After we compared the Unaided visual acuity and the Corrected visual acuity who were wearing eyeglasses, over second grade of elementary school in Chonju and Iksan, we could get conclusions like these. 1. The grades are getting higher, there are more who are wearing eyeglasses. 2. Unaided visual acuity becomes worse but and Corrected visual acuity becomes better according to older. 3. There are 23 eye, (17.8%) in boys and 38 eye, (19.2%) in girls who have below 0.6 of the Corrected visual acuity who have to change their eyeglasses. 4. If Unaided visual acuity is getting better, Corrected visual acuity is betre. 5. There were 4 boys (6.2%) and 9 girls (9%) is Anisometropia.