Assessment of the effects of induced anisometropia on binocularity with glasses-free 3D technique  

作　　者：Xu-Bo Yang Wei-Dong Huang Yong-Chuan Liao 

机构地区：[1]Department of Ophthalmology,West China Hospital,Sichuan University,Chengdu 610041,Sichuan Province,China [2]Department of Optometry and Visual Science,West China School of Medicine,Sichuan University,Chengdu 610041,Sichuan Province,China

出　　处：《International Journal of Ophthalmology(English edition)》2023年第4期601-607,共7页国际眼科杂志（英文版）

基　　金：Supported by Sichuan Science and Technology Program (No.23NSFSC0856)。

摘　　要：AIM:To assess the effect of experimentally induced anisometropia on binocularity in normal adults with glassesfree three-dimensional(3D)technique.METHODS:Totally 54 healthy medical students with normal binocularity in the cross-sectional study were enrolled.Anisometropia was induced by placing trail lenses over the right eye,in 0.5 D steps including lenses of-0.5,-1,-1.5,-2,-2.5 D(hyperopic anisometropia)and lenses of+0.5,+1,+1.5,+2,+2.5 D(myopic anisometropia).The glasses-free 3D technique was used to evaluated not only fine stereopsis,but also coarse stereopsis,dynamic stereopsis,foveal suppression,and peripheral suppression in these subjects.One-way analysis of variance was used to compare quantitative data such as fine stereopsis,coarse stereopsis.Pearson’s Chi-square test was performed to compare categorical data such as dynamic stereopsis,foveal suppression and peripheral suppression.RESULTS:The subjects showed a statistically significant decline in fine stereopsis,coarse stereopsis,and dynamic stereopsis with increasing levels of anisometropia(P<0.001).Binocularity was af fected when induced anisometropia was more than 1 D(P<0.05).Foveal suppression and peripheral suppression were evident and increased in proportion to anisometropia(P<0.001).CONCLUSION:The relatively low degrees of anisometropia may have a potentially significant effect on high-grade binocular interaction.The mechanisms underlying the defect of binocularity seem to involve not only foveal suppression,but also peripheral suppression.

关 键 词：ANISOMETROPIA binocularity STEREOPSIS glasses-free 3D technique 

分 类 号：R77[医药卫生—眼科]