The EPIC-Norfolk Eye Study: rationale, methods and a cross-sectional analysis of visual impairment in a population-based cohort

To summarise the methods of the European Prospective Investigation of Cancer (EPIC)-Norfolk Eye Study, and to present data on the prevalence of visual impairment and associations with visual impairment in the participants.A population-based cross-sectional study nested within an on-going prospective cohort study (EPIC).East England population (the city of Norwich and its surrounding small towns and rural areas).A total of 8623 participants aged...