Prevalence and causes of blindness in the rural population of the Chennai Glaucoma Study

L. Vijaya, R. George, H. Arvind, M. Baskaran, P. Raju, S. V. Ramesh, P. G. Paul, G. Kumaramanickavel, C. McCarty

Research output: Contribution to journalArticle

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Abstract

Aim: To study the prevalence and causes of blindness in a rural south Indian population. Methods: 3924/4800 enumerated (81.75%) subjects, aged 40 years or more from rural Tamil Nadu, underwent comprehensive ophthalmic examination-visual acuity, refraction, intraocular pressure, gonioscopy, cataract grading (LOGS II), retinal examination, and SITA Standard where indicated. Blindness was defined using WHO criteria as best corrected visual acuity of less than 3/60 and/or visual field of less than 10 degrees in the better eye. The influence of age, sex, literacy, and occupation was assessed using multiple logistic regression. Results: 753 subjects (19.2%; 321 males, 432 females) presented with a visual acuity of <3/60; 132 subjects (3.36%, 95% CI: 2.80 to 3.93) were diagnosed to be blind. Cataract was responsible in 74.62% of eyes; glaucoma, cystoid macular oedema, optic atrophy, and corneal scars accounted for 3.79% each. Bilateral causes of blindness were cataract (78.63%), glaucoma (4.29%), optic atrophy (3.42%), cystoid macular oedema, and corneal scars (2.56% each). In 19 eyes (7.2%) the blindness was probably related to cataract surgery. Blindness was positively associated with increasing age (p<0.0001). Conclusion: 3.36% of the studied rural population was bilaterally blind, with cataract being the single most important cause.

Original languageEnglish
Pages (from-to)407-410
Number of pages4
JournalBritish Journal of Ophthalmology
Volume90
Issue number4
DOIs
Publication statusPublished - 01-04-2006

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Rural Population
Blindness
Glaucoma
Cataract
Visual Acuity
Optic Atrophy
Macular Edema
Gonioscopy
Visual Fields
Intraocular Pressure
Occupations
Cross-Sectional Studies
Logistic Models
Population
Corneal Injuries

All Science Journal Classification (ASJC) codes

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

Cite this

Vijaya, L. ; George, R. ; Arvind, H. ; Baskaran, M. ; Raju, P. ; Ramesh, S. V. ; Paul, P. G. ; Kumaramanickavel, G. ; McCarty, C. / Prevalence and causes of blindness in the rural population of the Chennai Glaucoma Study. In: British Journal of Ophthalmology. 2006 ; Vol. 90, No. 4. pp. 407-410.
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Vijaya, L, George, R, Arvind, H, Baskaran, M, Raju, P, Ramesh, SV, Paul, PG, Kumaramanickavel, G & McCarty, C 2006, 'Prevalence and causes of blindness in the rural population of the Chennai Glaucoma Study', British Journal of Ophthalmology, vol. 90, no. 4, pp. 407-410. https://doi.org/10.1136/bjo.2005.081406

Prevalence and causes of blindness in the rural population of the Chennai Glaucoma Study. / Vijaya, L.; George, R.; Arvind, H.; Baskaran, M.; Raju, P.; Ramesh, S. V.; Paul, P. G.; Kumaramanickavel, G.; McCarty, C.

In: British Journal of Ophthalmology, Vol. 90, No. 4, 01.04.2006, p. 407-410.

Research output: Contribution to journalArticle

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AU - George, R.

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AU - Ramesh, S. V.

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N2 - Aim: To study the prevalence and causes of blindness in a rural south Indian population. Methods: 3924/4800 enumerated (81.75%) subjects, aged 40 years or more from rural Tamil Nadu, underwent comprehensive ophthalmic examination-visual acuity, refraction, intraocular pressure, gonioscopy, cataract grading (LOGS II), retinal examination, and SITA Standard where indicated. Blindness was defined using WHO criteria as best corrected visual acuity of less than 3/60 and/or visual field of less than 10 degrees in the better eye. The influence of age, sex, literacy, and occupation was assessed using multiple logistic regression. Results: 753 subjects (19.2%; 321 males, 432 females) presented with a visual acuity of <3/60; 132 subjects (3.36%, 95% CI: 2.80 to 3.93) were diagnosed to be blind. Cataract was responsible in 74.62% of eyes; glaucoma, cystoid macular oedema, optic atrophy, and corneal scars accounted for 3.79% each. Bilateral causes of blindness were cataract (78.63%), glaucoma (4.29%), optic atrophy (3.42%), cystoid macular oedema, and corneal scars (2.56% each). In 19 eyes (7.2%) the blindness was probably related to cataract surgery. Blindness was positively associated with increasing age (p<0.0001). Conclusion: 3.36% of the studied rural population was bilaterally blind, with cataract being the single most important cause.

AB - Aim: To study the prevalence and causes of blindness in a rural south Indian population. Methods: 3924/4800 enumerated (81.75%) subjects, aged 40 years or more from rural Tamil Nadu, underwent comprehensive ophthalmic examination-visual acuity, refraction, intraocular pressure, gonioscopy, cataract grading (LOGS II), retinal examination, and SITA Standard where indicated. Blindness was defined using WHO criteria as best corrected visual acuity of less than 3/60 and/or visual field of less than 10 degrees in the better eye. The influence of age, sex, literacy, and occupation was assessed using multiple logistic regression. Results: 753 subjects (19.2%; 321 males, 432 females) presented with a visual acuity of <3/60; 132 subjects (3.36%, 95% CI: 2.80 to 3.93) were diagnosed to be blind. Cataract was responsible in 74.62% of eyes; glaucoma, cystoid macular oedema, optic atrophy, and corneal scars accounted for 3.79% each. Bilateral causes of blindness were cataract (78.63%), glaucoma (4.29%), optic atrophy (3.42%), cystoid macular oedema, and corneal scars (2.56% each). In 19 eyes (7.2%) the blindness was probably related to cataract surgery. Blindness was positively associated with increasing age (p<0.0001). Conclusion: 3.36% of the studied rural population was bilaterally blind, with cataract being the single most important cause.

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