Congenital cataracts are congenital genetic or developmental disorders that exist before and after birth or develop gradually after birth. Congenital cataract is a common eye disease that seriously affects the vision development of infants and children, and is an important cause of blindness and amblyopia in children. About 10%-38.8% of infant and child blindness in China is related to congenital cataracts, accounting for the second cause of blindness. Therefore, for the sake of children’s health, parents should popularize and raise awareness of congenital cataract prevention. How to detect congenital cataract in children at an early stage? Parents should pay attention to the following aspects: 1. In a normal baby, the cornea and lens of both eyes are transparent, and the pupils on both sides are equally large and round, and they are sensitive to light. If parents find that their child’s pupil area becomes white or gray and lusterless, they should be alert to the presence of congenital cataracts and go to a regular hospital for early examination. Pay attention to the child’s eye movements from time to time. Normal children have the ability to follow the activities of both eyes with their own control. Parents can hold a toy in front of the child, if the child’s eyes do not follow the activity or the eyes do not turn in a coordinated manner, the child should be examined by an ophthalmologist. Third, pay attention to whether the child has compensatory head position In general, the child often uses the eye with better vision when seeing things, and causes the head to deviate to the side with good vision when looking at things, using one eye to see things, called compensatory head position. If this is the case, you should go to the hospital for examination. IV. Medical history Etiological studies of congenital cataracts show that genetic factors account for 30% to 50%. Therefore, parents should pay attention to whether any of their relatives have congenital cataracts. In addition, mothers who have had viral infections such as chickenpox, herpes, shingles, measles or influenza during the first 3 months of pregnancy should pay special attention to whether their child has congenital cataracts. Further, extra attention should be paid if the child was born prematurely or has a history of intrauterine hypoxia.