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Global estimates of visual impairment: 2010.

Abstract

AIM

From the most recent data the magnitude of visual impairment and its causes in 2010 have been estimated, globally and by WHO region. The definitions of visual impairment are the current definitions of presenting vision in the International Classification of Diseases version 10.

METHODS

A systematic review was conducted of published and unpublished surveys from 2000 to the present. For countries without data on visual impairment, estimates were based on newly developed imputation methods that took into account country economic status as proxy.

RESULTS

Surveys from 39 countries satisfied the inclusion criteria for this study. Globally, the number of people of all ages visually impaired is estimated to be 285 million, of whom 39 million are blind, with uncertainties of 10-20%. People 50 years and older represent 65% and 82% of visually impaired and blind, respectively. The major causes of visual impairment are uncorrected refractive errors (43%) followed by cataract (33%); the first cause of blindness is cataract (51%).

CONCLUSION

This study indicates that visual impairment in 2010 is a major health issue that is unequally distributed among the WHO regions; the preventable causes are as high as 80% of the total global burden.

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  • Publisher Full Text
  • Authors+Show Affiliations

    ,

    World Health Organization, 20 Avenue Appia, 1211 Geneva 27, Switzerland; pascolinid@who.int

    Source

    MeSH

    Blindness
    Global Health
    Humans
    Vision, Low
    Visually Impaired Persons

    Pub Type(s)

    Journal Article
    Research Support, Non-U.S. Gov't
    Review
    Systematic Review

    Language

    eng

    PubMed ID

    22133988

    Citation

    Pascolini, Donatella, and Silvio Paolo Mariotti. "Global Estimates of Visual Impairment: 2010." The British Journal of Ophthalmology, vol. 96, no. 5, 2012, pp. 614-8.
    Pascolini D, Mariotti SP. Global estimates of visual impairment: 2010. Br J Ophthalmol. 2012;96(5):614-8.
    Pascolini, D., & Mariotti, S. P. (2012). Global estimates of visual impairment: 2010. The British Journal of Ophthalmology, 96(5), pp. 614-8. doi:10.1136/bjophthalmol-2011-300539.
    Pascolini D, Mariotti SP. Global Estimates of Visual Impairment: 2010. Br J Ophthalmol. 2012;96(5):614-8. PubMed PMID: 22133988.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Global estimates of visual impairment: 2010. AU - Pascolini,Donatella, AU - Mariotti,Silvio Paolo, Y1 - 2011/12/01/ PY - 2011/12/3/entrez PY - 2011/12/3/pubmed PY - 2012/6/7/medline SP - 614 EP - 8 JF - The British journal of ophthalmology JO - Br J Ophthalmol VL - 96 IS - 5 N2 - AIM: From the most recent data the magnitude of visual impairment and its causes in 2010 have been estimated, globally and by WHO region. The definitions of visual impairment are the current definitions of presenting vision in the International Classification of Diseases version 10. METHODS: A systematic review was conducted of published and unpublished surveys from 2000 to the present. For countries without data on visual impairment, estimates were based on newly developed imputation methods that took into account country economic status as proxy. RESULTS: Surveys from 39 countries satisfied the inclusion criteria for this study. Globally, the number of people of all ages visually impaired is estimated to be 285 million, of whom 39 million are blind, with uncertainties of 10-20%. People 50 years and older represent 65% and 82% of visually impaired and blind, respectively. The major causes of visual impairment are uncorrected refractive errors (43%) followed by cataract (33%); the first cause of blindness is cataract (51%). CONCLUSION: This study indicates that visual impairment in 2010 is a major health issue that is unequally distributed among the WHO regions; the preventable causes are as high as 80% of the total global burden. SN - 1468-2079 UR - https://www.unboundmedicine.com/medline/citation/22133988/full_citation L2 - http://bjo.bmj.com/cgi/pmidlookup?view=long&pmid=22133988 DB - PRIME DP - Unbound Medicine ER -