摘要
目的探讨准分子激光角膜原位磨镶术（LASIK）中应用虹膜识别技术测量因瞳孔直径变化和体位改变引起的瞳孔中心移位和眼球旋转。方法术前通过Zywave波阵面像差仪和术中Technolas217z准分子激光机中虹膜识别软件测量81眼的瞳孔中心移位距离和眼球旋转角度。结果瞳孔直径由4．5—5．5mm散大至6．0—7．5mm，瞳孔中心水平方向（X轴）移位（55．81±56．25）μm、范围为0～244μm，垂直方向（Y轴）移位（74．01±53．75）μm，范围为5—246μm，矢量方向移位（99．65±67．32）μm，范围为12—260μm，眼球旋转1．15°±0．98°、范围为0—4．34°。体位改变引起的瞳孔中心水平方向（X轴）移位（59．23±51．38）μm、范围为0～244μm，垂直方向（Y轴）移位（73．12±56．08）μm、范围为1—250μm，矢量方向移位（100．04±64．68）μm、范围为13—265μm，眼球旋转3．81°±2．75°、范围为0—9．9。，其中27只眼（33．33％）的眼球旋转超过5°。右眼和左眼因瞳孔直径和体位改变引起的瞳孔中心移位和眼球旋转角度之间差异均无统计学差异。结论瞳孔直径变化和体位改变均可以导致瞳孔中心移位和眼球旋转，应用虹膜识别技术可以准确测量和校正移位距离和旋转度数。
Objective To analyze the pupil centroid shift and ocular cyclotorsion caused by pupil diameter changing and body position changing in LASIK. Methods Zywave wavefront aberrometer was performed preoperatively and the iris recognition software of the Technolas 217z excimer laser was performed in- traoperatively on 81 eyes to measure the distance of the pupil centrid shift and the degrees of ocular cy clotorsion caused by the change of pupil diameter and body position. Results The pupil diameter changed from 4.5 -5.5mm to 6.0-7.5mm. In the horizontal direction（X axis） the distance of pupil centroid shift was （55.81 ~56.25） I^m, the range was （0 -244） Ixm. In the vertical direction （Y axis）the distance was （74.01±53.75）μm, the range was （5 -246） μm. In the direction of vector the distance was（99.65 ± 67.32）μm , the range was（ 12 -260）μm. The degrees of ocular cyclotorsion was 1.15°±0.98μm, the range was 0°±4.34°. In the horizontal direction（ X axis）, the distance of pupil centroid shift caused by body position changing was（59.23 ±51.38） μm. The range was（0-244） μm. In the vertical direction （ axis） the distance was （73.12 ±56.08 ）±m. The range was （1 ± 250） μm. In the direction of vector the dis- tance was （ 100.04 ± 64.68 ） μm. The range was （ 13± 265 ） μm. The degree of ocular cyclotorsion was 3.81 °± 2.75°, the range was 0 ° ±9.9 °. The degree of cycloduction of 27eyes （33.33 % ） was over 5°. There was no statistically significant difference between the distance of the pupil centroid shift and the degrees of ocular cyclotorsion in both the right eyes and the left eyes caused by pupil diameter changing and body posi- tion changing. Conclusions Pupil diameter changing and body position changing can cause the pupil cen- troid shift and ocular cyclotorsion preoperatively and intraoperatively. The technology of iris recognition can be used to measure and regulate the displacement distance and the ocular cyclotorsion degrees exactly.
出处
《中华眼外伤职业眼病杂志》
2012年第6期427-430,共4页
Chinese Journal of Ocular Trauma and Occupational Eye Disease
关键词
角膜磨镶术
激光原位
虹膜识别
瞳孔移位
眼球旋转
Keratomileusis , laser in situ
Iris registration
Pupil displacement
Ocular cyclotorsion
