Pay attention to prevent eye trauma, to eat more food rich in vitamin A, D such as animal liver, fish, honey and eggs, etc., carotenoids and lycopene are the prerequisite for vitamin A, so, eat more carrots and tomatoes on the eyes is also good. In addition, eye care should also be appropriate calcium, in fact, vitamin D intake can increase the body’s absorption of calcium. Always remember not to be partial to picky eating. At the same time, pay attention to early prevention of this congenital disease. Mainly: 1, premarital examination The first line of defense to prevent the birth of congenital malformations. Most congenital malformations are generally untreatable once they are born, so preventing the birth of affected children is very important. People are no strangers to premarital checkups, which are a comprehensive and systematic health checkup that mainly consists of a comprehensive physical examination, genetic health counseling, and an explanation of general knowledge about sexual life after marriage. Genetic counseling and genetic examination are important elements. The purpose of premarital genetic counseling is to find out whether both parties have a history of genetic diseases and other diseases that may be hereditary, in order to decide whether the man and woman are suitable for marriage. For example, if one or both parties are demented or have a mental illness that has not yet been cured, the chances of it being passed on to the next generation are very high. Although some patients with certain diseases have a normal appearance, they can have miscarriages, stillbirths, deformities, deafness or birth other physiological defects, and other diseases such as certain cardiovascular diseases such as high blood pressure and heart disease, diabetes mellitus, and certain inherited cancers may be inherited, and if there is a family member with a similar disease as the ones mentioned above, the possibility of the offspring suffering from this disease will be higher. If there are similar disorders in the family, then there is a higher likelihood that the offspring will suffer from such disorders. Counseling also provides both men and women with valuable knowledge about pre-conception and pregnancy care. For example, if you are too old, you are at a much higher risk of being born with congenital mental retardation and other malformations; you should not drink alcohol, smoke, get tired, or use medication before pregnancy; and during pregnancy, you should avoid catching colds, direct sunlight, high temperatures, and stay away from chemical hazards, and so on. 2, prenatal diagnosis The last line of defense to prevent the birth of children with congenital diseases. ultrasound is a painless and non-invasive method, the most widely used, it can detect the external development of the fetus’s face, limbs, spine and other external development, but also directly on the fetal heart and fetal movement dynamic observation, but ultrasound should not be done too much, because ultrasound will more or less affect the hearing of the fetus and other functions, generally under normal circumstances to the early pregnancy, the middle and late three times B ultrasound is appropriate, Generally, under normal circumstances, three times of ultrasound in early, middle and late pregnancy is appropriate. Chromosome examination is a kind of genetic diagnosis, mainly for fetal congenital chromosomal diseases, can diagnose more than 100 kinds of chromosomal diseases, including congenital stupidity, cat-call syndrome, amphoteric deformity, etc., which is ultrasound can not do.