Refractive error study in children: sampling and measurement methods for a multi-country survey - 05/09/11
Abstract |
PURPOSE:
The Refractive Error Study in Children was designed to assess the prevalence of refractive error and vision impairment in children of different ethnic origins and cultural settings.
METHODS:
Population-based cross-sectional samples of children 5 to 15 years of age were obtained through cluster sampling. Presenting, uncorrected, and best-corrected visual acuity, along with refractive error under cycloplegia, were the main outcome measures. Amblyopia and other causes of uncorrectable vision impairment were determined.
RESULTS:
Study design and sample size calculations, survey enumeration and ophthalmic examination methods, quality assurance monitoring, and data analyses and statistical methods are described.
CONCLUSIONS:
The study design, sample size, and measurement methods ensure that the prevalence of age-specific and sex-specific refractive error can be estimated with reasonable accuracy in the target populations. With commonality of methods, a comparison of findings between studies in different ethic origins and cultural settings is possible.
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 | This study was supported by the World Health Organization under National Institutes of Health Contract N01-EY-2103, Bethesda, Maryland. |
Vol 129 - N° 4
P. 421-426 - avril 2000 Retour au numéro
- Refractive error study in children: results from Shunyi District, China
- Jialiang Zhao, Xiangjun Pan, Ruifang Sui, Sergio R. Munoz, Robert D. Sperduto, Leon B. Ellwein
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