Bidirectional associations between hyperopia, myopia, astigmatism, and strabismus, and attention-deficit/hyperactivity disorder in children: a national population-based cohort study.

5 There has been an increasing trend in the prevalence of myopia over the past half-century. 6 In Australian children aged 12 years, the prevalence of myopia was 8.6% among those of European descent and 52.5% among those of East Asian descent. 7 A Brazilian study found an overall myopia prevalence of 25.3%, 8 with rates in the 20% range for children aged 1 to 9 years and in the 30% range for children aged 10 to 19 years.

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