Sleeping with eyes open is generally abnormal, clinically can be divided into physiological and pathological. 1. Physiological refers to some patients sleep with eyes closed, but there is still a small gap, this situation is generally not a big problem, will not cause eye damage, need to be regularly reviewed, pay attention to eye care, do not stay up late, and can be appropriate to wear an eye mask to sleep. 2. Pathological see facial neuritis, facial paralysis, as well as diseases around the eyes, scars, etc., can cause the eyes can not be closed. If the gap is too big it will expose the conjunctiva or cornea, causing exposure conjunctivitis and exposure keratitis, which will cause different degrees of damage to the eyes. This condition needs to be treated aggressively to avoid eye damage. If you have any symptoms of discomfort, you should go to the hospital in a timely manner, under the guidance of a physician, to identify the cause and then give targeted treatment.