A study found that more than one in four U.S. adults aged 71 years and older are visually impaired, with increasing prevalence related to older age, less education, lower income, non-white race and Hispanic ethnicity.
Data were gathered from the National Health and Aging Trends Study, in which Medicare beneficiaries 65 years and older were tested for distance visual acuity, near visual acuity and contrast sensitivity using tablet-based tests. The WHO definition of visual impairment, based on binocular testing of vision with glasses or contact lenses, was adopted. A total of 3,026 participants