Table 4.
Comparison between the published literature and our findings for optic nerve head measurements by HRT I in normal eyes. Results are shown as mean (SD)
| Optic nerve head measurements by HRT I in normal eyes | |||||
| Ghergel et al 7 | Bartz-Schmidt et al 4 | Iester et al 9 | Nakamura et al 18 | Presented data | |
| Number of participants | 157 | 100 | 62 | 77 | 882 |
| Mean age, years (range) | 47.8 (14–77) | 36 (9–67) | 48.9 (NA) | 56 (21–84) | 46.8 (35–70) |
| HRT I software version | 1.12 | 1.11 | 1.11 | 1.11 | 2.01 |
| Disc area (mm2) | |||||
| RE | 1.92 (0.38) | 2.14 (0.48)† | 2.47 (0.67)† | 2.15 (0.50)‡ | 1.83 (0.39) |
| LE | 1.90 (0.37) | 1.81 (0.40) | |||
| Cup area (mm2) | |||||
| RE | 0.49 (0.26) | 0.63 (0.42)† | 0.73 (0.46)† | 0.55 (0.42)‡ | 0.44 (0.32) |
| LE | 0.47 (0.28) | 0.44 (0.32) | |||
| Cup:disc area ratio | |||||
| RE | 0.24 (0.10) | NA | 0.28 (0.14)† | 0.24 (0.14)‡ | 0.22 (0.13) |
| LE | 0.23 (0.11) | 0.22 (0.13) | |||
| Rim area (mm2) | |||||
| RE | 1.43 (0.28) | 1.51 (0.37)† | 1.76 (0.53)† | 1.59 (0.34)‡ | 1.39 (0.27) |
| LE | 1.42 (0.25) | 1.37 (0.27) | |||
| Mean RNFLT (mm)* | |||||
| RE | 0.245 (0.06) | NA | 0.26 (0.10)† | 0.250 (0.080)‡ | 0.263 (0.066) |
| LE | 0.270 (0.06) | 0.252 (0.065) | |||
| Rim volume (mm3) | |||||
| RE | 0.37 (0.12) | NA | 0.49 (0.29)† | 0.44 (0.15)‡ | 0.38 (0.13) |
| LE | 0.40 (0.13) | 0.36 (0.12) | |||
*Mean retinal nerve fibre layer thickness (HRT).
†Randomised selection of measured eyes.
‡Means for both eyes not available.
NA, not available.