U.S.A.
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Puerto Rico ~ Cuba ~ Dominican Republic
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Mexico ~ Guatemala ~ Honduras
Nicaragua ~ El Salvador ~ Costa Rica ~ Panama ~ Colombia ~ Ecuador ~ Peru
Venezuela ~ Bolivia ~ Chile ~ Paraguay ~ Brazil ~ Uruguay ~ Argentina
Nicaragua ~ El Salvador ~ Costa Rica ~ Panama ~ Colombia ~ Ecuador ~ Peru
Venezuela ~ Bolivia ~ Chile ~ Paraguay ~ Brazil ~ Uruguay ~ Argentina

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Click here for Risk Factors for Four-Year Incident Visual Impairment and Blindness (.pdf).