Congenital cataract is a partial or total clouding of the crystal that occurs in the first year of life, and it is one of the major causes of blindness and amblyopia in children. The group prevalence of congenital cataract in China is 0.05%, which is the second cause of blindness among children. Therefore, early prevention and treatment of congenital cataract is an important measure for eugenics and blindness prevention and treatment. The cause of congenital cataract is unknown, among which genetic factors account for about 25%. Environmental factors are another important cause, including maternal malnutrition or metabolic disorders during pregnancy, radiation exposure, alcohol abuse and viral infection in early pregnancy can cause lens clouding. Another common cause of congenital cataracts is impaired fetal development in the last trimester, so early prevention during maternal pregnancy is extremely important to prevent the development of congenital cataracts. If the clouded lens is partially or completely clouded, it should be surgically removed as early as possible to prevent amblyopia from forming, and an IOL should be implanted after the age of 2 and amblyopia training should be conducted after surgery. How can parents detect congenital cataracts in their babies as early as possible? If you find white reflections in the pupil, or if your baby is still unable to look at a near target at 2 months of age, or even if your eye cannot follow the target in front of you, you should bring your baby to the ophthalmology department as soon as possible so that you can save your baby’s eyesight with surgery.