Department of Ophthalmology & Visual Sciences, McGill University, Montreal, Quebec, Canada.
Exercise Nutrition and Metabolism Laboratory, The University of Auckland, Auckland, New Zealand.
Vision Res. 2022 Dec;201:108123. doi: 10.1016/j.visres.2022.108123. Epub 2022 Oct 1.
The input from the two eyes is combined in the brain. In this combination, the relative strength of the input from each eye is determined by the ocular dominance. Recent work has shown that this dominance can be temporarily shifted. Covering one eye with an eye patch for a few hours makes its contribution stronger. It has been proposed that this shift can be enhanced by exercise. Here, we test this hypothesis using a dichoptic surround suppression task, and with exercise performed according to American College of Sport Medicine guidelines. We measured detection thresholds for patches of sinusoidal grating shown to one eye. When an annular mask grating was shown simultaneously to the other eye, thresholds were elevated. The difference in the elevation found in each eye is our measure of relative eye dominance. We made these measurements before and after 120 min of monocular deprivation (with an eye patch). In the control condition, subjects rested during this time. For the exercise condition, 30 min of exercise were performed at the beginning of the patching period. This was followed by 90 min of rest. We find that patching results in a shift in ocular dominance that can be measured using dichoptic surround suppression. However, we find no effect of exercise on the magnitude of this shift. We further performed a meta-analysis on the four studies that have examined the effects of exercise on the dominance shift. Looking across these studies, we find no evidence for such an effect.
双眼的输入信息在大脑中进行整合。在这种整合中，来自每只眼睛的输入信息的相对强度由眼优势决定。最近的研究表明，这种优势可以暂时改变。用眼罩遮住一只眼睛几个小时会使它的贡献更强。有人提出，通过锻炼可以增强这种转变。在这里，我们使用双眼周边抑制任务并按照美国运动医学学院的指南进行锻炼来检验这一假设。我们测量了向一只眼睛呈现正弦光栅补丁时的检测阈值。当同时向另一只眼睛呈现环形掩模光栅时，阈值会升高。我们在每只眼睛中发现的升高差异是我们衡量相对眼优势的指标。我们在单侧剥夺（戴眼罩）前和 120 分钟后进行了这些测量。在对照条件下，受试者在此期间休息。在运动条件下，在开始遮盖期间进行 30 分钟的运动。然后休息 90 分钟。我们发现，遮盖会导致双眼周边抑制测量的眼优势发生变化。然而，我们没有发现运动对这种转变幅度的影响。我们进一步对四项研究进行了荟萃分析，这些研究都检查了运动对优势转变的影响。纵观这些研究，我们没有发现这种影响的证据。
