Prevalence of myopia in Sherpa and Tibetan children in Nepal
Prevalence of myopia in Sherpa and Tibetan children in Nepal
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DOI：
10.1097/00006324-199905000-00014
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发表时间：
1999-05-01
影响因子：
1.4
通讯作者：
Frith, MJ
中科院分区：
文献类型：
--
作者：
Garner, LF;Owens, H;Frith, MJ
背景生活在尼泊尔的藏族和夏尔巴儿童在西藏和尼泊尔北部地区有着共同的祖先，但很明显，这些人经历了截然不同的教育和环境条件。这项研究的目的是比较近视的患病率：儿童具有相似的遗传背景，但谁暴露在对比的环境。方法：对555名加德满都藏族儿童和270名尼泊尔索鲁昆布地区夏尔巴族儿童进行裸眼视力和屈光不正的测量。结果两组视力及近视患病率差异有统计学意义。92%的夏尔巴儿童Snellen视力≥ 20/22（0.89），藏族儿童Snellen视力≥ 70%。藏族儿童屈光不正范围为-6.50 ~+7.00D，夏尔巴儿童屈光不正范围为-1.00 ~+3.50D。夏尔巴儿童近视患病率为2.9%，而藏族儿童近视患病率为21.7%。结论.夏尔巴儿童近视的患病率很低，他们的农村生活方式似乎相对没有压力。藏族儿童近视患病率较高，学校教育较为严格。我们没有建立近视和学校教育类型或一般环境之间的因果关系，但我们确实证明了简单的农村生活方式至少是兼容的;几乎没有近视。
Background. Tibetan and Sherpa children living in Nepal share a Common ancestry in Tibet and areas to the north of Nepal, but it is evident that these people experience widely contrasting educational and environmental conditions. The purpose of this study was to compare the prevalence of myopia in: children with similar genetic backgrounds but who are exposed to contrasting environments. Methods, Unaided vision and refractive error was measured in 555 Tibetan children-in Kathmandu and 270 Sherpa children in the Solu Khumbu region of Nepal. Results. There were marked differences in vision and the prevalence of myopia in the two groups. Ninety-two percent of the Sherpa children had Snellen vision df 20/22 (0.89) or better compared with 70%: of the Tibetan children, The range of refractive errors was -6.50 to +7.00 D for the Tibetan children and -1.00 to +3.50 D for the Sherpa children. The Sherpa children had a prevalence of myopia of 2.9% compared with 21.7% for the Tibetan children. Conclusions. The prevalence of myopia in Sherpa children is low and their rural lifestyle appears to be relatively unstressed. Tibetan children have a higher prevalence of myopia and more rigorous schooling. We did not establish a causal relationship between myopia and the type of schooling, or the environment in general, but we did demonstrate that a simple, rural lifestyle is at least compatible;with a virtual absence of myopia.