Policy and practice: Global data on visual impairment in the year 2002
This paper presents estimates of the prevalence of visual impairment and its causes in 2002, based on the best available evidence derived from recent studies. Estimates were determined from data on low vision and blindness as defined in the International statistical classification of diseases, injuries and causes of death.
Type of publication:Scientific publications
Date of publication:11/01/2004
Author(s):Serge Resnikoff, Donatella Pascolini, Daniel Etya’ale, Ivo Kocur, Ramachandra Pararajasegaram, Gopal P. Pokharel, and Silvio P. Mariotti
Publishing organization:World Health Organization
The burden of visual impairment is not distributed uniformly throughout the world: the least developed regions carry the largest share. Visual impairment is also unequally distributed across age groups, being largely confined to adults 50 years of age and older. A distribution imbalance is also found with regard to gender throughout the world: females have a significantly higher risk of having visual impairment than males.
Notwithstanding the progress in surgical intervention that has been made in many countries over the last few decades, cataract remains the leading cause of visual impairment in all regions of the world, except in the most developed countries.