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By 2018, the prevalence of normal VA decreased from 61.4% in those aged 6 years to 31.9% in those aged 15 years. The prevalence of reduced VA among children aged 6-15 years in Yuhua District has become more common with age, and there has been a marked increase in the prevalence of reduced VA from 2002 to 2018. The remarkable epidemic of reduced VA started 5 years earlier in 2018 than in 2002. Evidence from the present study suggests that interventions should be launched before the age of 9 years. The prevalence of reduced VA among chil
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