Seven-year-olds without farsightedness reserve are relatively more prone to myopia and need to protect their eyesight by reducing the use of electronic products and increasing outdoor activities. Normal infants and young children, due to the short eye axis, are born with hyperopia, which means that the hyperopia reserve can avoid myopia, usually with age, the eye gradually develops, and the hyperopia reserve will be slowly consumed. Usually seven-year-old children should have 50 to 100 degrees of farsightedness reserve, such as farsightedness reserve is consumed in advance, may be due to poor eye habits, the possibility of myopia will increase, need to maintain good eye habits. You can let your child reduce exposure to electronic products, rest their eyes in time after a period of eye use, and help their eyes relax by increasing outdoor activities. In addition, they should maintain good sitting posture and do eye exercises. In terms of diet, eat more fresh vegetables and fruits, such as carrots, spinach, blueberries and other foods that help protect vision. At the same time, you should take your child to have their eyesight checked regularly, and if they appear to be nearsighted, they can go to a medical institution for optometry.