The percentage of myopia in primary students was 5.8%, with an upward trend along with grade from 2.9% in grade 1, increased to 8.3% in grade 5; markedly different in different regions and high rate of 10.5% was in Hai Phong, 6.5% in HCM city, a low rate of 0.9% in Kon Tum, 1.1% in Hoa Binh.