Prevalence and causes of low vision and blindness in an urban population: The Chennai Glaucoma Study.
Indian J Ophthalmol
; 62(4): 477-81, 2014 Apr.
Article
em En
| MEDLINE
| ID: mdl-23619490
ABSTRACT
AIM:
To evaluate the prevalence and causes of low vision and blindness in an urban south Indian population. SETTINGS ANDDESIGN:
Population-based cross-sectional study. Exactly 3850 subjects aged 40 years and above from Chennai city were examined at a dedicated facility in the base hospital. MATERIALS ANDMETHODS:
All subjects had a complete ophthalmic examination that included best-corrected visual acuity. Low vision and blindness were defined using World Health Organization (WHO) criteria. The influence of age, gender, literacy, and occupation was assessed using multiple logistic regression. STATISTICALANALYSIS:
Chi-square test, t-test, and multivariate analysis were used.RESULTS:
Of the 4800 enumerated subjects, 3850 subjects (1710 males, 2140 females) were examined (response rate, 80.2%). The prevalence of blindness was 0.85% (95% CI 0.6-1.1%) and was positively associated with age and illiteracy. Cataract was the leading cause (57.6%) and glaucoma was the second cause (16.7%) for blindness. The prevalence of low vision was 2.9% (95% CI 2.4-3.4%) and visual impairment (blindness + low vision) was 3.8% (95% CI 3.2-4.4%). The primary causes for low vision were refractive errors (68%) and cataract (22%).CONCLUSIONS:
In this urban population based study, cataract was the leading cause for blindness and refractive error was the main reason for low vision.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Erros de Refração
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População Urbana
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Catarata
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Glaucoma
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Cegueira
/
Baixa Visão
Tipo de estudo:
Etiology_studies
/
Observational_studies
/
Prevalence_studies
Limite:
Adult
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Aged
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Aged80
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Female
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Humans
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Male
/
Middle aged
País/Região como assunto:
Asia
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article