Refractive | Strabismic | Visual deprivation | |||||
World region | No of studies | Pooled prevalence (95% CI) | Proportion (%) | Pooled prevalence (95% CI) | Proportion (%) | Pooled prevalence (95% CI) | Proportion (%) |
Asia | 23 | 0.84 (0.62 to 1.14) | 81.52 | 0.28 (0.19 to 0.41) | 22.62 | 0.03 (0.01 to 0.06) | 2.36 |
Europe | 4 | 1.72 (1.04 to 2.82) | 53.82 | 1.32 (0.78 to 2.24) | 38.82 | 0.29 (0.17 to 0.50) | 8.66 |
Oceania | 3 | 1.67 (0.99 to 2.78) | 74.58 | 0.96 (0.46 to 2.00) | 49.15 | 0.11 (0.05 to 0.24) | 2.82 |
North America | 3 | 1.25 (0.86 to 1.82) | 73.77 | 0.51 (0.31 to 0.86) | 27.87 | 0.04 (0.01 to 0.14) | 0.82 |
Africa | 2 | 0.59 (0.25 to 1.35) | 64.29 | 0.18 (0.03 to 0.93) | 17.86 | 0.18 (0.03 to 0.93) | 17.86 |
Latin America and the Caribbean | 2 | 0.96 (0.73 to 1.24) | 74.00 | 0.44 (0.22 to 0.88) | 38.00 | NA | NA |
Worldwide | 37 | 0.97 (0.79 to 1.19) | 71.71 | 0.40 (0.30 to 0.53) | 30.41 | 0.06 (0.04 to 0.09) | 4.30 |
*The total of proportion of three causes can be greater than 100% due to some amblyopia had more than one cause.
NA, not applicable.