。
