Not only does it hinder aesthetics and affect vision, but congenital amblyopia can also cause serious amblyopia. In order to overcome visual impairment, patients often tighten the frontalis muscle to improve the position of the upper eyelid margin. Causes the forehead skin to wrinkle horizontally, the forehead lines to deepen, and the eyebrows to stand tall. People who droop on both sides often form a special posture of raising their heads and wrinkling their foreheads because they need to look up. Blepharoptosis can be divided into three degrees: mild refers to the affected side of the upper eyelid moving down below 2mm, or the upper eyelid covering the pupil1/3; Moderate means that the upper eyelid on the affected side moves down about 3mm, or the upper eyelid covers the pupil1/2; Severe refers to the affected side of the upper eyelid moving down more than 4mm, or the upper eyelid covering the pupil 1/2 or more. Correction of ptosis refers to the surgical correction of levator palpebrae superioris and its innervated nerves, so as to restore the function of levator palpebrae superioris and correct ptosis.