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The Challenge: Avoidable Blindness and Visual Impairment Worldwide

The Challenge: Avoidable Blindness and Visual Impairment Worldwide (Data from the World Health Organization - WHO). Population based survey, WHO definition. Data from other sources and/or other definition. No data available. The World Reality (WHO Global database 2002). 230 studies

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The Challenge: Avoidable Blindness and Visual Impairment Worldwide

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  1. The Challenge: Avoidable Blindness and Visual Impairment Worldwide (Data from the World Health Organization - WHO)

  2. Population based survey, WHO definition Data from other sources and/or other definition No data available The World Reality(WHO Global database 2002) 230 studies 96 countries

  3. Magnitude (2002 population) • Global estimate (best corrected VA) • Visual impairment: 161 million • of whom: • 37 million Blind • 124 million Low Vision

  4. Visual ImpairmentRegional Distribution Best corrected Visual Acuity < 6/18 (0.3)

  5. Number of Visually Impaired(per Million Population)

  6. Other 13 % ARMD 9% Cataract 47 % Ch Bl 4% DR 5% CO 5% Oncho. 1 % Trachoma 4 % Glaucoma 12% 2002 Global Distribution of Blindness(by Cause)1995 vs. 2002 Other 28 % Cataract 42 % Oncho. 1 % Glaucoma 14% Trachoma 15 % 1995

  7. Global Trends in Blindness Original factors remain unchanged… Vision 2020 still relevant! Ageing + Population growth + Underdevelopment

  8. < 125 125- 249 250 - 499 Cataract Surgical Rate < 500

  9. Immediate Implications Unfinished agenda: • Refractive Errors • Trachoma • Onchocerciasis • Xerophthalmia • Cataract • Diabetic Retinopathy • Glaucoma

  10. 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

  11. Number of Persons with Diabetes(in millions) WHO, Wild & Roglic, 2004

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