| Group 1 (good stereopsis) N = 21 | Group II (poor stereopsis) N = 17 | p Value | |
| Male (%) | 9 (42.9) | 8 (47.1) | 0.7956 |
| Race (Caucacian) (%) | 18 (90.0) | 11 (73.3) | 0.3670 |
| Age (years): mean (SD) | |||
| At presentation | 4.9 (3.6) | 2.7 (2.5) | 0.0463 |
| At surgery | 6.3 (4.6) | 3.0 (2.5) | 0.0074 |
| At stereopsis | 9.6 (4.5) | 5.6 (1.8) | 0.0008 |