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Five-year incidence of visual impairment and blindness in older Icelanders: the Reykjavik Eye Study.
Acta Ophthalmol. 2010 May; 88(3):358-66.AO

Abstract

PURPOSE

This study examined age, sex and cause-specific 5-year incidence of visual impairment and blindness in a middle-aged and elderly Icelandic population.

METHODS

The study cohort consisted of a population-based, random sample of citizens aged > or = 50 years. Of 1379 eligible subjects, 1045 underwent a baseline examination in 1996; 846 of the 958 survivors (88.2%) underwent a 5-year follow-up examination in 2001. All participants underwent an extensive ophthalmological examination including best corrected visual acuity (BCVA) using a Snellen chart. We used World Health Organization (WHO) criteria, which define visual impairment as BCVA in the better eye of < 6/18 and > or = 3/60 and blindness as BCVA in the better eye of < 3/60. We also used US criteria, which consider BCVA of < 6/12 and > 6/60 in the better eye to represent visual impairment and BCVA of < or = 6/60 in the better eye to represent blindness. The causes of incident visual loss in either eye were determined. Deterioration or improvement in vision were defined as a loss or gain of > or = 2 Snellen lines.

RESULTS

According to WHO criteria, 5-year incidence of bilateral visual impairment and blindness were 1.07% (95% confidence interval [CI] 0.37-1.76) and 0.35% (95% CI 0.00-0.76), respectively. Using US criteria, equivalent incidence of bilateral visual impairment and blindness were 3.49% (95% CI 2.24-4.74) and 0.95% (95% CI 0.29-1.60), respectively. Age-related macular degeneration and cataract were the major causes of incident visual impairment and blindness.

CONCLUSIONS

Incidences of visual impairment and blindness increased significantly with age. Age-related macular degeneration, present in 75% of affected persons, was the most common cause of 5-year incident legal blindness in this middle-aged and elderly Icelandic population.

Authors+Show Affiliations

Department of Ophthalmology, University of Iceland, Iceland.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

19222399

Citation

Gunnlaugsdottir, Elin, et al. "Five-year Incidence of Visual Impairment and Blindness in Older Icelanders: the Reykjavik Eye Study." Acta Ophthalmologica, vol. 88, no. 3, 2010, pp. 358-66.
Gunnlaugsdottir E, Arnarsson A, Jonasson F. Five-year incidence of visual impairment and blindness in older Icelanders: the Reykjavik Eye Study. Acta Ophthalmol. 2010;88(3):358-66.
Gunnlaugsdottir, E., Arnarsson, A., & Jonasson, F. (2010). Five-year incidence of visual impairment and blindness in older Icelanders: the Reykjavik Eye Study. Acta Ophthalmologica, 88(3), 358-66. https://doi.org/10.1111/j.1755-3768.2008.01445.x
Gunnlaugsdottir E, Arnarsson A, Jonasson F. Five-year Incidence of Visual Impairment and Blindness in Older Icelanders: the Reykjavik Eye Study. Acta Ophthalmol. 2010;88(3):358-66. PubMed PMID: 19222399.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Five-year incidence of visual impairment and blindness in older Icelanders: the Reykjavik Eye Study. AU - Gunnlaugsdottir,Elin, AU - Arnarsson,Arsaell, AU - Jonasson,Fridbert, Y1 - 2009/02/11/ PY - 2009/2/19/entrez PY - 2009/2/19/pubmed PY - 2010/8/7/medline SP - 358 EP - 66 JF - Acta ophthalmologica JO - Acta Ophthalmol VL - 88 IS - 3 N2 - PURPOSE: This study examined age, sex and cause-specific 5-year incidence of visual impairment and blindness in a middle-aged and elderly Icelandic population. METHODS: The study cohort consisted of a population-based, random sample of citizens aged > or = 50 years. Of 1379 eligible subjects, 1045 underwent a baseline examination in 1996; 846 of the 958 survivors (88.2%) underwent a 5-year follow-up examination in 2001. All participants underwent an extensive ophthalmological examination including best corrected visual acuity (BCVA) using a Snellen chart. We used World Health Organization (WHO) criteria, which define visual impairment as BCVA in the better eye of < 6/18 and > or = 3/60 and blindness as BCVA in the better eye of < 3/60. We also used US criteria, which consider BCVA of < 6/12 and > 6/60 in the better eye to represent visual impairment and BCVA of < or = 6/60 in the better eye to represent blindness. The causes of incident visual loss in either eye were determined. Deterioration or improvement in vision were defined as a loss or gain of > or = 2 Snellen lines. RESULTS: According to WHO criteria, 5-year incidence of bilateral visual impairment and blindness were 1.07% (95% confidence interval [CI] 0.37-1.76) and 0.35% (95% CI 0.00-0.76), respectively. Using US criteria, equivalent incidence of bilateral visual impairment and blindness were 3.49% (95% CI 2.24-4.74) and 0.95% (95% CI 0.29-1.60), respectively. Age-related macular degeneration and cataract were the major causes of incident visual impairment and blindness. CONCLUSIONS: Incidences of visual impairment and blindness increased significantly with age. Age-related macular degeneration, present in 75% of affected persons, was the most common cause of 5-year incident legal blindness in this middle-aged and elderly Icelandic population. SN - 1755-3768 UR - https://www.unboundmedicine.com/medline/citation/19222399/Five_year_incidence_of_visual_impairment_and_blindness_in_older_Icelanders:_the_Reykjavik_Eye_Study_ L2 - https://doi.org/10.1111/j.1755-3768.2008.01445.x DB - PRIME DP - Unbound Medicine ER -