Vision Impairment : EpidemiologyVision Impairment: Epidemiology Prof S. Resnikoff MD PhD ICO...
Transcript of Vision Impairment : EpidemiologyVision Impairment: Epidemiology Prof S. Resnikoff MD PhD ICO...
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Vision Impairment: Epidemiology
Prof S. Resnikoff MD PhD
ICO Director of Eye Care Delivery - Geneva
BHVI - Sydney
2nd International Course in Visual Health
February 14th – 15th, 2020, Querétaro
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Outline
1. Burden: absolute numbers
2. Prevalence: Latin America vs other regions
3. Trends and projections
4. Avoidable vs Unavoidable VI
5. Needs for Low Vision services
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2015 Global data
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Near distance VI:
1.1 billion
Classification Issue:
Near Distance VI
not included in ICD 10
Far distance VI: 0.253 Billion
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3.20%
3.25%
3.30%
3.35%
3.40%
3.45%
3.50%
3.55%
3.60%
3.65%
1990 1995 2000 2005 2010 2015 2020
Crude Prevalence of Vision Impairment
Presenting VA < 0.3 (6/18)
(World, all ages, 1990 – 2020)
0
0.005
0.01
0.015
0.02
0.025
0.03
0.035
0.04
0.045
0.05
1990 1995 2000 2005 2010 2015 2020
Age-stand. Prevalence of Vision Imp.
Presenting VA < 0.3 (6/18)
(World, all-ages, 1990 – 2020)
Importance of Global
Population Ageing
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Ageing: 2010 (pop 65+)
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Ageing: 2050 (pop 65+)
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7 Super-Regions – Vision impairment (PVA < 0.3 (6/18)
India
0
0.01
0.02
0.03
0.04
0.05
1990 1995 2000 2005 2010 2015 2020
Crude Prevalence VI
Central/East Europe
Africa
High Income Countries
Middle East North Afr.
Latin Am Caribbean
China
The situation in Africa is
less worrying than in Asia
Inequities ?
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RE
Other
AMD
Glaucoma
CODR
Tra
RE
Other
AMD
Glaucoma CODR Tra
RE
Other
AMD
Glaucoma
CODR Tra
Cataract Cataract Cataract
Blindness
(PVA < 0.05)
Mod. & Severe VI
(PVA 0.3 – 0.05)
Visual Impairment
(PVA < 0.3)
Avoidable vs Unavoidable Visual Impairment
Curable vs Non Curable Visual Impairment
56% 75%78%
Curable (URE+Cataract)
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Avoidable Blindness – 21 GBD Regions
0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
80.0% South Asia: 72%
High
Income
Countries
33%
Avoidable Blindness
nowhere eliminated
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Low Vision Services and Rehabilitation needs
253 million with Visual Impairment
(36 million Blind + 217 million MSVI)
56% of Blind
and 78% of MSVI
are curable
189 million could
have their sight restored
through cataract surgery
or provision of glasses
25% of VI cannot have
their sight restored
but have residual vision
5% of Blind
have NLP or LP+
2 million
need
Rehabilitation
62 million
need Low Vision
Services
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Low vision service coverage
No information No services provided≤10%11-50%>50%
80% of countries have ≤10% coverage
Peggy Chiang & Jill Keeffe