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Prevalence and causes of low vision and blindness in an urban population: The Chennai Glaucoma Study
AIM: To evaluate the prevalence and causes of low vision and blindness in an urban south Indian population. SETTINGS AND DESIGN: 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. MATERIA...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Medknow Publications & Media Pvt Ltd
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4064227/ https://www.ncbi.nlm.nih.gov/pubmed/23619490 http://dx.doi.org/10.4103/0301-4738.111186 |
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author | Vijaya, Lingam George, Ronnie Asokan, Rashima Velumuri, Lokapavani Ramesh, Sathyamangalam Ve |
author_facet | Vijaya, Lingam George, Ronnie Asokan, Rashima Velumuri, Lokapavani Ramesh, Sathyamangalam Ve |
author_sort | Vijaya, Lingam |
collection | PubMed |
description | AIM: To evaluate the prevalence and causes of low vision and blindness in an urban south Indian population. SETTINGS AND DESIGN: 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 AND METHODS: 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. STATISTICAL ANALYSIS: 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. |
format | Online Article Text |
id | pubmed-4064227 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Medknow Publications & Media Pvt Ltd |
record_format | MEDLINE/PubMed |
spelling | pubmed-40642272014-06-25 Prevalence and causes of low vision and blindness in an urban population: The Chennai Glaucoma Study Vijaya, Lingam George, Ronnie Asokan, Rashima Velumuri, Lokapavani Ramesh, Sathyamangalam Ve Indian J Ophthalmol Community Eye Care AIM: To evaluate the prevalence and causes of low vision and blindness in an urban south Indian population. SETTINGS AND DESIGN: 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 AND METHODS: 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. STATISTICAL ANALYSIS: 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. Medknow Publications & Media Pvt Ltd 2014-04 /pmc/articles/PMC4064227/ /pubmed/23619490 http://dx.doi.org/10.4103/0301-4738.111186 Text en Copyright: © Indian Journal of Ophthalmology http://creativecommons.org/licenses/by-nc-sa/3.0 This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Community Eye Care Vijaya, Lingam George, Ronnie Asokan, Rashima Velumuri, Lokapavani Ramesh, Sathyamangalam Ve Prevalence and causes of low vision and blindness in an urban population: The Chennai Glaucoma Study |
title | Prevalence and causes of low vision and blindness in an urban population: The Chennai Glaucoma Study |
title_full | Prevalence and causes of low vision and blindness in an urban population: The Chennai Glaucoma Study |
title_fullStr | Prevalence and causes of low vision and blindness in an urban population: The Chennai Glaucoma Study |
title_full_unstemmed | Prevalence and causes of low vision and blindness in an urban population: The Chennai Glaucoma Study |
title_short | Prevalence and causes of low vision and blindness in an urban population: The Chennai Glaucoma Study |
title_sort | prevalence and causes of low vision and blindness in an urban population: the chennai glaucoma study |
topic | Community Eye Care |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4064227/ https://www.ncbi.nlm.nih.gov/pubmed/23619490 http://dx.doi.org/10.4103/0301-4738.111186 |
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