A 9-year-old child with 0.8 vision is not necessarily nearsighted. It is not normal for a child to have a visual acuity of 0.8, but this condition is also not necessarily myopia. This is because in addition to myopia, there is also the possibility of hyperopia or astigmatism, which may also be due to other eye diseases, such as conjunctivitis and keratitis. These diseases can lead to a significant loss of vision and a lower index of visual acuity. If a 9-year-old child’s 0.8 visual acuity is due to myopia, symptoms such as dry, itchy and sore eyes may occur, and in severe cases, photophobia and double vision may also be caused. Parents are advised to take their children to the hospital as soon as possible for visual acuity testing, dilated optometry, funduscopic testing and other examinations, and then according to the doctor’s diagnosis for targeted treatment.