Objective and pupillometric investigation of visual perception during interocular competition

本研究的目的是研究在眼球间竞争中，瞳孔反应是否与视觉感知相关，并探索瞳孔测量法作为评估眼球间相互作用的客观方法的有效性。研究结果可以总结如下。(1)通过利用双眼竞争，物理上相同的刺激序列可以产生不同的知觉变化。这项研究表明，当使用这种技术产生不同的亮度变化(亮度增加和减少)和颜色变化时，瞳孔反应表现出与知觉相关的变化。(2)用知觉测量和斜视测量评估眼间抑制的效果具有可比性。由眼间抑制引起的阈值升高和反应延迟在两种方法中都非常相似。这些发现有力地表明，瞳孔反应可以作为一种有用的非侵入性客观测量来研究眼与眼之间的相互作用。

The objectives of this study were to investigate whether the pupillary response exhibits changes correlated with visual perception during interocular competition and to explore usefulness of the pupillometry as an objective method to assess interocular interaction. The findings can be summarized as follows. (1) By taking advantage of interocular competition, different perceptual changes can be produced with a physically identical stimulus sequence. This study demonstrated that when different brightness changes (brightness increment and decrement) and color changes were produced using this technique, the pupillary response exhibited percept-related changes. (2) Effects of interocular suppression were comparable when assessed with perceptual and pupillometric measures. Both threshold elevation and response delay caused by interocular suppression were very similar between the two measures. These findings strongly suggest that the pupillary response can be a useful noninvasive objective measure for investigating interocular interaction.