Abd Manan F, Jenkins T C, Collinge A J
Department of Optometry, Faculty of Allied Health Sciences, University Kebangsaan Malaysia, Jalan Raja Muda Abd Aziz, 50300 Kuala Lumpur.
Malays J Med Sci. 2001 Jul;8(2):25-31.
We measured stereoacuity using TNO test on 25 patients without fixation disparity (FD) and compared the result with other 25 patients exhibited FD related to visual stress. All patients were presbyopes of ages ranging from 40 to 80 years, with visual acuity 6/6 or better in each eye, free from ocular diseases and generally healthy. The results showed statistically significant difference in the stereoacuities measured between the groups (Mann-Whitney U = 181.0, p < 0.01), suggesting that FD significantly reduced stereoacuity. Although the correlation between the magnitudes of FD and stereothreshold is statistically not significant (Spearman's r(s) = 0.33, p>0.01), elimination of FD using prisms correction statistically improved stereoacuity (Wilcoxon's Z = 2.43, p<0.01). The findings conclude that visual stress manifested as FD causes deficit in stereoperformance measurable with the TNO test and can be improved by prism correction.
我们使用TNO测试对25名无注视差异（FD）的患者进行了立体视锐度测量，并将结果与另外25名表现出与视觉压力相关的FD的患者进行了比较。所有患者均为年龄在40至80岁之间的老花眼患者，每只眼睛的视力为6/6或更好，无眼部疾病且总体健康。结果显示，两组之间测量的立体视锐度存在统计学上的显著差异（曼-惠特尼U = 181.0，p < 0.01），表明FD显著降低了立体视锐度。尽管FD的大小与立体视阈值之间的相关性在统计学上不显著（斯皮尔曼r(s) = 0.33，p>0.01），但使用棱镜矫正消除FD在统计学上改善了立体视锐度（威尔科克森Z = 2.43，p<0.01）。研究结果得出结论，表现为FD的视觉压力会导致TNO测试可测量的立体视功能缺陷，并且可以通过棱镜矫正得到改善。
