Eyelid insufficiency during sleep

The eyes of most people are closed when they are sleeping, and only a small number of people still have their eyes open while they are sleeping, as the saying goes, "eyes sleep". "Open eyes to sleep" is medically known as incomplete eyelid closure during sleep. Most people who "open their eyes to sleep" are ill, and may cause damage to their eyes over time. A small number of people are not ill and have no effect on eye health and daily life.