摘要
目的探讨在坐位及仰卧位人眼球镜度数及散光轴向的改变。设计前瞻性病例系列。研究对象拟行LASIK手术的近视患者52例(96眼),屈光度-2.50D～-10.00 D,散光-0.75D～-4.50 D。方法对所有患者用手持自动验光仪分别测量坐位及仰卧位时的球镜度数、柱镜度数及其轴向,并对坐位及仰卧位球镜度数、柱镜度数及散光轴向的改变进行统计学分析。主要指标球镜、柱镜度数及散光轴。结果仰卧位球镜度数(-5.31±3.43)D与坐位球镜度数(-5.27±3.24)D相比略增高,但差异无统计学意义(P=0.25)。散光度数坐位平均(-2.27±1.24)D,仰卧位平均(-2.35±1.19)D,差异无统计学意义(P=0.20)。眼球散光轴向改变在-16°～+18°之间,其中0°～2°者52.1%,6°～10°者5.2%,>10°者3.1%。散光轴向右眼在旋转方向上更倾向于逆时针旋转,而左眼更倾向于顺时针旋转。结论患者坐位及仰卧位眼球的球镜和柱镜度数无明显变化,但眼球旋转引起的散光轴向改变,可能是影响某些患者LASIK术后效果的主要原因之一。
Objective To investigate the spherical diopter and astigmatism change of humans at sitting and supine position. Design Prospective case series. Participants 96 eyes of 52 patients （spherical diopter from -2.50 D to -10.00 D, astigmatism diopter from -0.75 D to -4.50 D） were selected. Methods The subjects were examined with NIKON portable retinomax at sitting and supine position, respectively. Main Outcome Measures The spherical diopter, cylinder diopter and axis change were analyzed statistically. Resuits Spherical diopter at supine position （-5.31±3.43 D） was a little higher than that at sitting position （-5.27±3.24 D） statistically（P= 0.25）, and cylinder diopter at sitting position （-2.27±1.24 D） and at supine position （-2.35±1.19 D） was no statistically difference （P= 0.20）. The axis of astigmatism changed from -16° to ＋18°. Axis change was within 2°in 52.1% eyes, 6°-10° in 5.2% ,over 10° in 3.1%. The change of axis rotation tended to counter-clockwise in the right eye and clockwise in the left eye. Conclusions Eye rotation at sitting and supine position may cause the astigmatism axis change. It may be one of the main factors affecting the results of LASIK.
出处
《眼科》
CAS
2008年第5期311-312,共2页
Ophthalmology in China
关键词
屈光不正
体位
眼球旋转
散光轴
refractive error
body posture
eye rotation
astigmatism axis
