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. 2015 Mar 18;30(4):305–315. doi: 10.1007/s10654-015-0010-0

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© The Author(s) 2015

Open AccessThis article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.

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Fig. 3 — a Prevalence of myopia (SE ≤−0.75D) according to age, with 95 % confidence intervals (D diopters). b Prevalence of myopia (low myopia SE ≤−0.75 to >−3D, moderate myopia SE ≤−3 to >−6D, high myopia SE ≤−6D) according to age, with 95 % confidence intervals (D, diopters). c Prevalence of hyperopia (all hyperopia SE ≥1D, high hyperopia SE ≥3D), according to age, with 95 % confidence intervals (D diopters). d Prevalence of astigmatism (≥1D) according to age for males and females with 95 % confidence intervals (D diopters)