Prevalence and causes of blindness in an urban area of Paraguay.

Abstract

PURPOSE To determine the prevalence and causes of blindness in Piribebuy, Paraguay. METHODS A population based study was conducted from September to November 2007 in Piribebuy, Paraguay. Based on the city map, seven clusters were randomly selected, containing 22 to 36 squares (423 to 578 houses) each, where all subjects > 40 years old who agreed to… (More)

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