No abstract available
MeSH terms
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Adolescent
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Adult
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Age Factors
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Astigmatism / epidemiology
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Canada
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Child
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Child, Preschool
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Health Surveys
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Humans
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Indians, North American
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Inuit
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Middle Aged
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Myopia / epidemiology
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Presbyopia / epidemiology
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Refractive Errors / epidemiology*