Figure 1.
Prevalence of amblyopia in different ethnic groups based on different criteria. *Best-corrected visual acuity (BCVA) ≤20/40 with ≥1 potential causes: (1) esotropia, exotropia, or vertical tropia at 4 m fixation, or esotropia or vertical tropia at 0.5 m; (2) anisometropia ≥2.00 diopters (D) spherical equivalent (SE); (3) ametropia ≥6.00 D SE. **BCVA ≤20/ 40 in the worse eye and interocular difference (IOD) <2 lines, or BCVA ≤20/40 in both eyes and IOD <2 lines. RESC = Refractive Error Study in Children.