Corneal dry spots are dry corneal spots formed due to the accumulation of corneal epithelium and are mainly seen in vitamin A deficiency disease. This disorder is a systemic nutritional disorder with ocular manifestations of vitamin A deficiency. So how to avoid the disease in children? 1.Actively prevent and intervene in vitamin A deficiency in pregnant and nursing mothers. 2, emphasize breastfeeding infants, when breast milk is not enough, need to choose vitamin A fortified formula. 3, Regular consumption of animal foods rich in vitamin A, such as liver, as well as green leafy vegetables rich in carotenoids and orange or yellow fruits and vegetables. 4.In areas with a high prevalence of vitamin A deficiency, the Chinese Medical Association recommends prophylactic vitamin A supplementation. 5.When suffering from infectious diseases such as measles, malaria and tuberculosis, as well as chronic wasting diseases, take vitamin A supplementation early.