Results: Among 3.188 screened students, 716 students were diagnosed with refractive errors, the overall rate was 22.5%, of which myopia accounted for the highest rate of 66.5%, followed by astigmatism 32.8% and the lowest hyperopia 0.7%; Refractive errors were mild 63%, moderate 28.9%, severe 4.6% and very severe 3.5%.