The eyes are continuously fluctuating even during fixation. The fluctuations are called miniature eye movements and consist of microsaccades, drifts, and tremors. It has been revealed that these miniature eye movements aid our vision. Although the functional roles of the miniature eye movements have gradually been uncovered, their generation mechanism remains a mystery. Here, we focus on the microsaccade, and review the related neuronal circuit, and generation mechanisms from the viewpoint of neurophysiology and computational neuroscience.
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