Oguchi Y, Mashima Y
Department of Ophthalmology, School of Medicine, Keio University, Tokyo, Japan.
Acta Ophthalmol (Copenh). 1989 Apr;67(2):127-30. doi: 10.1111/j.1755-3768.1989.tb00740.x.
Static random-dot stereograms were employed to evaluate the unequal input between two eyes, both objectively by VEP and psychophysically. In subjects with normal binocular function, different levels of artificial aniseikonia (from 2% to 15%) were established by placing several levels of size lenses in front of one eye. Binocular summation in amplitude in the VEP was observed below 5% aniseikonia, and the binocular inhibition took place above 5% aniseikonia. Psychophysically, perception of stereopsis could be maintained between 3% and 5% aniseikonia, but disappeared above 5% aniseikonia. Electrophysiological findings of binocular interaction caused by aniseikonia corresponded to the psychophysical findings, and stereoscopic perception was obtained only in the case of binocular summation in the VEP. In the present study, the amount of tolerable aniseikonia in order to maintain stereopsis was considered to be below 5%.
使用静态随机点立体图通过视觉诱发电位（VEP）客观地以及通过心理物理学方法来评估两眼之间的不等输入。在双眼功能正常的受试者中，通过在一只眼前放置不同度数的大小透镜来建立不同程度的人工两眼像不等（从2%到15%）。在两眼像不等低于5%时观察到VEP中振幅的双眼总和，而在两眼像不等高于5%时出现双眼抑制。从心理物理学角度看，在两眼像不等为3%至5%时可以维持立体视觉感知，但在高于5%时消失。由两眼像不等引起的双眼相互作用的电生理结果与心理物理学结果相符，并且仅在VEP中出现双眼总和的情况下才能获得立体视觉感知。在本研究中，为维持立体视觉可耐受的两眼像不等量被认为低于5%。
