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Prevalence and causes of visual impairment in an elderly Chinese population in Taiwan: the Shihpai Eye Study.
Ophthalmology. 2004 Jan; 111(1):62-9.O

Abstract

OBJECTIVE

Few population-based data on the prevalence and causes of visual impairment are available from East Asia. The purpose of this study was to determine the prevalence and causes of visual impairment in an elderly Chinese population in Taiwan.

DESIGN

Population-based cross-sectional study.

PARTICIPANTS

The Shihpai Eye Study was a survey of vision and ocular disease among an elderly Chinese population 65 years of age or older residing in Shihpai, Taiwan. A random sample of 2045 elderly residents was identified and selected from the household registration databank. Among them, 1361 (66.6%) underwent a detailed ophthalmic examination.

METHODS

The ophthalmic examination included best-corrected visual acuity measurements using standardized protocols. Visual acuity was assessed with a Snellen E chart. The major cause of visual loss was identified for all participants who were visually impaired.

MAIN OUTCOME MEASURES

Low vision and blindness were defined as a best-corrected visual acuity in the eye with better vision worse than 20/60 to a lower limit of 20/400 and worse than 20/400, respectively, according to World Health Organization categories of visual impairment.

RESULTS

The mean age of the participants was 72.2 (range, 65-91) years old. A total of 40 participants met the World Health Organization criteria of low vision, and 8 were diagnosed as blind. The rate of blindness and low vision was estimated to be 0.59% (95% confidence interval, 0.25%, 1.16%) and 2.94% (95% confidence interval, 2.11%, 3.99%), respectively. There was a significant increase in the rate of low vision (P<0.001) from 0.83% at 65 to 69 years of age to 8.33% at age 80 years or older. There was no gender difference in the prevalence of blindness or low vision. The leading cause of visual impairment was cataract (41.7%), followed by myopic macular degeneration (12.5%) and age-related macular degeneration (10.4%).

CONCLUSIONS

The rate of blindness and low vision is close to that reported for other developed countries. The high frequency of myopic macular degeneration as a major cause of visual loss, however, is not observed in European-derived populations. Specific prevention or low-vision rehabilitation programs should be developed for the elderly Chinese population.

Authors+Show Affiliations

Department of Ophthalmology, Taipei Veterans General Hospital, Taipei, Taiwan. wmhsu@vghtpe.gov.twNo affiliation info availableNo 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

14711715

Citation

Hsu, Wen-Ming, et al. "Prevalence and Causes of Visual Impairment in an Elderly Chinese Population in Taiwan: the Shihpai Eye Study." Ophthalmology, vol. 111, no. 1, 2004, pp. 62-9.
Hsu WM, Cheng CY, Liu JH, et al. Prevalence and causes of visual impairment in an elderly Chinese population in Taiwan: the Shihpai Eye Study. Ophthalmology. 2004;111(1):62-9.
Hsu, W. M., Cheng, C. Y., Liu, J. H., Tsai, S. Y., & Chou, P. (2004). Prevalence and causes of visual impairment in an elderly Chinese population in Taiwan: the Shihpai Eye Study. Ophthalmology, 111(1), 62-9.
Hsu WM, et al. Prevalence and Causes of Visual Impairment in an Elderly Chinese Population in Taiwan: the Shihpai Eye Study. Ophthalmology. 2004;111(1):62-9. PubMed PMID: 14711715.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Prevalence and causes of visual impairment in an elderly Chinese population in Taiwan: the Shihpai Eye Study. AU - Hsu,Wen-Ming, AU - Cheng,Ching-Yu, AU - Liu,Jorn-Hon, AU - Tsai,Su-Ying, AU - Chou,Pesus, PY - 2002/09/02/received PY - 2003/05/13/accepted PY - 2004/1/9/pubmed PY - 2004/1/30/medline PY - 2004/1/9/entrez SP - 62 EP - 9 JF - Ophthalmology JO - Ophthalmology VL - 111 IS - 1 N2 - OBJECTIVE: Few population-based data on the prevalence and causes of visual impairment are available from East Asia. The purpose of this study was to determine the prevalence and causes of visual impairment in an elderly Chinese population in Taiwan. DESIGN: Population-based cross-sectional study. PARTICIPANTS: The Shihpai Eye Study was a survey of vision and ocular disease among an elderly Chinese population 65 years of age or older residing in Shihpai, Taiwan. A random sample of 2045 elderly residents was identified and selected from the household registration databank. Among them, 1361 (66.6%) underwent a detailed ophthalmic examination. METHODS: The ophthalmic examination included best-corrected visual acuity measurements using standardized protocols. Visual acuity was assessed with a Snellen E chart. The major cause of visual loss was identified for all participants who were visually impaired. MAIN OUTCOME MEASURES: Low vision and blindness were defined as a best-corrected visual acuity in the eye with better vision worse than 20/60 to a lower limit of 20/400 and worse than 20/400, respectively, according to World Health Organization categories of visual impairment. RESULTS: The mean age of the participants was 72.2 (range, 65-91) years old. A total of 40 participants met the World Health Organization criteria of low vision, and 8 were diagnosed as blind. The rate of blindness and low vision was estimated to be 0.59% (95% confidence interval, 0.25%, 1.16%) and 2.94% (95% confidence interval, 2.11%, 3.99%), respectively. There was a significant increase in the rate of low vision (P<0.001) from 0.83% at 65 to 69 years of age to 8.33% at age 80 years or older. There was no gender difference in the prevalence of blindness or low vision. The leading cause of visual impairment was cataract (41.7%), followed by myopic macular degeneration (12.5%) and age-related macular degeneration (10.4%). CONCLUSIONS: The rate of blindness and low vision is close to that reported for other developed countries. The high frequency of myopic macular degeneration as a major cause of visual loss, however, is not observed in European-derived populations. Specific prevention or low-vision rehabilitation programs should be developed for the elderly Chinese population. SN - 0161-6420 UR - https://www.unboundmedicine.com/medline/citation/14711715/Prevalence_and_causes_of_visual_impairment_in_an_elderly_Chinese_population_in_Taiwan:_the_Shihpai_Eye_Study_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0161-6420(03)01155-2 DB - PRIME DP - Unbound Medicine ER -