If the child is around four years of age, a vision of 4.8 is normal. If the child is older than five to six years of age or more, a vision of 4.8 is below the normal level and is not normal. The level of vision in children is related to the age of the child. If a small child is around four years old, a vision of 4.8 is within the normal range. A child’s visual acuity of 4.8 is equivalent to a visual acuity of 0.6 on the decimal recording method of visual acuity. If the child is five to six years old or older, 4.8 vision is below normal and may be abnormal. If a child over the age of five to six has a visual acuity of only 4.8, parents need to take their child for further optometric treatment so that the child’s refractive error can be clarified. If the optometry test determines that the child has problems such as farsightedness or nearsightedness, the child will need glasses to correct the refractive error and improve his or her vision. In addition, cataracts and glaucoma can also cause vision loss. It is recommended that children with vision abnormalities seek prompt medical attention to evaluate their condition and follow the doctor’s instructions for treatment.