Rheinische Friedrich-Wilhelms-Universität Bonn, University Eye Hospital, Bonn, Germany.
Fraunhofer IOSB, Ettlingen, Fraunhofer Institute for Optronics, Systems Technologies and Image Exploitation, Ettlingen, Germany.
J Vis. 2022 Sep 2;22(10):5. doi: 10.1167/jov.22.10.5.
Fixational eye movements are a hallmark of human gaze behavior, yet little is known about how they interact between fellow eyes. Here, we designed, built and validated a split-field binocular scanning laser ophthalmoscope to record high-resolution eye motion traces from both eyes of six observers during fixation in different binocular vergence conditions. In addition to microsaccades and drift, torsional eye motion could be extracted, with a spatial measurement error of less than 1 arcmin. Microsaccades were strongly coupled between fellow eyes under all conditions. No monocular microsaccade occurred and no significant delay between microsaccade onsets across fellow eyes could be detected. Cyclotorsion was also firmly coupled between both eyes, occurring typically in conjugacy, with gradual changes during drift and abrupt changes during saccades.
固视眼动是人类注视行为的一个显著特征，但对于它们在双眼之间如何相互作用，人们知之甚少。在这里，我们设计、构建和验证了一种分视场双目扫描激光检眼镜，以记录 6 名观察者在不同双眼会聚条件下固视时双眼的高分辨率眼动轨迹。除了微扫视和漂移外，还可以提取扭转眼动，其空间测量误差小于 1 角分。在所有条件下，微扫视在双眼之间都有很强的耦合。在同一只眼睛中没有发生单眼微扫视，也没有检测到微扫视起始时间在双眼之间的显著延迟。眼旋也在双眼之间牢固地耦合，通常是共轭的，在漂移过程中逐渐变化，在扫视过程中突然变化。
