Table 1.
Summary of baseline characteristics of test-retest subjects
| Mean | SD | Range | |
| Age (years) | 68.2 | 10.2 | 20.4–84.8 |
| Mean deviation (dB) | −2.2 | 2.4 | −11.3–1.3 |
| Disc area (mm2) | 1.9 | 0.4 | 1.0–3.4 |
| Baseline rim area (mm2) | 1.2 | 0.4 | 0.4–2.2 |
| Spherical power (dioptres) | −0.2 | 2.8 | −7.7–5.0 |
| Cylindrical power (dioptres) | 1.0 | 0.8 | 0–4.2 |
| Spherical equivalent (dioptres) | 0.4 | 2.7 | −7.4–5.7 |
| LOCS III nuclear opalescence | 2.2 | 0.9 | 0.4–5.3 |
| LOCS III nuclear colour | 2.0 | 0.8 | 0.3–5.1 |
| LOCS III posterior subcapsular | 0.4 | 0.5 | 0.1–3.8 |
| LOCS III cortical | 0.8 | 1.0 | 0.1–3.8 |
| Central nuclear dip | 17 | 3 | 12–29 |
| MPHSD (HRT) | 31 | 22 | 11–121 |
| MPHSD (HRT-II) | 27 | 21 | 10–106 |
HRT = Heidelberg retina tomograph; LOCS III = Lens Opacity Classification System III; MPHSD = mean pixel height standard deviation.