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Prevalence and risk factors of visual impairment and blindness in Korea: The Fourth Korea National Health and Nutrition Examination Survey in 2008-2010

 Tyler H. T. Rim  ;  Jae S. Nam  ;  Moonjung Choi  ;  Sung C. Lee  ;  Christopher S. Lee 
 Acta Ophthalmologica, Vol.92(4) : 317-325, 2014 
Journal Title
 Acta Ophthalmologica 
Issue Date
Adolescent ; Adult ; Age Distribution ; Aged ; Aged, 80 and over ; Blindness/epidemiology* ; Child ; Child, Preschool ; Female ; Health Surveys ; Humans ; Male ; Middle Aged ; Nutrition Surveys/statistics & numerical data ; Prevalence ; Republic of Korea/epidemiology ; Risk Factors ; Sex Distribution ; Vision, Low/epidemiology* ; Visual Acuity/physiology ; Visually Impaired Persons/statistics & numerical data* ; Young Adult
Korea National Health and Nutrition Examination Survey ; blindness ; risk factors ; visual impairment
PURPOSE: To describe the age, gender specific prevalence and risk factors of visual impairment and blindness in Korea. METHODS: From 2008 to 2010, a total 14 924 randomly selected national representative participants of the Korea National Health and Nutrition Examination Survey underwent additional ophthalmologic examinations by the Korean Ophthalmologic Society. Best Corrected Distance Visual Acuity was measured using an international standard vision chart based on Snellen scale (Jin's vision chart). Independent risk factors for visual impairment were investigated using multivariate logistic regression analysis. RESULTS: The overall prevalence of visual impairment (≤20/40) of adults 40 years and older was 4.1% (95% CI, 3.6-4.6) based on the better seeing eye. The overall prevalence of blindness (≤20/200) for adults 40 years and older was 0.2% (95% CI, 0.1-0.3). Risk indicators of visual impairment were increasing age, low education status, living in rural area, being unemployed, being without spouse and the absence of private health insurance. The visually impaired were more likely to have eye diseases compared with the normal subjects, and they were less likely to utilize eye care. CONCLUSION: The prevalence of visual impairment was demonstrated to be higher while that of blindness was similar to previous population studies in Asia or U.S. Sociodemographic disparities are present in the prevalence of visual impairment and more targeted efforts are needed to promote vision screening in high risk groups.
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1. College of Medicine (의과대학) > Dept. of Ophthalmology (안과학교실) > 1. Journal Papers
Yonsei Authors
Lee, Sung Chul(이성철) ORCID logo https://orcid.org/0000-0001-9438-2385
Lee, Christopher Seungkyu(이승규) ORCID logo https://orcid.org/0000-0001-5054-9470
Rim, Tyler Hyungtaek(임형택)
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