There are several causes of ptosis: congenital ptosis and myofacial ptosis are common in children. In the former, the main symptom is that the upper eyelid cannot be lifted after birth, and the child often tightens the frontalis muscle – wrinkling the forehead and shrugging the shoulders – to help lift the lid and open the eyes. In addition, when the pupil is covered by the drooping eyelids, amblyopia of the affected eye is often the result. The latter is a gradual drooping of the upper eyelid for unknown reasons, which is light in the morning and heavy in the afternoon and worsens with fatigue and illness. The former requires surgery, while the latter is treated with a combination of medications. The timing of surgery for congenital ptosis in children: If the ptosis is severe, with the upper lid margin covering more than 1/2 of the pupil, surgery should be performed as early as possible to prevent amblyopia; if the ptosis is mild to moderate and does not affect the child’s normal visual development, surgery can be performed at 6-7 years of age before school.