The main symptom is that the upper eyelid cannot be lifted, and the child often tightens the frontalis muscle – wrinkling the forehead and raising the eyebrows – to help lift the eyelid. When the ptosis exceeds the pupil, it can affect the visual development of the affected eye and cause amblyopia. Timing of surgery for congenital ptosis: 1. Surgery should be the main treatment for congenital ptosis. 2. In acquired ptosis, the cause is treated first, and surgery can be considered if the ptosis does not recover in six months to a year. For mild to moderate congenital ptosis, which does not affect vision, surgery is usually appropriate before school age (to remove factors that affect the child’s psychological development). In severe congenital ptosis, the upper eyelid margin covers more than 1/2 of the pupil, seriously hindering the development of vision and leading to amblyopia, which should be treated with early surgery, regardless of age. The purpose of surgery is to reduce the likelihood of form-blocking amblyopia during the sensitive period of vision development before the age of 3. The purpose of the surgery should be clearly explained to the parents before the surgery. If you have a child before the age of 3, you can consider frontalis suspension surgery, and after the age of 3, you can choose frontalis flap suspension, levator muscle shortening, levator muscle shortening combined with transverse ligament strengthening, and other types of surgery with better long-term results.