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A Nationwide Population-Based Study of Low Vision and Blindness in South Korea

Authors
Park, Shin HaeLee, Ji SungHeo, HwanSuh, Young-WooKim, Seung-HyunLim, Key HwanMoon, Nam JuLee, Sung JinPark, Song HeeBaek, Seung-Hee
Issue Date
1월-2015
Publisher
ASSOC RESEARCH VISION OPHTHALMOLOGY INC
Keywords
blindness; low vision; South Korea; visual impairment
Citation
INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE, v.56, no.1, pp.484 - 493
Indexed
SCIE
SCOPUS
Journal Title
INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE
Volume
56
Number
1
Start Page
484
End Page
493
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/94837
DOI
10.1167/iovs.14-14909
ISSN
0146-0404
Abstract
PURPOSE. To investigate the prevalence and associated risk factors of low vision and blindness in the Korean population. METHODS. This cross-sectional, population-based study examined the ophthalmologic data of 22,135 Koreans aged >= 5 years from the fifth Korea National Health and Nutrition Examination Survey (KNHANES V, 2010-2012). According to the World Health Organization criteria, blindness was defined as visual acuity (VA) less than 20/400 in the better-seeing eye, and low vision as VA of 20/60 or worse but 20/400 or better in the better-seeing eye. The prevalence rates were calculated from either presenting VA (PVA) or best-corrected VA (BCVA). Multivariate regression analysis was conducted for adults aged >= 20 years. RESULTS. The overall prevalence rates of PVA-defined low vision and blindness were 4.98% and 0.26%, respectively, and those of BCVA-defined low vision and blindness were 0.46% and 0.05%, respectively. Prevalence increased rapidly above the age of 70 years. For subjects aged >= 70 years, the population-weighted prevalence rates of low vision, based on PVA and BCVA, were 12.85% and 3.87%, respectively, and the corresponding rates of blindness were 0.49% and 0.42%, respectively. The presenting vision problems were significantly associated with age (younger adults or elderly subjects), female sex, low educational level, and lowest household income, whereas the best-corrected vision problems were associated with age >= 70 years, a low educational level, and rural residence. CONCLUSIONS. This population-based study provides useful information for planning optimal public eye health care services in South Korea.
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