A 4-year-old child’s vision of 4.8 is normal vision. You cannot determine whether a child is nearsighted based on his or her vision, and the patient will need to undergo an optometric examination to determine this. 4.8 is roughly equivalent to 0.6 visual acuity, the normal range of children’s vision standards for different age groups are not the same, 4-year-old children’s normal visual acuity in the 0.6 to 0.8 or so. However, it is not based on the child’s visual acuity, to determine whether the child can be myopic, the child can be optometric examination to determine whether the myopia. However, if you find that your child has a large difference in vision between the two eyes or still has 0.7 vision after the age of 5, it may be due to myopia, hyperopia, astigmatism and amblyopia, etc. Parents need to pay attention to this and take their children to the hospital for further diagnosis and treatment through dilated pupil optometry. Parents should pay attention to children’s eye hygiene, reasonable control of eye time, regular vision checkups and outdoor exercise, all of which are beneficial to the protection of children’s eyesight. It is recommended that children with vision loss should consult a doctor promptly to assess their condition and follow the doctor’s instructions for treatment.