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。
The length of a fixation is usually an indication of information processing or cognitive activities as this is when the brain interprets the visual information from the eyes.
注视时间的长短通常表明了大脑处理视觉信息的过程和认知行为的发生。
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