Table 2.
Suspected risk factors for failure of treatment for anisometropic amblyopia among children aged 3 to 8 years of age
| Characteristic | No. (%) of patients | No. (%) relative failure* | No. (%) functional failure† |
|---|---|---|---|
| Age ≥6 years | 25 (24) | 8 (32) | 18 (72) |
| Concurrent strabismus | 66 (63 ) | 20 (30) | 34 (51) |
| SERE amblyopic eye ≥3.00 D | 70 (67) | 18 (26) | 30 (43) |
| Cylinder of amblyopic eye ≥ 1.50 D | 30 (29) | 13 (43) | 19 (63) |
| Interocular SERE difference ≥4.00 D | 22 (21) | 5 (23) | 12 (54) |
| Initial visual acuity of amblyopic eye of 20/200 or worse | 35 (34) | 7 (20) | 25 (71) |
| Suboptimal treatment compliance | 23 (22) | 12 (52) | 14 (72) |
| Myopia | 23 (22) | 8 (35) | 12 (52) |
D, diopters; SERE, spherical equivalent refractive error.
*
Relative failure means failure of visual acuity to improve by at least 3 logMAR lines in the amblyopic eye.
†
Functional failure means failure to achieve a final visual acuity of 20/40 or better in the amblyopic eye.