title: An Overview of Ophthalmologic Survey Methodology in the 2008-2015 Korean National Health and Nutrition Examination Surveys.
abstract: The Korea National Health and Nutrition Examination Survey (KNHANES) is a national program designed to assess the health and nutritional status of the noninstitutionalized population of South Korea. The KNHANES was initiated in 1998 and has been conducted annually since 2007. Starting in the latter half of 2008, ophthalmologic examinations were included in the survey in order to investigate the prevalence and risk factors of common eye diseases such as visual impairment, refractive errors, strabismus, blepharoptosis, cataract, pterygium, diabetic retinopathy, age-related macular degeneration, glaucoma, dry eye disease, and color vision deficiency. The measurements included in the ophthalmic questionnaire and examination methods were modified in the KNHANES IV, V, and VI. In this article, we provide detailed information about the methodology of the ophthalmic examinations in KNHANES in order to aid in further investigations related to major eye diseases in South Korea.
authors.affiliation: Department of Ophthalmology, Chonnam National University Hospital, Chonnam National University Medical School, Gwangju, Korea.
authors.forename: Kyung Chul
authors.initials: KC
authors.lastname: Yoon
authors.affiliation: Department of Ophthalmology, Chonnam National University Hospital, Chonnam National University Medical School, Gwangju, Korea.
authors.forename: Won
authors.initials: W
authors.lastname: Choi
authors.affiliation: Department of Ophthalmology, Chonnam National University Hospital, Chonnam National University Medical School, Gwangju, Korea.
authors.forename: Hyo Seok
authors.initials: HS
authors.lastname: Lee
authors.affiliation: Department of Ophthalmology, Wonkwang University School of Medicine, Iksan, Korea.
authors.forename: Sang-Duck
authors.initials: SD
authors.lastname: Kim
authors.affiliation: Department of Ophthalmology, Korea University College of Medicine, Seoul, Korea.
authors.forename: Seung-Hyun
authors.initials: SH
authors.lastname: Kim
authors.affiliation: Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Chan Yun
authors.initials: CY
authors.lastname: Kim
authors.affiliation: Department of Ophthalmology, Seoul National University College of Medicine, Seoul, Korea.
authors.forename: Ki Ho
authors.initials: KH
authors.lastname: Park
authors.affiliation: Department of Ophthalmology, Cheil Eye Hospital, Daegu, Korea.
authors.forename: Young Jeung
authors.initials: YJ
authors.lastname: Park
authors.affiliation: Department of Ophthalmology, Kim's Eye Hospital, Konyang University College of Medicine, Seoul, Korea.
authors.forename: Seung-Hee
authors.initials: SH
authors.lastname: Baek
authors.affiliation: Department of Ophthalmology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.
authors.forename: Su Jeong
authors.initials: SJ
authors.lastname: Song
authors.affiliation: Department of Ophthalmology, Kyungpook National University School of Medicine, Daegu, Korea.
authors.forename: Jae Pil
authors.initials: JP
authors.lastname: Shin
authors.affiliation: Department of Ophthalmology, The Catholic University of Korea College of Medicine, Seoul, Korea.
authors.forename: Suk-Woo
authors.initials: SW
authors.lastname: Yang
authors.affiliation: Department of Ophthalmology, Kyung Hee University School of Medicine, Seoul, Korea.
authors.forename: Seung-Young
authors.initials: SY
authors.lastname: Yu
authors.affiliation: Department of Ophthalmology, Pusan National University College of Medicine, Busan, Korea.
authors.forename: Jong Soo
authors.initials: JS
authors.lastname: Lee
authors.affiliation: Department of Ophthalmology, Ewha Womans University School of Medicine, Seoul, Korea.
authors.forename: Key Hwan
authors.initials: KH
authors.lastname: Lim
authors.affiliation: Division of Health and Nutrition Survey, Korea Centers for Disease Control and Prevention, Cheongju, Korea.
authors.forename: Kyung Won
authors.initials: KW
authors.lastname: Oh
authors.affiliation: Department of Ophthalmology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
authors.forename: Se Woong
authors.initials: SW
authors.lastname: Kang
mesh_terms: D004812:Epidemiologic Methods; D005128:Eye Diseases / Q000453:epidemiology*; D006801:Humans; D009749:Nutrition Surveys / Q000706:statistics & numerical data*; D009885:Ophthalmology / Q000379:methods*; D015995:Prevalence; D056910:Republic of Korea / Q000453:epidemiology; D012307:Risk Factors; D011795:Surveys and Questionnaires
keywords: Epidemiology; Korea National Health and Nutrition Examination Survey; Methods; Ophthalmology