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REVIEW ARTICLE
Year : 2012  |  Volume : 60  |  Issue : 5  |  Page : 387-395

Future trends in global blindness


Brien Holden Vision Institute, The University of New South Wales, Sydney, Australia

Correspondence Address:
Serge Resnikoff
Brien Holden Vision Institute, Level 4, North Wing, Rupert Myers Building, Gate 14 Barker St, The University of New South Wales, Sydney NSW 2052
Australia
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0301-4738.100532

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The objective of this review is to discuss the available data on the prevalence and causes of global blindness, and some of the associated trends and limitations seen. A literature search was conducted using the terms "global AND blindness" and "global AND vision AND impairment", resulting in seven appropriate articles for this review. Since 1990 the estimate of global prevalence of blindness has gradually decreased when considering the best corrected visual acuity definition: 0.71% in 1990, 0.59% in 2002, and 0.55% in 2010, corresponding to a 0.73% reduction per year over the 2002-2010 period. Significant limitations were found in the comparability between the global estimates in prevalence or causes of blindness or visual impairment. These limitations arise from various factors such as uncertainties about the true cause of the impairment, the use of different definitions and methods, and the absence of data from a number of geographical areas, leading to various extrapolation methods, which in turn seriously limit comparability. Seminal to this discussion on limitations in the comparability of studies and data, is that blindness has historically been defined using best corrected visual acuity.


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