Ptosis

Sagging eyelids, also known as drooping eyelids, refers to the partial or complete loss of muscle function when lifting the upper eyelid, so that the upper eyelid cannot be lifted up partially or completely. When both eyes look straight ahead, the upper eyelid covers the upper edge of the cornea more than 2mm. The upper eyelid muscles include the upper eyelid muscle and Mler's muscle. The upper eyelid muscle is innervated by the oculomotor nerve, and the Mler's muscle is innervated by the cervical sympathetic nerve. When these two muscles are incomplete or lost, they will appear on the upper eyelid. Eyelids drooping. If the drooping of the upper eyelid is light, it may cover part of the pupil, and in severe cases, the entire pupil may be covered, which not only hinders the appearance but also affects vision. In severe cases, you must lift your head or even raise your upper eyelid with your fingers to view the object.