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Ocular pulse amplitude (mm Hg)
| OPA | Median | Min | Max | First quartile (25%) | Third quartile (75%) | Mean value | SD |
| POAG (n=20) | 3.8 | 1.3 | 9.6 | 3.1 | 5.1 | 4.3 | 1.9 |
| NTG (n=20) | 3.0 | 1.5 | 4.2 | 2.1 | 3.5 | 2.8 | 0.9 |
| OHT (n=20) | 4.9 | 2.7 | 8.8 | 3.8 | 7.3 | 5.3 | 1.9 |
| Control (n=20) | 3.9 | 2.1 | 7.8 | 2.6 | 5.8 | 4.3 | 1.7 |
