Visual acuity | ICV not present | ICV present | Â |
6/12 or better | Â | Â | <0.01* |
 Yes | 658 (78.5) | 180 (21.5) |  |
 No | 2 (18.2) | 9 (81.8) | |
6/18 or better | Â | Â | 0.22 |
 Yes | 660 (77.8) | 188 (22.2) |  |
 No | 0 (0) | 1 (100) | |
6/24 or better | Â | Â | - |
 Yes | 660 (77.7) | 189 (22.3) |  |
 No | 0 (0) | 0 (0) | |
 | Right Only | Left Only |  |
Type of ICV | Â | Â | 0.16 |
 Protan | 0 (0) | 2 (100) |  |
 Deutan | 7 (70.0) | 3 (30.0) | |
 Tritan | 49 (64.5) | 27 (35.5) |