Table 4. Interobserver reproducibility of average disc diameter, retinal nerve fiber layer thickness, rim thickness, lamina cribrosa depth, prelamina tissue thickness, and average lamina cribrosa thickness measurements in all eyes.
| Characteristic | Mean value | Observer 1 (mean ± SD) |
Observer 2 (mean ± SD) |
ICC | 95% CI |
|---|---|---|---|---|---|
| Average disc diameter | 1511.1 ± 98.9 | 1509.0 ± 131.0 | 1515.0 ± 115.7 | 0.863 | 0.820–0.896 |
| Average neuro-retinal rim thickness | 215.1 ± 49.7 | 220.1 ± 57.3 | 210.1 ± 49.9 | 0.972 | 0.963–0.979 |
| Average lamina cribrosa depth | 465.9 ± 94.0 | 472.2 ± 94.1 | 459.6 ± 96.5 | 0.833 | 0.781–0.873 |
| Average prelaminar thickness | 176.0 ± 29.0 | 174.9 ± 31.0 | 177.1 ± 29.0 | 0.927 | 0.904–0.945 |
| Average lamina cribrosa thickness | 198.6 ± 41.1 | 201.7 ± 36.9 | 195.5 ± 48.8 | 0.891 | 0.856–0.917 |
CI, confidence interval; ICC, intraclass correlation coefficient; SD, standard deviation.