Table 1.
Mean (SD) optic disc measurements by HRT I in normal eyes, median, range, and mean (SD) individual difference between right and left eye (RE–LE) and significance (Wilcoxon test)
| 882 participants, 1764 normal eyes | ||||||||
| Right eyes | Left eyes | Difference RE–LE | ||||||
| Mean (SD) | Median | Range | Mean (SD) | Median | Range | Mean (SD) | p Value | |
| Disc area (mm2) | 1.83 (0.39) | 1.80 | 0.64–3.25 | 1.81 (0.39) | 1.77 | 0.88–3.77 | +0.017 (0.295) | 0.04 |
| Cup area (mm2) | 0.44 (0.32) | 0.39 | 0–1.80 | 0.44 (0.32) | 0.37 | 0–1.84 | +0.004 (0.204) | 0.64 |
| Cup:disc area ratio | 0.22 (0.13) | 0.23 | 0–0.69 | 0.22 (0.13) | 0.22 | 0–0.69 | +0.0001 (0.094) | 0.85 |
| Rim area (mm2) | 1.39 (0.27) | 1.36 | 0.46–2.57 | 1.37 (0.27) | 1.35 | 0.48–2.92 | +0.014 (0.271) | 0.29 |
| Mean RNFLT (mm)* | 0.263 (0.066) | 0.26 | 0.01–0.53 | 0.252 (0.065) | 0.25 | 0.01–0.53 | +0.011 (0.065) | <0.001† |
| Rim volume (mm3) | 0.38 (0.13) | 0.36 | 0.04–1.36 | 0.36 (0.12) | 0.35 | 0.05–0.94 | +0.019 (0.128) | <0.001† |
*Mean retinal nerve fibre layer thickness (HRT).
†Significant.