Incidence of visual impairment over a 20-year period: the Beaver Dam Eye Study.

ABSTRACT:

Purpose

To describe visual impairment (VI) over a 20-year period and its associations with age-related eye diseases and socioeconomic factors in the Beaver Dam Eye Study.

Design

Population-based cohort study.

Participants

Four thousand nine hundred twenty-six persons 43 to 86 years of age participated in the baseline examination phase from 1988 through 1990, and 3721, 2962, 2375, and 1913 persons participated in follow-up examinations each spaced 5 years apart from 1993 through 1995, 1998 through 2000, 2003 through 2005, and 2008 through 2010, respectively.

Methods

Best-corrected visual acuity after refraction, assessed by the Early Treatment Diabetic Retinopathy Study protocol.

Main outcome measures

Incidence of VI, defined as best-corrected visual acui

SUBMITTER: Klein R 

PROVIDER: S-EPMC3674166 | biostudies-literature | 2013 Jun

REPOSITORIES: biostudies-literature