What foods can effectively prevent myopia?

Let's tell you what causes children to become nearsighted, and more importantly, what foods can effectively prevent myopia? First, urban children consume less lutein. In recent years, western nutritionists have finally uncovered this mystery through in-depth research. It turns out that the occurrence of myopia is closely related to the insufficient intake of a nutrient called lutein. Lutein belongs to "carotenoid", which is high in fresh green vegetables and citrus fruits. According to scientists' research, lutein plays an important role in protecting the "macula" in the retina. If lutein is lacking, it will easily cause macular degeneration and blurred vision. Second, eat more oranges to prevent vision deterioration. Rural children eat vegetables directly in the field every day, so lutein intake is very sufficient. However, urban children usually eat high-protein and nutritious food and rarely eat fresh green vegetables, so the intake of lutein is much less than that of rural children. This is the main reason for the huge difference in vision between urban and rural children. In view of this, nutritionists suggest eating more citrus fruits every day to prevent vision deterioration. I think from the above questions, we can know that eating more citrus fruits can help children prevent myopia, but for children, we should be careful not to eat too much citrus.