Eyeballs move when you fall asleep, and it exists in practically everyone. To understand the nature of sleep, the nature of sleep is that the brain wave activity of the brain is constantly changing, and the eyeballs are located in different cycles of sleep, and will also constantly move. In fact, human sleep is divided into non-rapid eye movement sleep cycle and rapid eye movement sleep cycle, so when a person sleeps, the eyeballs actually move, indicating that it is a normal process of sleep. Some people may have eye movements that are not necessarily regular, or they may wake up easily, which may be indicative of abnormal brain waves. People like this do not fall asleep easily, and may have poorer sleep quality, and should undergo relevant examinations to determine what the cause of insomnia is.