When Austrian doctor Peter was watching his son sleep, Austrian doctor Peter suddenly found his son's eyes rolling. He was surprised and quickly woke up his son, who said he was dreaming just now. He was surprised and quickly woke up his son, who said he was dreaming just now. Peter thought, will eye movements have something to do with dreaming? Peter thought, will eye movements have something to do with dreaming? Therefore, he regards his son as an "experiment: experiment": whenever his son sleeps, he stays by. He stayed by while the child was sleeping. Therefore, he regarded his son as an experiment. Whenever my son sleeps, he wakes up with a wink. His son always said that he had a dream. Once you find your eyes rolling, wake up your son. He always says he had a dream. Peter carefully observed his wife, Peter carefully observed his wife, then observed his neighbors, then observed his neighbors, observed his patients, and observed his patients, and found the same situation. Therefore, he wrote a paper, pointing out that people rolled their eyes while sleeping and found the same situation. So he wrote a paper, pointing out that people roll their eyes when they sleep, which means that people who sleep are dreaming. It means that the sleeping person is dreaming.