散光软镜的旋转性评估分析

目的 研究散光软镜配适中代表镜片稳定性的评估因素及这些因素之间的相关性.方法 非干预性、观察性研究.32名散光软镜配戴者,经角膜接触镜的常规验配前检查,给予双眼配戴一种低旋智动定位设计的频繁更换型散光软镜,20 min后进行稳定性的评估,评估因素包括戴镜视力、镜片定位、活动度、散光轴旋转方向、旋转度数、旋转稳定性、鼻侧旋转恢复速度和颞侧旋转恢复速度.随机选择一眼数据,采用SPSS 13.0软件,对配适评估因素之间进行Partial相关性分析.结果 散光软镜配戴者中,旋转方向为偏颞侧者占59%,所有配戴者的平均旋转度数为（10.56±7.77）°：鼻侧旋转恢复速度和整体评估之间呈负相关（r=-0.49,P=0.005）,镜片配适越松,旋转恢复速度越快：旋转度数与旋转方向之间存在正相关（r=0.48,P=0.006）,向颞侧旋转时的旋转度数少于向鼻侧旋转时的旋转度数：旋转度数与旋转稳定性之间呈正相关（r=0.45,P=0.010）,旋转度数越少,旋转稳定性越好.结论 目前国内临床应用较多的频繁更换型散光软镜相对容易向颞侧旋转,其整体配适以相对偏松为主,旋转程度偏大,临床验配中应该引起重视;散光软镜配戴者的配适评估因素之间存在一定的相关性,影响镜片稳定性的主要因素包括整体配适评估和旋转度数,提示在临床运用中应该更加重视散光软镜的整体配适评估结果和旋转程度等问题.

Analysis of rotation evaluation with toric soft contact lenses

Objective The purpose of this study was to analyze the results of factors related to lens stability, and the correlations among them. Methods It was a noninterventional,observational study. Thirty-two subjects were enrolled in this study. Both eyes wore Lo-Torque frequent replacement toric soft contact lenses. Stability evaluations were done after 20 minutes of wear, including visual acuity with the contact lens, lens positioning, activity, rotation direction,rotation degree, rotation stability, and nasal and temporal rotation recovery speed. One eye of each subject was randomly selected. The correlations between the parameters were evaluated with SPSS 13.0statistical analysis software. Results The percent of temporal rotation was 59%, with a mean degree of (10.56±7.77)°. There was a negative correlation between nasal rotation recovery speed and overall assessment (r=-0.49, P=0.005). For the looser lens, rotation recovery was faster from the nasal side.The degree of rotation was significantly correlated with rotation direction (r=0.48, P=0.006); the amount of rotation to the temporal side was less than to the nasal side. There was a positive correlation between rotation degree and orientation stability (r=0.45, P=0.010), the less the degree of rotation, the better the stability. Conclusion Frequent replacement toric soft lenses rotate easily to the temporal side in the clinic. Attention should be paid to loose fittings and temporal rotation. There are many factors that affect lens stability, including overall assessment and degree of rotation. This study suggests that more attention should be paid to the overall assessment of the degree of rotation when dispensing toric soft contact lenses in the clinic.