When viewing dichoptic stimuli in long time duration, visual percepts are always the alternation between the left and right eye inputs, while not the combination. This is known as binocular rivalry. An efficient coding theory reported that binocular visual inputs can be combined into binocular summation (S₊) and difference (S₋) channels in V1 brain area. In this study, we used specially designed stimuli as the previous study, in which monocular inputs caused ambiguous percepts, but S₊ and S₋ channels had unambiguous percepts. We aim to investigate whether the visual percepts alter between S₊ and S₋ channels in long time duration and whether vergence eye movements are involved in the process. To do so, the stimuli were presented in 300-s time duration in a trial, and a binocular eye tracker was used to record eye information. Participants’ real-time behavioral responses about the visual percepts and binocular information were recorded simultaneously. The results show there are perceptual flips between S₊ and S₋ channels in both central and long time viewing conditions. More importantly, in central vision there are vergence eye movements before perceptual flips, suggesting the involvement of high level visual attention; the time of a perceptual flip from S₊ is shorter than that of a flip from S₋, which might be due to different involvements of visual attention, indicating a bias of feedback connection from higher brain areas for visual attention to S₊ channel. Since S₊ and S₋ dominated signals can be carried by different types of binocular neurons, our results provide new insights into high level visual attention and binocular neurons in V1 brain area by using specially designed dichoptic stimuli and eye vergence as measuring tools.

中文翻译：

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散瞳眼动在长时间识别中的作用

当长时间观察两肢刺激时，视觉感知总是左眼和右眼输入之间的交替，而不是两者的结合。这被称为双目竞争。一种有效的编码理论报道，双眼视觉输入可以被组合成双眼总和（S ₊）和差（S _- ）在V1的脑区的通道。在这项研究中，我们使用了专门设计的刺激作为以往的研究中，其中单眼输入引起歧义知觉，但小号₊和S _-渠道有明确的知觉。我们的目标是研究视觉知觉是否符合S之间改变₊和S _-持续时间较长的通道，以及该过程是否涉及发散眼睛的运动。为此，在试验中以300秒的持续时间显示刺激，并使用双眼眼动仪记录眼信息。同时记录参与者关于视觉感受和双眼信息的实时行为反应。结果表明有S之间感知翻转₊和S _-在中央和长时间观看条件通道。更重要的是，在中央视觉中，在感知性翻转之前眼球会出现发散现象，这表明需要高度的视觉注意力。选自S感知翻转的时间₊比选自S倒装短_-，这可能是由于视觉注意力的不同参与所致，表明来自较高大脑区域的视觉反馈对S ₊通道的反馈连接存在偏差。配备S ₊和S _-主导的信号可以通过不同类型的神经元双眼的进行，我们的结果通过使用专门设计的dichoptic刺激和眼睛的辐辏作为测量工具提供新的见解在V1脑区高层次视觉注意力和双眼神经元。