上睑下垂是指提上睑肌功能不全或丧失,以致上睑呈现部份或全部下垂的反常状态。上睑下垂可为单侧或双侧。病人为克服视物障碍,常紧缩额肌,皱额耸眉以提高上睑的位置,严重时必须仰头甚至用手指推或提起上睑才能视物。因此,上睑下垂不但有碍视物和美观,先天性者还可造成弱视,故病人常强烈要求手术。 Ptosis refers to the levator ani dysfunction or loss, resulting in the upper eyelid showed some or all of the sagging anomalous state. Blepharoptosis can be unilateral or bilateral. Patients to overcome the visual obstacles, often tightening the amount of muscle, wrinkles the amount of eyebrows to raise the position of the upper eyelid, must be serious when the head or even push or lift the upper eyelid to see things. Therefore, ptosis not only hinder the visual and aesthetic, congenital persons can also cause amblyopia, so patients often strongly require surgery.