Xiao Xin, Liu Wei-Min, Ye Ying-Jia, Huang Jian-Zhong, Luo Wu-Qiang, Liu Hong-Ting, Lin Quan, Zhao Wu-Xiao, Lin En-Wei
*MPH †MSc ‡MBBS Visual Science and Optometry Center of Guangxi, People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, China (XX, W-ML, J-ZH, WQ-L, H-TL, QL, W-XZ, E-WL); and Wuhan Aier Ophthalmological Hospital, Wuhan, Hubei, China (Y-JY).
Optom Vis Sci. 2014 Apr;91(4):390-6. doi: 10.1097/OPX.0000000000000221.
To investigate the prevalence and type of high astigmatism among children aged 3 to 6 years in Guangxi, a relatively undeveloped province in western China, and to examine the correlation between astigmatism and visual acuity.
Children aged 3 to 6 years in Nanning, the capital of Guangxi Province, participated in a population-based survey using a cluster random sampling technique. Eye examinations included autorefraction, visual acuity measurements, and assessments of the external eye, anterior segment, media, and fundus. Data for the right eyes were analyzed.
Among the 2304 children examined, the overall prevalence of high astigmatism (≥1.25 diopters by noncycloplegic SureSight autorefraction) was 12.7% (95% confidence interval, 11.3 to 14.0%). The age-specific prevalences of high astigmatism in 3-, 4-, 5-, and 6-year-old children were 13.8, 13.2, 12.9, and 8.1%, respectively. The prevalence of high astigmatism did not vary with age or gender (p > 0.05). The majority of cases of high astigmatism were with-the-rule astigmatism (82.9%), followed by against-the-rule (12.6%) and oblique (4.5%) astigmatism. A linear correlation was found between astigmatism magnitude and visual acuity (logMAR acuity = 0.068 + 0.055 × astigmatism) in all participants. Multiple linear regression analysis further showed that the correlation of astigmatism with visual acuity was magnitude dependent (β = 0.240). When with-the-rule astigmatism was used as a reference group, against-the-rule astigmatism (β = 0.137) and oblique astigmatism (β = 0.154) were closely correlated with visual acuity.
High astigmatism was moderately prevalent among children aged 3 to 6 years in Guangxi Province. With-the-rule astigmatism was the dominant form of astigmatism. Magnitude- and orientation-dependent correlations of astigmatism with visual acuity were confirmed.
调查中国西部相对欠发达省份广西3至6岁儿童中高度散光的患病率及类型，并研究散光与视力之间的相关性。
采用整群随机抽样技术，对广西壮族自治区首府南宁市3至6岁儿童进行了一项基于人群的调查。眼部检查包括自动验光、视力测量以及对眼外部、眼前节、眼介质和眼底的评估。分析右眼数据。
在接受检查的2304名儿童中，高度散光（非散瞳SureSight自动验光≥1.25屈光度）的总体患病率为12.7%（95%置信区间为11.3%至14.0%）。3岁、4岁、5岁和6岁儿童的高度散光年龄别患病率分别为13.8%、13.2%、12.9%和8.1%。高度散光的患病率在年龄或性别上无差异（p>0.05）。大多数高度散光病例为顺规散光（82.9%），其次是逆规散光（12.6%）和斜轴散光（4.5%）。在所有参与者中，散光度数与视力之间存在线性相关性（logMAR视力=0.068 + 0.055×散光）。多元线性回归分析进一步表明，散光与视力的相关性取决于散光度数（β = 0.240）。以顺规散光作为参照组时，逆规散光（β = 0.137）和斜轴散光（β = 0.154）与视力密切相关。
广西3至6岁儿童中高度散光患病率中等。顺规散光是散光的主要形式。证实了散光与视力之间存在度数和轴向依赖性相关性。
