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The Sivaganga eye survey: I. Blindness and cataract surgery.
Ophthalmic Epidemiol 2002; 9(5):299-312OE

Abstract

PURPOSE

To assess the prevalence of visual acuity impairment, blindness, and cataract surgery among older adults in rural southern India.

METHODS

Random selection of village- and urban-based clusters was used to identify a cross-sectional sample of persons 50 years of age or older from the Sivaganga district of Tamil Nadu. Subjects in 25 selected clusters were enumerated through a door-to-door survey and invited to examination sites for measurement of uncorrected, presenting, and best-corrected visual acuity and ocular examination in 1999. The principal cause was identified for eyes with presenting visual acuity worse than 6/18. Quality assurance monitoring of visual acuity measurements took place in five of the study clusters.

RESULTS

A total of 5081 persons in 3517 households were enumerated, and 4642 (91.4%) were examined. Thirty-six percent presented with visual acuity worse than 6/18 in the better eye. The prevalence of blindness, based on visual acuity worse than 6/60 in both eyes, was 6.0% (95% confidence interval [CI]: 5.1% to 6.9%) with presenting vision, and 2.5% (95% CI: 1.8% to 3.1%) with best correction. Blindness with presenting visual acuity was associated with older age and illiteracy. Cataract was the principal cause of blindness in one or both eyes in 69.4% of those presenting blind, and uncorrected aphakia and other refractive error affected 35.6% in at least one eye. The prevalence of cataract surgery was 14.7% (95% CI: 13.0% to 16.4%); low surgical coverage among the cataract blind was associated with illiteracy.

CONCLUSIONS

It appears that much has been done in the prevention of blindness in Sivaganga. Nevertheless, blindness remains an important public health problem, mainly because of cataract and refractive error. Prevention of blindness programs in the area should target these two causes, with special emphasis on the elderly and the illiterate.

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

12528915

Citation

Thulasiraj, R D., et al. "The Sivaganga Eye Survey: I. Blindness and Cataract Surgery." Ophthalmic Epidemiology, vol. 9, no. 5, 2002, pp. 299-312.
Thulasiraj RD, Rahamathulla R, Saraswati A, et al. The Sivaganga eye survey: I. Blindness and cataract surgery. Ophthalmic Epidemiol. 2002;9(5):299-312.
Thulasiraj, R. D., Rahamathulla, R., Saraswati, A., Selvaraj, S., & Ellwein, L. B. (2002). The Sivaganga eye survey: I. Blindness and cataract surgery. Ophthalmic Epidemiology, 9(5), pp. 299-312.
Thulasiraj RD, et al. The Sivaganga Eye Survey: I. Blindness and Cataract Surgery. Ophthalmic Epidemiol. 2002;9(5):299-312. PubMed PMID: 12528915.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The Sivaganga eye survey: I. Blindness and cataract surgery. AU - Thulasiraj,R D, AU - Rahamathulla,Raheem, AU - Saraswati,A, AU - Selvaraj,S, AU - Ellwein,Leon B, PY - 2003/1/17/pubmed PY - 2003/2/13/medline PY - 2003/1/17/entrez SP - 299 EP - 312 JF - Ophthalmic epidemiology JO - Ophthalmic Epidemiol VL - 9 IS - 5 N2 - PURPOSE: To assess the prevalence of visual acuity impairment, blindness, and cataract surgery among older adults in rural southern India. METHODS: Random selection of village- and urban-based clusters was used to identify a cross-sectional sample of persons 50 years of age or older from the Sivaganga district of Tamil Nadu. Subjects in 25 selected clusters were enumerated through a door-to-door survey and invited to examination sites for measurement of uncorrected, presenting, and best-corrected visual acuity and ocular examination in 1999. The principal cause was identified for eyes with presenting visual acuity worse than 6/18. Quality assurance monitoring of visual acuity measurements took place in five of the study clusters. RESULTS: A total of 5081 persons in 3517 households were enumerated, and 4642 (91.4%) were examined. Thirty-six percent presented with visual acuity worse than 6/18 in the better eye. The prevalence of blindness, based on visual acuity worse than 6/60 in both eyes, was 6.0% (95% confidence interval [CI]: 5.1% to 6.9%) with presenting vision, and 2.5% (95% CI: 1.8% to 3.1%) with best correction. Blindness with presenting visual acuity was associated with older age and illiteracy. Cataract was the principal cause of blindness in one or both eyes in 69.4% of those presenting blind, and uncorrected aphakia and other refractive error affected 35.6% in at least one eye. The prevalence of cataract surgery was 14.7% (95% CI: 13.0% to 16.4%); low surgical coverage among the cataract blind was associated with illiteracy. CONCLUSIONS: It appears that much has been done in the prevention of blindness in Sivaganga. Nevertheless, blindness remains an important public health problem, mainly because of cataract and refractive error. Prevention of blindness programs in the area should target these two causes, with special emphasis on the elderly and the illiterate. SN - 0928-6586 UR - https://www.unboundmedicine.com/medline/citation/12528915/The_Sivaganga_eye_survey:_I__Blindness_and_cataract_surgery_ L2 - http://www.diseaseinfosearch.org/result/877 DB - PRIME DP - Unbound Medicine ER -