Characteristics of the patients
| Variable | Mean | (SD) | Range |
| Age (years) | 61.5 | 10.9 | 35.0–80.0 |
| IOP (mm Hg) | 14.8 | 3.5 | 11.0–24.0 |
| Visual acuity (BCVA) | 0.85 | 0.20 | 0.5–1.0 |
| Visual field (MD) | −2.93 | 2.13 | −9.74–1.09 |
| Visual field (PSD) | 14.72 | 7.43 | 4.27–34.14 |
| GDx–VCC (NFI) | 33.1 | 18.3 | 11.0–77.0 |
| Central corneal thickness | 560.8 | 30.3 | 503.0–600.0 |
| Systolic blood pressure (mean) | 116.4 | 8.4 | 90.0–160.0 |
| Diastolic blood pressure (mean) | 68.2 | 9.8 | 40.0–85.0 |
| Heart rate (per min) | 71.3 | 11.8 | 56.0–100.0 |
BCVA, best corrected visual acuity; MD, mean deviation; PSD, pattern standard deviation; NFI, nerve fibre index.