What happens when you sleep with your eyes slightly open?

When sleeping, the eyelids should be in a closed state to protect the cornea and conjunctiva from damage. If the eyelids open when sleeping, consider that the eyelid fissure is not closed completely due to abnormal muscles of the eyelids; if the symptoms of eyelid fissure are serious, it will cause conjunctiva and cornea dryness, showing conjunctival congestion, foreign body sensation, tingling, keratitis and other manifestations. The above health science knowledge is for reference only. The specific situation needs to be checked in a regular hospital and judged by a professional doctor. Do not diagnose or treat yourself.