Central retinal artery haemodynamics by colour Doppler imaging
| Bimatoprost | Bimatoprost+dorzolamide | |
| Central retinal artery | ||
| Peak systolic velocity (cm/s) | ||
| 18:00 | 10.0±2.3 | 11.0±2.3 |
| 22:00 | 10.3±2.8 | 10.3±2.2 |
| 2:00 | 9.5±2.3 | 9.9±2.3 |
| 4:00 | 9.4±2.4 | 10.0±2.6 |
| 6:00 | 8.8±1.9 | 9.8±3.0 |
| p Value | 0.5423 | |
| End-diastolic velocity (cm/second) | ||
| 18:00 | 3.4±1.0 | 3.6±1.1 |
| 22:00 | 3.4±1.1 | 3.5±1.2 |
| 2:00 | 3.5±1.2 | 3.3±1.1 |
| 4:00 | 3.2±1.1 | 3.2±1.2 |
| 6:00 | 2.8±0.9 | 3.0±1.4 |
| p Value | 0.6246 | |
| Resistance index | ||
| 18:00 | 0.655±0.082 | 0.675±0.066 |
| 22:00 | 0.667±0.065 | 0.674±0.078 |
| 2:00 | 0.640±0.058 | 0.668±0.079 |
| 4:00 | 0.654±0.066 | 0.680±0.074 |
| 6:00 | 0.680±0.075 | 0.682±0.081 |
| p Value | 0.6375 | |
No change in best corrected visual acuity was found between study visits.