Sleeping with closed eyes may be caused by the following reasons: 1. Physiological rabbit eyes, which are more common and have a gap between the upper and lower eyelids when sleeping, but the patient will not develop exposure keratitis and will not have any uncomfortable symptoms, and generally does not need special treatment; 2. Exposure keratitis, caused by eye trauma, acid and alkali chemical injuries, cranial hemorrhage, and diseases of the skull and brain that cause incomplete eyelid closure, can trigger exposure Therefore, erythromycin eye ointment or oxyfluoxacin eye ointment needs to be given to the eyes while sleeping to keep the eyes moist and avoid the occurrence of exposure keratitis. Therefore, it is important to visit a regular eye care provider to determine the cause and treat it accordingly.