When the eyes stop to focus it is called a fixation and the movements between these fixations are called saccades . See image below
当眼睛停留集中在某点是我们称它为固视，当在若干固视点间移动时我们把它称做扫视。
Our eyes are constantly in motion. Even during visual fixation, small eye movements continually jitter the location of gaze.
我们的眼睛处于不断运动中。即使在凝视时，在所凝视的位置眼球仍不断进行细小的震动。
Our eyes are constantly in motion. Even during visual fixation, small eye movements continually jitter the location of gaze.
我们的眼睛处于不断运动中。即使在凝视时，在所凝视的位置眼球仍不断进行细小的震动。
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