Table 3.
Prevalence of Unilateral and Bilateral Amblyopia by Potential Causes
| Amblyopia Type | African (n = 4234) |
Nepali (n = 4802) |
Malay (n = 3250) |
Indian (n = 10 770) |
Chinese (n = 11 002) |
Hispanic (n = 5263) |
All (n = 39 321) |
|---|---|---|---|---|---|---|---|
| Unilateral | 10 (0.24%) | 16 (0.33%) | 13 (0.40%) | 56 (0.52%) | 85 (0.77%) | 66 (1.25%) | 246 (0.63%) |
| Anisometropic* | 3 (0.07%) | 12 (0.25%) | 7 (0.22%) | 29 (0.27%) | 60 (0.55%) | 37 (0.70%) | 148 (0.38%) |
| Strabismic* | 4 (0.09%) | 4 (0.08%) | 4 (0.12%) | 18 (0.17%) | 10 (0.09%) | 16 (0.30%) | 56 (0.14%) |
| Mixed strabismic-anisometropic* | 1 (0.02%) | 0 (0.00%) | 2 (0.06%) | 7 (0.07%) | 7 (0.06%) | 10 (0.19%) | 27 (0.07%) |
| Hyperopia only | 2 (0.05%) | 0 (0.00%) | 0 (0.00%) | 2 (0.02%) | 8 (0.07%) | 3 (0.06%) | 15 (0.04%) |
| Bilateral | 2 (0.05%) | 1 (0.02%) | 4 (0.12%) | 11 (0.10%) | 17 (0.15%) | 9 (0.17%) | 44 (0.11%) |
| Total | 12 (0.28%) | 17 (0.35%) | 17 (0.52%) | 67 (0.62%) | 102 (0.93%) | 75 (1.43%) | 290 (0.74%) |
Data are presented as number (%) of children with amblyopia.
*
Cases with coexisting hyperopia were included in these categories.