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Effective refractive error coverage in adults aged 50 years and older: estimates from population-based surveys in 61 countries

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General Info
Geography 
Ar Riyāḑ
Argentina (ARG)
Bhutan (BTN)
Bolivia (BOL)
Brazil (BRA)
Burundi (BDI)
California
Cambodia (KHM)
Cameroon (CMR)
Chiapas
Chile (CHL)
China (CHN)
Cuba (CUB)
Ecuador (ECU)
Egypt (EGY)
Ethiopia (ETH)
Fatick
Guatemala (GTM)
Honduras (HND)
Hungary (HUN)
India (IND)
Indonesia (IDN)
Irbid
Jordan (JOR)
Kaolack
Kenya (KEN)
Khulna, Koulikoro
Maharashtra
Malawi (MWI)
Malaysia (MYS)
Maldives (MDV)
Mali (MLI)
Mexico (MEX)
Mongolia (MNG)
Morogoro
Nampula, Nangarhār
Nepal (NPL)
Nigeria (NGA)
Nuevo León, Nārāyanī, Oromīya
Pakistan (PAK)
Palestine (PSE)
Panama (PAN)
Peru (PER)
Qatar (QAT)
Querétaro
Rwanda (RWA)
Senegal (SEN)
Singida, Sofala, Sokoto
Uganda (UGA)
Uruguay (URY)
Uttar Pradesh
Viet Nam (VNM)
Yemen (YEM)
Zambia (ZMB)
Coverage type 
Country
Time period covered 
01/2000 - 12/2021