Kozawa Ryo, Bingushi Kazuo
Department of Psychology, Chukyo University, Yagotohonmachi, Showa-ku, Nagoya 466-8666, Japan.
Shinrigaku Kenkyu. 2013 Feb;83(6):536-45. doi: 10.4992/jjpsy.83.536.
To investigate binocular single vision, we examined monocular contrast sensitivity during binocular fixation by changing the intervals between the beginning of fixation and a probe stimulus, within 10 seconds. Monocular contrast sensitivities were quite stable within 1s of the interval delay in both eyes, but they were reduced in either eye if the interval delay was more than 1s (Experiment 1). In Experiment 2, a similar stimulus was monocularly presented. In this case, decline of contrast sensitivity was not observed in either eye. In Experiment 3, when the stimulus was interrupted briefly before the probe presentation, the contrast sensitivity was recovered. These results suggest that after prolonged viewing the binocular system does not sustain either eye sensitivity equally unless there is interruption of the binocular stimulation.
为了研究双眼单视，我们通过在10秒内改变注视开始与探测刺激之间的间隔，在双眼注视期间检查单眼对比敏感度。在两眼间隔延迟1秒内，单眼对比敏感度相当稳定，但如果间隔延迟超过1秒，任何一只眼睛的对比敏感度都会降低（实验1）。在实验2中，单眼呈现类似刺激。在这种情况下，两只眼睛均未观察到对比敏感度下降。在实验3中，当在探测刺激呈现之前短暂中断刺激时，对比敏感度恢复。这些结果表明，长时间注视后，除非双眼刺激中断，否则双眼系统不会同等地维持任何一只眼睛的敏感度。
