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Titolo:
Prevalence and causes of visual impairment according to World Health Organization and United States criteria in an aged, urban Scandinavian population - The Copenhagen City Eye Study
Autore:
Buch, H; Vinding, T; Nielsen, NV;
Indirizzi:
Natl Univ Hosp Rigshosp, Dept Ophthalmol E2061, DK-2100 Copenhagen, Denmark Natl Univ Hosp Rigshosp Copenhagen Denmark DK-2100 0 Copenhagen, Denmark
Titolo Testata:
OPHTHALMOLOGY
fascicolo: 12, volume: 108, anno: 2001,
pagine: 2347 - 2357
SICI:
0161-6420(200112)108:12<2347:PACOVI>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
BLUE MOUNTAINS EYE; NURSING-HOME RESIDENTS; BEAVER-DAM EYE; OLDER AMERICANS; DIABETIC-RETINOPATHY; MACULAR DEGENERATION; LOW-VISION; BLINDNESS; ACUITY; BALTIMORE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
41
Recensione:
Indirizzi per estratti:
Indirizzo: Buch, H Natl Univ Hosp Rigshosp, Dept Ophthalmol E2061, Blegdamsvej 9, DK-2100 Copenhagen, Denmark Natl Univ Hosp Rigshosp Blegdamsvej 9 Copenhagen Denmark DK-2100
Citazione:
H. Buch et al., "Prevalence and causes of visual impairment according to World Health Organization and United States criteria in an aged, urban Scandinavian population - The Copenhagen City Eye Study", OPHTHALMOL, 108(12), 2001, pp. 2347-2357

Abstract

Purpose: To evaluate the prevalence and causes of visual impairment in an epidemiologic study of aged, urban individuals in Denmark. Design: Cross-sectional study. Participants: The study population consisted of 1000 randomly selected residents aged 60 to 80 years in Copenhagen, Denmark. Of 976 eligible persons,946 (96.9%) could be examined. Information about best-corrected visual acuity (VA) was obtained from 944 cooperative persons (96.7%). Methods: Data from the Copenhagen City Eye Study were used to assess the cause-specific prevalence of visual impairment as defined by the World Health Organization (WHO) (VA worse than 20/60-20/400 in the better eye) and thecriteria used most commonly in the United States (VA worse than 20/40 but better than 20/200 in the better eye). Eligible subjects underwent an extensive ophthalmologic examination at The National University Hospital of Denmark. Main Outcome Measures: Best-corrected VA and primary causes of visual impairment. Results: The prevalence of low vision according to the WHO definition ranged from 2.6% in subjects aged 70 to 74 years to 4.8% in subjects 75 to 80 years of age, with an age-adjusted relative prevalence of 1.58%. Using the U. S. definition, the overall age-adjusted prevalence of visual impairment was 2.9%. The causes of visual impairment according to the WHO criteria were age-related macular degeneration (AMD) (44.4%), cataract (33.3%), glaucoma in combination with cataract (11.1%), myopic macular degeneration (5.6%), and diabetic retinopathy (5.6%). However, according to the U.S. criteria, cataract was the most frequent primary cause (50.0%) and AMD was the second most frequent primary cause (34.4%) of visual impairment. Furthermore, usingthe U.S. criteria diabetic retinopathy was revealed as equally important as AMD and cataract as a cause of visual impairment among persons aged 65 to69 years (33.3%). Conclusions: Increasing age was an independent predictor of visual impairment. Cataract and AMD were the leading causes. Adequate implementation of surgery to treat cataract could reduce visual impairment by 33.3% according to the WHO criteria and by 50% according to the U.S. criteria. (C) 2001 by the American Academy of Ophthalmology.

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Documento generato il 08/04/20 alle ore 11:53:15