To assess the prevalence and causes of moderate visual impairment in an urban population in southern India.
Population-based, cross-sectional study.
A total of 2522 (85.4% of the eligible) persons of all ages, including 1399 persons 30 years of age or older, from 24 clusters representative of the population of Hyderabad city.
Testing : The eligible subjects underwent a detailed ocular evaluation, including logarithm of the minimum angle of resolution (logMAR) visual acuity, refraction, slit-lamp biomicroscopy, applanation tonometry, gonioscopy, cataract grading, and stereoscopic dilated fundus evaluation.
Automated threshold visual fields and slit-lamp and fundus photography were done when indicated by standardized criteria.
Moderate visual impairment was defined as presenting distance visual acuity less than 20/40 to 20/200 or visual field loss by predefined standardized conservative criteria in the better eye.
In addition to the 1% prevalence of blindness in this sample reported earlier, moderate visual impairment was present in 303 subjects, an age-gender-adjusted prevalence of 7.2% (95% confidence interval [Cl], 4.5% - 9.9% ; design effect, 2.7).
The major cause of moderate visual impairment was refractive error (59.4%, 95% Cl, 52.3% - 66.5%) followed by cataract (25.3%, 95% Cl, 19% - 31.6%). (...)
Mots-clés Pascal : Déficit, Acuité visuelle, Prévalence, Etiologie, Epidémiologie, Population urbaine, Inde, Asie, Sud, Trouble réfraction oculaire, Homme, Oeil pathologie, Trouble vision
Mots-clés Pascal anglais : Deficiency, Visual acuity, Prevalence, Etiology, Epidemiology, Urban population, India, Asia, South, Refractive error, Human, Eye disease, Vision disorder
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0181020
Code Inist : 002B09K. Création : 16/11/1999.