Levi D M, Pass A F, Manny R E
Br J Ophthalmol. 1982 Jan;66(1):57-63. doi: 10.1136/bjo.66.1.57.
Temporal modulation thresholds were determined for monocular viewing and for binocular viewing of stimuli presented in phase or in counterphase to each eye of observers with normal binocular vision and those lacking stereopsis. The results showed that in individuals with normal binocular vision sensitivity was much greater for in-phase than for counterphase stimulation at low temporal frequencies, but that this superiority declined at higher temporal frequencies. Averaged across frequencies, binocular sensitivity for in-phase stimulation was 40-50% higher than monocular sensitivity. In contrast, in the observers lacking stereopsis the ratios of binocular in-phase/monocular sensitivity averaged 1.02, and there were no significant differences in sensitivity to in-phase and counterphase stimulation. This failure of binocular integration at threshold does not result from differences in transmission time between the 2 eyes. However, while individuals lacking stereopsis showed an absence of binocular interaction for uniform-field flicker at threshold, they showed suprathreshold dichoptic temporal frequency masking which was similar to that found in normal persons.
为具有正常双眼视觉的观察者以及缺乏立体视觉的观察者的每只眼睛，测定了单眼观看和双眼观看同相或反相呈现刺激时的时间调制阈值。结果表明，在具有正常双眼视觉的个体中，在低时间频率下，同相刺激的敏感性比反相刺激高得多，但这种优势在较高时间频率下会下降。在所有频率上平均，同相刺激的双眼敏感性比单眼敏感性高40 - 50%。相比之下，在缺乏立体视觉的观察者中，双眼同相/单眼敏感性的比率平均为1.02，并且对同相和反相刺激的敏感性没有显著差异。阈值时双眼整合的这种失败并非源于两眼之间传输时间的差异。然而，虽然缺乏立体视觉的个体在阈值时对均匀场闪烁没有双眼相互作用，但他们表现出与正常人相似的超阈值双眼时间频率掩蔽。
