Global magnitude of visual impairment caused by uncorrected refractive errors in 2004
Serge Resnikoff, Donatella Pascolini, Silvio P Mariotti, Gopal P Pokharel
Volume 86, Number 1, January 2008, 63-70
Table 1. Surveys used to estimate global visual impairment from uncorrected refractive errors by WHO subregion, 2004
| WHO subregiona,b | Number of surveys | Countries |
|---|---|---|
| Afr-D | 2 | Mali, Mauritania |
| Afr-E | 1 | South Africa |
| Amr-A | 3 | United States of America |
| Amr-B | 5 | Argentina, Brazil, Chile, Paraguay, Venezuela (Bolivarian Republic of) |
| Amr-D | 2 | Guatemala, Peru |
| Emr-B | 5 | Iran (Islamic Republic of), Lebanon, Oman, Qatar |
| Eur-A | 2 | Ireland, Italy |
| Eur-B2 | 2 | Armenia, Turkmenistan |
| Sear-B | 6 | Malaysia, Philippines, Singapore |
| Sear-D | 13 | Bangladesh, India, Nepal, Pakistan |
| Wpr-A | 4 | Australia |
| Wpr-B1 | 7 | China |
| Wpr-B2 | 16 | Cambodia, Myanmar, Viet Nam |
a Afr, WHO African Region; Amr, WHO Region of the Americas; Emr, WHO Eastern Mediterranean Region; Eur, WHO European Region; Sear, WHO South-East Asia Region; Wpr, WHO Western Pacific Region.b In subregions Emr-D, Eur-B1, Eur-C and Wpr-B3, no population-based surveys met the selection criteria.