Objectives The aim of this study was to estimate the prevalence and causes of vision
impairment (VI) in Portugal. Setting Information about people with VI was obtained from …

Purpose: To estimate the prevalence of visual impairment in the general population of a
Portuguese municipality using capture-recapture (CR) methods. Methods: Three lists with …

Purpose Causes of vision impairment (VI) are influenced by factors such as race or socio-
economic circumstances. Because of this collecting national information is important for …

Background Within a surveillance of the prevalence and causes of vision impairment in high-
income regions and Central/Eastern Europe, we update figures through 2015 and forecast …

Aim From the most recent data the magnitude of visual impairment and its causes in 2010
have been estimated, globally and by WHO region. The definitions of visual impairment are …

Aim The scientific literature contains recent data on the prevalence of blindness and low
vision for a few European countries, but most of these studies have been focused …

Objective To study socio-demographic characteristics and main causes related to visual
impairment (VI) as a function of age bracket and to analyze their trends over time in the …

Aim To study the incidence of visual loss over a 12-year period in the survivors of an original
cohort aged 40 years or older at baseline. Methods Visual acuity (VA) was measured by …

Background Vision loss is a major public health concern that significantly affects developing
countries, including South Africa. Although existing literature have reported on the …

PURPOSE: To study the incidence of blindness and low vision over a 7-year period.
DESIGN: Population-based cohort study. PARTICIPANTS: The survivors of the original …