Prevalence of Visual Impairment in the United States.

The article discusses a medical study conducted to estimate the number of people aged 12 years or older in the United States who have impaired distance vision due to uncorrected refractive error. The context of the study was done in response to the prevalence of visual impairment among the U.S. public not being surveyed nationally in several decades. The study presents the design, methods, results, and conclusions as well as the limitations of the study. Several statistical charts and diagrams are offered.