Why do you sleep with your eyes closed?

Most people sleep when the eyes are completely closed, but there are a small number of people sleep when the eyes are not tightly closed. Sleeping eyes are not tightly closed, normal indications of eye lesions, such as eyelid nerve control is slightly poor, sleeping will show eye closure is not tight, then the eyes only exposed white eyes and not exposed black eyes, often the problem is not too big, there is no other clinical manifestations, do not need treatment. In addition, facial paralysis or hyperthyroidism convex eyes, or eye tumors and other diseases, can also lead to patients sleeping eyes closed loosely, then normal is the need for treatment.