Number of People Blind or Visually Impaired by Cataract Worldwide and in World Regions, 1990 to 2010.

Khairallah, Moncef and Kahloun, Rim and Bourne, Rupert and Limburg, Hans and Flaxman, Seth R. and Jonas, Jost B. and Keeffe, Jill and Leasher, Janet and Naidoo, Kovin and Pesudovs, Konrad and Price, Holly and White, Richard A. and Wong, Tien Y. and Resnikoff, Serge and Taylor, Hugh R. (2015) Number of People Blind or Visually Impaired by Cataract Worldwide and in World Regions, 1990 to 2010. Investigative Ophthalmology & Visual Science. ISSN 1552-5783 (Draft)

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Abstract

To estimate prevalence and number of people visually impaired or blind due to cataract.METHODS: Based on the Global Burden of Diseases Study 2010 and ongoing literature research, we examined how many people were affected by moderate to severe vision impairment (MSVI; presenting visual acuity <6/18, ≥3/60) and blindness (presenting visual acuity <3/60) due to cataract. RESULTS: In 2010, of overall 32.4 million blind and 191 million vision impaired, 10.8 million people were blind and 35.1 million were visually impaired due to cataract. Cataract caused worldwide 33.4% of all blindness in 2010, and 18.4% of all MSVI. These figures were lower in the high-income regions (<15%) and higher (>40%) in South and Southeast Asia and Oceania. From 1990 to 2010, the number of blind or visually impaired due to cataract decreased by 11.4% and by 20.2%, respectively; the age-standardized global prevalence of cataract-related blindness and MSVI reduced by 46% and 50%, respectively, and the worldwide crude prevalence of cataract-related blindness and MSVI reduced by 32% and 39%, respectively. The percentage of global blindness and MSVI caused by cataract decreased from 38.6% to 33.4%, and from 25.6% to 18.4%, respectively. This decrease took place in almost all world regions, except East Sub-Saharan Africa. CONCLUSIONS: In 2010, one in three blind people was blind due to cataract, and one of six visually impaired people was visually impaired due to cataract. Despite major improvements in terms of reduction of prevalence, cataract remains a major public health problem.

Item Type: Journal Article
Additional Information: Citation: Khairallah, M., Kahloun, R., Bourne, R., Limburg, H., Flaxman, S.R., Jonas, J.B., Keeffe, J., Leasher, J., Naidoo, K., Pesudovs, K., Price, H., White, R.A., Wong, T.Y., Resnikoff, S., Taylor, H.R. and Vision Loss Expert Grp Global, 2015. Number of People Blind or Visually Impaired by Cataract Worldwide and in World Regions, 1990 to 2010. Investigative ophthalmology & visual science, 56 (11), pp.6762-6769.
Faculty: Faculty of Science & Technology
Depositing User: Mr I Walker
Date Deposited: 29 Feb 2016 09:30
Last Modified: 03 Jul 2017 09:11
URI: http://arro.anglia.ac.uk/id/eprint/600361

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