Mean Lea symbol acuity (LS), crowded Lea symbol acuity (CLS), Landolt C acuity (LC), and crowded Landolt C acuity (LC2.6 ) of the “better” eyes (90 children re-examined in the hospital), cooperation (both eyes monocularly), children older than 30 months without cooperation, and interocular acuity differences >1 line
| Test | Mean | Cooperation/rate | Age >30 months non-cooperative | Difference >1 line |
|---|---|---|---|---|
| LS | 0.94 | 69 (77%) | 2 | 6 (9%) |
| CLS | 0.82 | 51 (57%) | 5 | 5 (10%) |
| LC | 0.82 | 43 (48%) | 13 | 8 (19%) |
| LC2.6 | 0.63 | 40 (44%) | 17 | 6 (15%) |