Survey on Visual Impairment and Refractive Errors on Ta'u Island, American Samoa.

Purpose: To assess the prevalence of presenting visual impairment and refractive errors on the isolated island of Ta'u, American Samoa.

Methods: Presenting visual acuity and refractive errors of 124 adults over 40 years of age (55 male and 69 female) were measured using the Snellen chart and an autorefractometer. This sample represented over 50% of the island's eligible population.