Journal of AAPOS : the official publication of the American Association for Pediatric Ophthalmology and Strabismus · 2026
Prevalence of refractive errors among high-altitude urban and rural Tibetan students (7-15 years of age) in Shigatse, China.
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Jiang Zhijian, Ji Huiying, Danzeng Baima, Quji Renzeng, Wang Yang, Dong Jianhong
Аннотация
PURPOSE: To investigate and compare the prevalence of refractive errors among students in urban and rural regions of Shigatse, a high-altitude region in China.
METHODS: A school-based, cross-sectional study enrolled Tibetan students 7-15 years of age attending urban (Shanghai Experimental School, Shigatse City) and rural (primary and secondary schools in Sakya County) schools. Uncorrected or presenting visual acuity with glasses, best-corrected visual acuity, and noncycloplegic refraction were compared in all participants.
RESULTS: Overall, 1,671 and 2,837 Tibetan students in the urban and rural groups, respectively, completed the screening tests. Myopia was the most common type of refractive error. The overall prevalences of myopia and high myopia were 71.21% and 19.76%, respectively, in the urban group compared with 48.04% and 8.85% in the rural group, showing a significant difference (P < 0.001). Uncorrected refractive errors overall were more frequent in the urban group than in the rural group (54.34% vs 44.48% [P < 0.001]), although urban myopic students were more likely to have glasses than rural myopic students (56.05% vs 24.00% [P < 0.001]). The proportions of students with refractive correction who had a component of uncorrected refractive error, despite wearing glasses, were 56.22% and 56.57% in the urban and rural groups, respectively (P = 0.916).
CONCLUSIONS: The prevalence of myopia was high among both urban and rural students in this high-altitude region, though it was higher in urban areas than in rural areas.
METHODS: A school-based, cross-sectional study enrolled Tibetan students 7-15 years of age attending urban (Shanghai Experimental School, Shigatse City) and rural (primary and secondary schools in Sakya County) schools. Uncorrected or presenting visual acuity with glasses, best-corrected visual acuity, and noncycloplegic refraction were compared in all participants.
RESULTS: Overall, 1,671 and 2,837 Tibetan students in the urban and rural groups, respectively, completed the screening tests. Myopia was the most common type of refractive error. The overall prevalences of myopia and high myopia were 71.21% and 19.76%, respectively, in the urban group compared with 48.04% and 8.85% in the rural group, showing a significant difference (P < 0.001). Uncorrected refractive errors overall were more frequent in the urban group than in the rural group (54.34% vs 44.48% [P < 0.001]), although urban myopic students were more likely to have glasses than rural myopic students (56.05% vs 24.00% [P < 0.001]). The proportions of students with refractive correction who had a component of uncorrected refractive error, despite wearing glasses, were 56.22% and 56.57% in the urban and rural groups, respectively (P = 0.916).
CONCLUSIONS: The prevalence of myopia was high among both urban and rural students in this high-altitude region, though it was higher in urban areas than in rural areas.