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K.A. Rose, T. Quoc Mai, E. Ojiami, S. Huynh, D. Robaei, E. Rochtchina, W. Smith, I. Morgan, P. Mitchell, Sydney Myopia Study; Distribution of Myopia in Australian School Children of Caucasian and East Asian Origin: The Sydney Myopia Study . Invest. Ophthalmol. Vis. Sci. 2005;46(13):4621.
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Purpose: The Sydney Myopia Study aims to document the prevalence of refractive error in Australian school children in Sydney. Here we report the prevalence of myopia in the cohort of 6–7 year olds. Methods: All Year 1 children attending 34 primary schools, selected using a stratified random cluster design based on socio–economic status, were invited to participate. A comprehensive eye examination including cycloplegic (cyclopentolate) autorefraction was performed. Parents completed a 193 item questionnaire on health and socio–demographic information. Results: Of the 1740 children with a mean age of 6.7 years who participated (78.9%), 1724 had autorefraction. The prevalence of myopia (≤ –0.5D in either eye) was 1.54% (95% CI 1.02–2.34). Mean spherical equivalent refraction in right eyes was +1.26D (SEM 0.03). In children whose parents identified themselves as European Caucasian (n=1109), the myopia prevalence was 0.80% (CI 0.47–1.37). In children with parents of East Asian origin (n=295, 17.1%) the myopia prevalence was 3.58% (CI 2.12–6.02), significantly higher than the Caucasian group. Conclusions: The low prevalence of myopia and the hyperopic mean spherical equivalent is consistent with older data on Caucasian children of this age1,2 but is lower than more recent data from the US3. Despite a combination of urban dwelling lifestyle, extensive preschool attendance and compulsory school education from the age of 4–5 for children in Sydney, the prevalence of myopia from the East Asian children is very much lower than that reported in Taiwan4, Hong Kong5 and Singapore6. 1. Sorsby et al. London: Her Majesty's Stationary Office, 1961. 2. Slataper FJ. Archives of Ophthalmology 1950;43:466–481. 3. Zadnik K. Optometry & Vision Science 1997;74(8):603–8. 4. Lin et al. Ann Acad Med Singapore 2004;33(1):27–33. 5. Fan et al. Invest Ophthalmol Vis Sci 2004;45(4):1071–5. 6. Saw et al. Ophthalmology 2002;109(11):2065–71.
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