12-year-old vision 4.7, not reached the normal range, should be further medical examination to clarify the cause of vision loss, and then decide whether to wear glasses, if it is caused by myopia, usually need to wear glasses to correct. A 12-year-old child with a visual acuity of 4.7 may have blurred vision, eye fatigue and a series of other symptoms. If it is caused by true myopia, it needs to be corrected in time, and it is more common to wear glasses to correct it. While wearing the right glasses, you should also pay attention to the scientific use of the eyes, for example, avoid studying in places with strong light or too dim, and avoid excessive use of electronic products, so as to avoid further increase in myopia. At the age of 12 with a visual acuity of 4.7, it is recommended that parents take their children to the doctor for an examination to determine the cause of the vision loss, and then decide whether or not to wear glasses under the guidance of the doctor.