当大多数睡眠者睡眠中快速转动眼球的时候，就是在做梦。称作睡眠中的快速眼动REM 。
Most dreams occur during the stage of sleep when slumberers start making rapid eye movements, called REM sleep.
通常情况下，医生在对病人进行激光眼科校正手术时使用视频摄像机来跟踪眼球的转动，以便使激光手术刀落在正确的地方。
Normally when patients undergo corrective laser eye surgery, surgeons use video cameras to track the position of the eye so that the surgical laser targets the right place on the cornea.
我们会通过转动眼球来刺激大脑的不同区域。
We move our eyeballs to stimulate different parts of the brain.
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