Microsaccades keep the eyes' balance during fixation
Microsaccades keep the eyes' balance during fixation
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DOI：
10.1111/j.0956-7976.2004.00697.x
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发表时间：
2004-06-01
影响因子：
8.2
通讯作者：
Kliegl, R
中科院分区：
文献类型：
--
作者：
Engbert, R;Kliegl, R
在固定目标的注视过程中，小的无意识眼球运动表现出不稳定的自主性-随机游走。这些注视性眼球运动的两种类型是漂移和微扫视（小幅度扫视）。我们研究了固定眼球运动和双目协调，以前曾被应用于人体姿势控制的统计分析。这种随机行走分析揭示了两种不同的时间尺度的注视眼球运动，并确定了微扫视的具体功能。在短时间尺度上，微扫视通过增加注视错误来增强感知。在较长的时间尺度上，微扫视减少固定错误和双眼视差（相对于纯漂移运动）。因此，我们的研究结果澄清了眼突在固定过程中的作用。
During fixation of a stationary target, small involuntary eye movements exhibit an erratic trajectory-a random walk. Two types of these fixational eye movements are drift and microsaccades (small-amplitude saccades). We investigated fixational eye movements and binocular coordination using a statistical analysis that had previously been applied to human posture control. This random-walk analysis uncovered two different time scales in fixational eye movements and identified specific functions for microsaccades. On a short time scale, microsaccades enhanced perception by increasing fixation errors. On a long time scale, microsaccades reduced fixation errors and binocular disparity (relative to pure drift movements). Thus, our findings clarify the role of oculomotor processes during fixation.