摘要
目的:探讨游标高敏视力预测玻璃体混浊视功能的临床应用价值。方法:采用自行研究设计的游标高敏视力检查系统软件,对14例（14眼）玻璃体混浊患者手术前进行游标高敏视力检查,受检者判断计算机显示屏上活动光标与固定光标的相对位置关系,按要求移动轨迹球调整这些光标之间的位置关系,通过计算分析活动光标和固定光标位置之偏差,得出平均阈值及其变异度;将检查值与术后视力结果进行对比、统计、分析。结果:手术前、后游标视力阈值配对t检验,差异无显著性（t=0.52,P=0.612）,其相关系数为0.85（P<0.01）;手术前、后游标视力阈值变异度配对t检验,差异也无显著性（t=0.431,P=0.674）,其相关系数为0.97（P<0.01）。术前游标视力阈值与术后视力的相关系数为-0.74（P <0.01）;术前游标高敏视力阈值变异度与术后视力的相关系数为-0.95（P<0.01）。根据术前游标视力阈值及变异度建立的术后视力线性回归预测方程为:Y=0.943-0.000116THv-0.00193SDv,预测方程的复相关系数为0.95。结论:游标高敏视力在玻璃体混浊手术前后具有很好的一致性,能抵抗混浊玻璃体的干扰,是术前预测玻璃体混浊视功能的敏感指标之一。
Purpose: To evaluate the clinical value of visual function with vitreous opacity patients preoperatively.Methods: The vernier acuity examining soft wear system was developed to detect the 14 cases (14 eyes) with vitreous opacity patients preoperatively. Two fixed targets and a movable target are shown on the computer screen. The examine was asked to adjust the position of the central target and the relationship between it and align them by using a track-ball. The computer automatically recorded the deviations of distances between the movable target and the specific one, and computed the average threshold of hyperacuity and its variance. Then the hyperacuity result and postoperative visual acuity were compared.Results: Paired t-test showed that the difference between peroperative and postoperative vernier acuity thresholds was not significant (t = 0. 52, P = 0. 612). The coefficient of correlation was 0. 85 ( P < 0. 01). Neither was the threshold variance (t = 0. 431, P = 0. 674) . The correlation coefficient was 0. 97( P < 0. 01) . The correlation coefficient between preoperative hyperacuity threshold and postoperative visual acuity was - 0. 74 ( P < 0. 01), and that between preoperative threshold variance and postoperative visual acuity was - 0. 95 ( P < 0. 01). Based on the preoperative vernier acuity threshold and its variance, the function of linear regression was Y = 0. 943-0. 000116THv -0. 00193SDv.Conclusions: Vernier acuity remains good consistency after vitrectomy, and it is one of the sensitive parameter in predicting the postoperative visual function for vitreous opacities.
出处
《眼科学报》
2002年第2期92-94,共3页
Eye Science
关键词
高敏视力
玻璃体混浊
视功能
hyperacuity, vitreous opacity, visual function
