Refractive error and visual impairment in urban children in southern china.

By M. He, J. Zeng, Yizhi Liu, Jingjing Xu, G. Pokharel, L. Ellwein. Investigative Ophthalmology and Visual Science, 2004

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The epidemics of myopia: Aetiology and prevention (2017, positive): “The RESC studies provide one of the most consistent sets of data, but the oldest children examined were 15 years-old (Dandona et al., 2002b; Goh et al., 2005; He et al., 2004, 2007; Maul et al., 2000; Murthy et al., 2002; Naidoo et al., 2003; Pokharel et al., 2000; Zhao et al., 2000).”
Worldwide prevalence and risk factors for myopia (2011, neutral): “4% in the 15-year-olds.(33) In rural parts of northern China, the prevalence of myopia was almost nil in 5-year-olds and steadily increased to 36.”
How genetic is school myopia? (2005, methodology): “Ideally, data should be presented by year of age for periods of rapid development of myopia, as in the studies of the development of myopia in children using a common Refractive Error Study in Children protocol carried out in China (Zhao et al., 2000; He et al., 2004), Chile (Maul et al., 2000), Nep”