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    Prevalence of vision impairment and refractive error in school children in Ba Ria - Vung Tau province, Vietnam

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    Author
    Paudel, P; Ramson, P; Naduvilath, T; Wilson, D; Ha, TP; Ho, SM; Giap, NV
    Date
    2014-04-01
    Source Title
    Clinical and Experimental Ophthalmology
    Publisher
    WILEY-BLACKWELL
    University of Melbourne Author/s
    Paudel, Prakash
    Affiliation
    Academic Services and Registrar
    Metadata
    Show full item record
    Document Type
    Journal Article
    Citations
    Paudel, P., Ramson, P., Naduvilath, T., Wilson, D., Ha, T. P., Ho, S. M. & Giap, N. V. (2014). Prevalence of vision impairment and refractive error in school children in Ba Ria - Vung Tau province, Vietnam. CLINICAL AND EXPERIMENTAL OPHTHALMOLOGY, 42 (3), pp.217-226. https://doi.org/10.1111/ceo.12273.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/257352
    DOI
    10.1111/ceo.12273
    Abstract
    BACKGROUND: To assess the prevalence of vision impairment and refractive error in school children 12-15 years of age in Ba Ria - Vung Tau province, Vietnam. DESIGN: Prospective, cross-sectional study. PARTICIPANTS: 2238 secondary school children. METHODS: Subjects were selected based on stratified multistage cluster sampling of 13 secondary schools from urban, rural and semi-urban areas. The examination included visual acuity measurements, ocular motility evaluation, cycloplegic autorefraction, and examination of the external eye, anterior segment, media and fundus. MAIN OUTCOME MEASURES: Visual acuity and principal cause of vision impairment. RESULTS: The prevalence of uncorrected and presenting visual acuity ≤6/12 in the better eye were 19.4% (95% confidence interval, 12.5-26.3) and 12.2% (95% confidence interval, 8.8-15.6), respectively. Refractive error was the cause of vision impairment in 92.7%, amblyopia in 2.2%, cataract in 0.7%, retinal disorders in 0.4%, other causes in 1.5% and unexplained causes in the remaining 2.6%. The prevalence of vision impairment due to myopia in either eye (-0.50 diopter or greater) was 20.4% (95% confidence interval, 12.8-28.0), hyperopia (≥2.00 D) was 0.4% (95% confidence interval, 0.0-0.7) and emmetropia with astigmatism (≥0.75 D) was 0.7% (95% confidence interval, 0.2-1.2). Vision impairment due to myopia was associated with higher school grade and increased time spent reading and working on a computer. CONCLUSIONS: Uncorrected refractive error, particularly myopia, among secondary school children in Vietnam is a major public health problem. School-based eye health initiative such as refractive error screening is warranted to reduce vision impairment.

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