The causes of newborns sleeping with their eyes open and closed include the following two main situations. The first is due to the newborn is not fully asleep, in the first sleep is often not particularly heavy sleep, it will appear eyes open and closed. When the newborn enters deep sleep, the eyes will no longer be open and closed, and parents can continue to observe the situation, which is very common. Secondly, it is caused by being in the REM sleep period, which is divided into light sleep period and deep sleep period. During the deep sleep period, rapid eye movement often occurs. If the newborn’s eyelids are not well developed, there will be an opening and closing of the eyelids of the eyes in response to eye rotation.