Visual function and colour contrast sensitivity performance by group
| Control n=57 | NE-AMD n=45 | E-AMD n=42 | |
| Black 100% logMAR, mean (SD) | 0.30 (0.25) | 0.65 (0.38) †*** | 1.00 (0.52)†***,‡*** |
| Black 100% Snellen equivalent | 20/40 | 20/100 †*** | 20/200†***,‡*** |
| Black 75% letters correctly identified, mean (SD) | 9.0 (1.6) | 9.6 (0.8) | 8.3 (2.7)‡* |
| Blue 100% letters correctly identified, mean (SD) | 8.6 (1.3) | 9.3 (1.3) | 8.0 (2.9)‡* |
| Blue 75% letters correctly identified, mean (SD) | 8.6 (1.9) | 9.0 (1.3) | 7.9 (3.0)‡* |
| Blue 50% letters correctly identified, mean (SD) | 8.0 (2.6) | 8.5 (1.9) | 6.3 (4.1)†*,‡** |
| Yellow 100% letters correctly identified, mean (SD) | 7.8 (2.9) | 7.7 (3.2) | 5.5 (4.3)†**,‡* |
| Yellow 75% letters correctly identified, mean (SD) | 6.8 (3.4) | 6.5 (3.9) | 4.6 (4.3)†* |
| Total blue letters correctly identified, mean (SD) | 30.4 (8.2) | 32.6 (6.9) | 27.4 (12.0)‡** |
| Total yellow letters correctly identified, mean (SD) | 22.1 (11.1) | 20.6 (11.5) | 15.5 (14.3)‡* |
*P<0.05; **p<0.01; ***p<0.001
†Significantly worse than control.
‡Significantly worse than NE-AMD.
E-AMD, exudative age-related macular degeneration; NE-AMD, non-exudative age-related macular degeneration.