The prevalence of amblyopia in the US is about 2% to 3%.[5][8][9][10] Boys and girls are affected equally. In a multi-ethnic paediatric eye disease study from Los Angeles County, the prevalence of amblyopia varied with ethnicity, with a prevalence of 1.5% among African-American children and 2.6% among Hispanic or Latino children.[5] A population study of inner-city Baltimore youth found a prevalence of 3.9%.[8]

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