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Fair/poor eyesight by gender and health status in England 2013 survey | Statista
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QuickStats: Percentage of Children Aged 6–17 Years Who Wear Glasses or Contact Lenses, by Sex and Age Group — National Health Interview Survey, 2016 | MMWR
Study Finds Most Americans Have Good Vision, But 14 Million Are Visually Impaired | National Institutes of Health (NIH)
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Share of adult population wearing eyeglasses by age group U.S. 2016 | Statista
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Blindness Statistics | American Foundation for the Blind
Does wearing glasses weaken your eyesight? - BBC Future
Solved Questions 2-3 You are given the following data: | Chegg.com
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Myopia - Wikipedia
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Myopia - Wikipedia
Japan: share of wearing glasses lenses by age and gender 2017 | Statista
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