A 7 year old child with 4.8 vision is not necessarily nearsighted, but may have farsightedness or astigmatism, and may be caused by eye diseases, such as amblyopia and retinopathy. The normal visual acuity of a 7-year-old child is usually 5.0 or above, and 4.8 belongs to vision loss.The common causes of vision loss in 7-year-old children are refractive errors, i.e. nearsightedness, farsightedness and astigmatism, but we can’t rule out diseases, such as amblyopia, hereditary fundopathy or retinopathy. Therefore, a 7-year-old child with a visual acuity of 4.8 is not necessarily myopic, and all of the above causes can lead to a 7-year-old child with a visual acuity of 4.8. Parents can take their 7-year-old child to the ophthalmology department of a regular hospital for consultation. If the child is diagnosed with myopia, he/she can wear glasses to correct his/her vision. Usually, we should pay attention to avoid the child’s long time eye use leads to excessive fatigue, at the same time, do eye exercises on time, is conducive to preventing the degree of myopia aggravation. When a 7-year-old child’s visual acuity is measured at 4.8, he or she should further cooperate with the doctor to find out the cause of the vision loss and then take appropriate measures to prevent the vision from continuing to decline.