视敏度与固视性质检查的相关性

目的 探讨固视性质检查在客观评估视敏度方面的可行性.方法 应用MP-1微视野仪检查75例眼底损伤者的固视性质,将受检者分为中心固视组、不确定组、偏心固视组.分析三组间视敏度的差异,同时对视敏度与微视野视网膜平均光敏感度的相关性进行Pearson相关、回归分析.结果 （1）视敏度检测显示,中心固视组为4.80±0.16,不确定组为4.20±0.45,偏心固视组为3.40±0.57.单因素方差分析提示,三组间视力水平的差异具有统计学意义（P＜0.05）.（2）视敏度（y）与视网膜平均光敏感度（x）之间均存在线性关系：y=-18.76＋6.21x,Pearson相关系数为0.707（P＜0.05）.结论 视敏度与固视性质检查之间存在统计学意义上的正相关,固视性质检查具有客观预估视敏度区间的法医学价值.

Correlation between Visual Acuity and Fixation Characteristics

Objective To explore the feasibility of fixation characteristics to evaluate visual acuity. Meth-ods The fixation characteristics were examined in 75 subjects by MP-1 microperimeter. These subjectswere divided into 3 groups： central fixation group, uncertain group and eccentric fixation group, and thedifferences of visual acuity among them were analyzed. Pearson correlation and regression analysis wereperformed on visual acuity and average retinal light sensitivity. Results （1） The visual acuity was 4.80___0.16 for central fixation group; 4.20_＋0.45 for uncertain group; and 3.40_＋0.57 for eccentric fixation group,respectively. Based on the one-way ANOVA, the visual acuities in the three groups had statistically sig-nificant differences （P〈0.05）. （2） There was linear relationship between visual acuity （y） and averageretinal light sensitivity （x）. And the linear regression equations was y=-18.76＋6.21 x. The Pearson corre-lation coefficient was 0.707 （P〈0.05）. Conclusion There is significant positive correlation between visualacuity and fixation characteristics. Testing of fixation characteristics could be used to assess visual acuityobjectively, which has a practical value in forensic clinical medicine.