γγA large number of studies have proved that the trace element zinc is involved in the retinol metabolism of children’s eyes. When zinc is deficient, the rate of synthesis of retinol-binding plasma proteins decreases, and the amount of retinol entering the serum from the liver decreases, resulting in a decrease in the amount of retinol available to the retina, which directly affects visual function and makes children prone to refractive error, strabismus and amblyopia. Inadequate intake of vitamins and trace elements is a potential threat to children’s visual function if the family has a difficult life and a single diet. If the mother is deficient in vitamins and trace elements during pregnancy, it will also affect the normal growth and development of the fetal organ system, potentially leading to children born with poor vision.γγIn daily life, children who are too picky eaters and who are deficient in certain micronutrients can lead to myopia. For example, calcium and chromium deficiency can affect the normal physiological function of the eyeball wall, its toughness and formability change, stretching the eyeball and increasing the anterior and posterior diameters, leading to myopia and contributing to the deepening of myopia. In addition, if long-term sweet tooth, so that the increase in blood sugar, plasma osmolarity, will also make the eye crystal body and atrial water osmolarity rise, crystal body refraction increased; at the same time will consume a lot of vitamin B1, and vitamin B1 deficiency is also the cause of vision loss. Therefore, children should try to achieve comprehensive nutrition in their daily diet, without picky and partial eating.