Fig. 1From: Prevalence and risk factors of refractive error in Qinghai, China: a cross-sectional study in Han and Tibetan adults in Xining and surrounding areasSE indifferent age groups in Tibetan and Han (a); Prevalence of RE in different age groups in Han and Tibetan (b) and Distribution of RE in different age groups in Han and Tibetan (c), *** p < 0.001Back to article page