Danish Rural Eye Study: Epidemiology of Adult Visual Impairment.

ABSTRACTPurpose: To examine the frequency and causes of visual impairment (VI) in a select population of Danish adults.Methods: A total of 3843 adults aged 20–94 years from the Danish General Suburban Population Study (GESUS) were included in the population-based, cross-sectional ophthalmological study, Danish Rural Eye Study (DRES). All DRES participants received a comprehensive general health examination preceding their eye examination, including measurement of best-corrected visual acuity (BCVA) for each eye, bilateral 45° retinal fundus photographs and further ophthalmological examination where indicated.Results: Overall, 3826 of 3843 participants (99.6%) had bilateral visual acuity measurements. The overall frequency of VI (BCVA 50 years and 3.7% (95% CI 2.1–6.5%; n = 11) in participants >80 years. The primary causes of VI in the bet...