Prevalence of amblyopia and strabismus in different studies
| Study | Country | Age, years (n) | Ethnicity | Prevalence of amblyopia* | Prevalence of strabismus |
| MEPEDS, 2008 | USA | 2.5–6 (3350) | African American (1663) Hispanic/Latino (1687) | 1.5% 2.6% | 2.5% 2.4% |
| MEPEDS, 2013 | USA | 2.5–6 (1883) | Asian American (938) Non-Hispanic White (945) | 1.8% 1.8% | 3.6% 3.2% |
| BPEDS, 2009 | USA | 2.5–6 (1546) | Non-Hispanic White (673) African American (873) | 1.8% 0.8% | 3.3% 2.1% |
| STARS, 2010 | Singapore | 2.5–6 (1682) | Singaporean Chinese | 1.2% | 0.8% |
| SPEDS, 2012 | Australia | 2.5–6 (1422) | Predominantly white | 1.9% | N/A† |
| NPVP, 2015 | China | 3–6 (5667) | Chinese Han | 1.2% | 5.7% |
| ACES, 2014 | China | 6–9 (2893) | Chinese Han | 1.0% | N/A† |
| YPEDS, 2018 | China | 3–4 (1695) | Chinese Han | 1.47% | N/A† |
| MMPS, 2018 | China | 7–8 (1656), 13–14 (1394) | Chinese Hani | 0.82% | 1.93% |
*Same definition of amblyopia was used.
†No strabismus data.
ACES, Anyang Childhood Eye Study ; BPEDS, Baltimore Paediatric Eye Disease Study; MEPEDS, Multi-ethnic Paediatric Eye Disease Study; MMPS, Mojiang Myopia Progression Study; NPVP, Nanjing Paediatric Vision Project; SPEDS, Sydney Paediatric Eye Disease Study; STARS, Strabismus, Amblyopia, and Refractive Error in Singaporean Children Study ; YPEDS, Yuhuatai Paediatric Eye Disease Study.