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Causes of blindness, low vision, and questionnaire-assessed poor visual function in Singaporean Chinese adults: The Tanjong Pagar Survey.
Ophthalmology. 2004 Jun; 111(6):1161-8.O

Abstract

OBJECTIVE

To determine the prevalence rates and causes of low vision, blindness, and patient-assessed deficient visual function among Singaporean Chinese adults.

DESIGN

Population-based cross-sectional survey.

PARTICIPANTS

Singaporean Chinese adults 40 to 79 years old (n = 1152).

METHODS

From an initial sampling frame of 40- to 79-year-old Chinese in the Tanjong Pagar district in Singapore, 2000 subjects were selected using a disproportionate, stratified, clustered, random-sampling method. Of 1717 eligible subjects, 1232 were examined (participation rate = 71.8%), and 80 adults who did not have visual acuity (VA) data were excluded from the analysis.

MAIN OUTCOME MEASURES

Bilateral low vision was defined as best-corrected VA (BCVA) worse than 6/18 and 3/60 or better, and bilateral blindness as BCVA worse than 3/60 in the better eye or constriction of the visual field to within 10 degrees of fixation, in accordance with the World Health Organization criteria. Patient-assessed visual function was measured using a modified VF-14 questionnaire.

RESULTS

The age- and gender-adjusted prevalence rates were 1.1% (95% confidence interval [CI], 0.6-1.8) for bilateral low vision and 0.5% (95% CI, 0.2-1.1) for bilateral blindness, and the mean visual function score was 98.6. The rates of bilateral low vision and blindness increased with age, whereas visual function scores decreased with age, even after adjusting for gender and education. Cataract accounted for 58.8% of bilateral low vision, 20.0% of bilateral blindness, and 52.0% of poor visual function (score<90). Glaucoma contributed to 60.0% of bilateral blindness.

CONCLUSION

The age- and gender-adjusted rates of low vision and blindness were 1.1% and 0.5%, respectively. Glaucoma is a leading cause of blindness in Singaporean Chinese adults, in addition to well-recognized causes in the rest of Asia such as cataract.

Authors+Show Affiliations

Glaucoma Research Unit, Moorfields Eye Hospital, London, United Kingdom.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

15177966

Citation

Saw, Seang-Mei, et al. "Causes of Blindness, Low Vision, and Questionnaire-assessed Poor Visual Function in Singaporean Chinese Adults: the Tanjong Pagar Survey." Ophthalmology, vol. 111, no. 6, 2004, pp. 1161-8.
Saw SM, Foster PJ, Gazzard G, et al. Causes of blindness, low vision, and questionnaire-assessed poor visual function in Singaporean Chinese adults: The Tanjong Pagar Survey. Ophthalmology. 2004;111(6):1161-8.
Saw, S. M., Foster, P. J., Gazzard, G., & Seah, S. (2004). Causes of blindness, low vision, and questionnaire-assessed poor visual function in Singaporean Chinese adults: The Tanjong Pagar Survey. Ophthalmology, 111(6), 1161-8.
Saw SM, et al. Causes of Blindness, Low Vision, and Questionnaire-assessed Poor Visual Function in Singaporean Chinese Adults: the Tanjong Pagar Survey. Ophthalmology. 2004;111(6):1161-8. PubMed PMID: 15177966.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Causes of blindness, low vision, and questionnaire-assessed poor visual function in Singaporean Chinese adults: The Tanjong Pagar Survey. AU - Saw,Seang-Mei, AU - Foster,Paul J, AU - Gazzard,Gus, AU - Seah,Steve, PY - 2003/05/14/received PY - 2003/09/15/accepted PY - 2004/6/5/pubmed PY - 2004/6/29/medline PY - 2004/6/5/entrez SP - 1161 EP - 8 JF - Ophthalmology JO - Ophthalmology VL - 111 IS - 6 N2 - OBJECTIVE: To determine the prevalence rates and causes of low vision, blindness, and patient-assessed deficient visual function among Singaporean Chinese adults. DESIGN: Population-based cross-sectional survey. PARTICIPANTS: Singaporean Chinese adults 40 to 79 years old (n = 1152). METHODS: From an initial sampling frame of 40- to 79-year-old Chinese in the Tanjong Pagar district in Singapore, 2000 subjects were selected using a disproportionate, stratified, clustered, random-sampling method. Of 1717 eligible subjects, 1232 were examined (participation rate = 71.8%), and 80 adults who did not have visual acuity (VA) data were excluded from the analysis. MAIN OUTCOME MEASURES: Bilateral low vision was defined as best-corrected VA (BCVA) worse than 6/18 and 3/60 or better, and bilateral blindness as BCVA worse than 3/60 in the better eye or constriction of the visual field to within 10 degrees of fixation, in accordance with the World Health Organization criteria. Patient-assessed visual function was measured using a modified VF-14 questionnaire. RESULTS: The age- and gender-adjusted prevalence rates were 1.1% (95% confidence interval [CI], 0.6-1.8) for bilateral low vision and 0.5% (95% CI, 0.2-1.1) for bilateral blindness, and the mean visual function score was 98.6. The rates of bilateral low vision and blindness increased with age, whereas visual function scores decreased with age, even after adjusting for gender and education. Cataract accounted for 58.8% of bilateral low vision, 20.0% of bilateral blindness, and 52.0% of poor visual function (score<90). Glaucoma contributed to 60.0% of bilateral blindness. CONCLUSION: The age- and gender-adjusted rates of low vision and blindness were 1.1% and 0.5%, respectively. Glaucoma is a leading cause of blindness in Singaporean Chinese adults, in addition to well-recognized causes in the rest of Asia such as cataract. SN - 0161-6420 UR - https://www.unboundmedicine.com/medline/citation/15177966/Causes_of_blindness_low_vision_and_questionnaire_assessed_poor_visual_function_in_Singaporean_Chinese_adults:_The_Tanjong_Pagar_Survey_ DB - PRIME DP - Unbound Medicine ER -