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Published bySudomo Tedja Modified over 6 years ago
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Avoidable Blindness and Visual Impairment Worldwide
The Challenge: Avoidable Blindness and Visual Impairment Worldwide (Data from the World Health Organization - WHO)
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The World Reality (WHO Global database 2002)
230 studies 96 countries Population based survey, WHO definition Data from other sources and/or other definition No data available
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Magnitude (2002 population)
Global estimate (best corrected VA) Visual impairment: 161 million of whom: 37 million Blind 124 million Low Vision
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Visual Impairment Regional Distribution
Best corrected Visual Acuity < 6/18 (0.3)
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Number of Visually Impaired (per Million Population)
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Global Distribution of Blindness (by Cause) 1995 vs. 2002
Cataract 47 % Trachoma 4 % Glaucoma 12% Oncho. 1 % Other 13 % ARMD 9% Ch Bl 4% DR 5% CO 2002 Other 28 % Cataract 42 % Oncho. 1 % Glaucoma 14% Trachoma 15 % 1995
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Global Trends in Blindness
Original factors remain unchanged… Global Trends in Blindness Vision 2020 still relevant! Ageing + Population growth + Underdevelopment
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Cataract Surgical Rate < 500
< 125
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Immediate Implications
Unfinished agenda: Refractive Errors Trachoma Onchocerciasis Xerophthalmia Cataract Diabetic Retinopathy Glaucoma
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Medium/Long Term Implications
Changing Patterns: More linked to lifestyle, chronic diseases Age-related Macula Degeneration 3rd Global Cause 1st Cause in an increasing # of countries
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Number of Persons with Diabetes (in millions)
WHO, Wild & Roglic, 2004
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