Tags

Type your tag names separated by a space and hit enter

Prevalence and causes of visual impairment and blindness in Icelanders aged 50 years and older: the Reykjavik Eye Study.
Acta Ophthalmol. 2008 Nov; 86(7):778-85.AO

Abstract

PURPOSE

This study aimed to study the prevalences and causes of visual impairment and blindness in an Icelandic adult population.

METHODS

The Reykjavik Eye Study includes a random sample of citizens of Reykjavik aged > or = 50 years, with an equal proportion (6.4%) for each year of birth and each sex. A total of 1045 persons were examined, representing a response rate of 75.8%. All participants underwent an extensive ophthalmological examination using a standard protocol. We used World Health Organization (WHO) definitions for bilateral visual impairment (best corrected visual acuity [VA] < 6/18 or visual field of > or = 5 degrees and < 10 degrees around the fixation point in the better eye) and blindness (VA < 3/60 or visual field < 5 degrees in the better eye). We also used US criteria, which define bilateral visual impairment as present if VA is < 6/12 and blindness as present if VA is < or = 6/60 (both in the better eye). The causes of visual loss were determined for all participants found to be visually impaired in one or both eyes.

RESULTS

The prevalences of bilateral visual impairment and blindness were 0.96% (95% confidence interval [CI] 0.37-1.55) and 0.57% (95% CI 0.12-1.03), respectively, using the WHO criteria, and 2.01% (95% CI 1.16-2.86) and 0.77% (95% CI 0.24-1.29), respectively, using the US criteria. The prevalence rates were 4.40% and 5.45% for unilateral visual impairment and 1.72% and 3.06% for unilateral blindness, using the WHO and US criteria, respectively. Age-related macular degeneration (AMD) was the major cause of bilateral visual loss, whereas the most common causes of unilateral visual loss were, in this order, amblyopia, cataract and glaucoma.

CONCLUSIONS

Prevalence of visual loss increases with age. The leading cause of bilateral visual impairment and blindness was AMD, accounting for more than half of all cases, and cases of geographic atrophy outnumbered those of exudative AMD by two to one.

Authors+Show Affiliations

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

Pub Type(s)

Journal Article

Language

eng

PubMed ID

18513265

Citation

Gunnlaugsdottir, Elin, et al. "Prevalence and Causes of Visual Impairment and Blindness in Icelanders Aged 50 Years and Older: the Reykjavik Eye Study." Acta Ophthalmologica, vol. 86, no. 7, 2008, pp. 778-85.
Gunnlaugsdottir E, Arnarsson A, Jonasson F. Prevalence and causes of visual impairment and blindness in Icelanders aged 50 years and older: the Reykjavik Eye Study. Acta Ophthalmol. 2008;86(7):778-85.
Gunnlaugsdottir, E., Arnarsson, A., & Jonasson, F. (2008). Prevalence and causes of visual impairment and blindness in Icelanders aged 50 years and older: the Reykjavik Eye Study. Acta Ophthalmologica, 86(7), 778-85. https://doi.org/10.1111/j.1755-3768.2008.01191.x
Gunnlaugsdottir E, Arnarsson A, Jonasson F. Prevalence and Causes of Visual Impairment and Blindness in Icelanders Aged 50 Years and Older: the Reykjavik Eye Study. Acta Ophthalmol. 2008;86(7):778-85. PubMed PMID: 18513265.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Prevalence and causes of visual impairment and blindness in Icelanders aged 50 years and older: the Reykjavik Eye Study. AU - Gunnlaugsdottir,Elin, AU - Arnarsson,Arsaell, AU - Jonasson,Fridbert, Y1 - 2008/05/30/ PY - 2008/6/3/pubmed PY - 2008/12/25/medline PY - 2008/6/3/entrez SP - 778 EP - 85 JF - Acta ophthalmologica JO - Acta Ophthalmol VL - 86 IS - 7 N2 - PURPOSE: This study aimed to study the prevalences and causes of visual impairment and blindness in an Icelandic adult population. METHODS: The Reykjavik Eye Study includes a random sample of citizens of Reykjavik aged > or = 50 years, with an equal proportion (6.4%) for each year of birth and each sex. A total of 1045 persons were examined, representing a response rate of 75.8%. All participants underwent an extensive ophthalmological examination using a standard protocol. We used World Health Organization (WHO) definitions for bilateral visual impairment (best corrected visual acuity [VA] < 6/18 or visual field of > or = 5 degrees and < 10 degrees around the fixation point in the better eye) and blindness (VA < 3/60 or visual field < 5 degrees in the better eye). We also used US criteria, which define bilateral visual impairment as present if VA is < 6/12 and blindness as present if VA is < or = 6/60 (both in the better eye). The causes of visual loss were determined for all participants found to be visually impaired in one or both eyes. RESULTS: The prevalences of bilateral visual impairment and blindness were 0.96% (95% confidence interval [CI] 0.37-1.55) and 0.57% (95% CI 0.12-1.03), respectively, using the WHO criteria, and 2.01% (95% CI 1.16-2.86) and 0.77% (95% CI 0.24-1.29), respectively, using the US criteria. The prevalence rates were 4.40% and 5.45% for unilateral visual impairment and 1.72% and 3.06% for unilateral blindness, using the WHO and US criteria, respectively. Age-related macular degeneration (AMD) was the major cause of bilateral visual loss, whereas the most common causes of unilateral visual loss were, in this order, amblyopia, cataract and glaucoma. CONCLUSIONS: Prevalence of visual loss increases with age. The leading cause of bilateral visual impairment and blindness was AMD, accounting for more than half of all cases, and cases of geographic atrophy outnumbered those of exudative AMD by two to one. SN - 1755-3768 UR - https://www.unboundmedicine.com/medline/citation/18513265/Prevalence_and_causes_of_visual_impairment_and_blindness_in_Icelanders_aged_50_years_and_older:_the_Reykjavik_Eye_Study_ L2 - https://doi.org/10.1111/j.1755-3768.2008.01191.x DB - PRIME DP - Unbound Medicine ER -