Refractive error and ocular alignment in school-aged children from low-income areas of São Paulo, Brazil.

Background: Uncorrected refractive errors and amblyopia are reported as the two main causes of childhood visual impairment and blindness worldwide. Our purpose was to evaluate refractive status, ocular alignment and effective refractive error coverage (eREC) of school-aged children from low-income areas of Sao Paulo city, Brazil.

Methods: Data from the "Ver na Escola" Project were used for the current study.