Table 1.
Interocular differences (right eye–left eye) in optical coherence tomography parameters between the right and left eyes (n = 310).
| Right eye | Left eye | P value* | |
|---|---|---|---|
| RNFL thickness (µm) | |||
| Average | 102.7 ± 9.3 (79–144) | 102.2 ± 9.1 (79–136) | 0.070 |
| Quadrant | |||
| Superior | 128.9 ± 14.6 (90–172) | 132.6 ± 16.3 (92–190) | < 0.001 |
| Nasal | 70.1 ± 11.7 (43–114) | 66.5 ± 10.6 (44–108) | < 0.001 |
| Inferior | 131.5 ± 16.7 (86–204) | 131.4 ± 16.3 (89–191) | 0.948 |
| Temporal | 80.6 ± 13.5 (54–164) | 77.9 ± 12.7 (49–155) | < 0.001 |
| ONH parameters | |||
| Rim area (mm2) | 1.45 ± 0.27 (0.90–2.35) | 1.48 ± 2.62 (0.89–2.48) | 0.001 |
| Disc area (mm2) | 2.02 ± 0.39 (1.08–3.30) | 2.06 ± 0.42 (1.22–3.32) | 0.002 |
| Average cup-to-disc ratio | 0.48 ± 0.17 (0.06–0.75) | 0.48 ± 0.17 (0.10–0.80) | 0.709 |
| Vertical cup-to-disc ratio | 0.44 ± 0.16 (0.05–0.70) | 0.43 ± 0.17 (0.05–0.72) | 0.271 |
| Cup volume (mm3) | 0.177 ± 0.161 (0–0.845) | 0.177 ± 0.168 (0–1.064) | 0.954 |
| GCIPL thickness (µm) | |||
| Average | 84.8 ± 4.5 (70–98) | 85.1 ± 4.6 (70–98) | 0.019 |
| Minimum | 82.3 ± 4.3 (71–94) | 82.5 ± 4.4 (70–96) | 0.092 |
| Superotemporal | 83.7 ± 4.9 (70–98) | 83.8 ± 4.7 (71–96) | 0.262 |
| Superior | 85.2 ± 4.9 (68–99) | 85.8 ± 4.9 (69–104) | < 0.001 |
| Superonasal | 86.9 ± 4.6 (70–101) | 87.8 ± 5.0 (69–103) | < 0.001 |
| Inferonasal | 85.6 ± 5.0 (68–101) | 85.3 ± 5.0 (68–102) | 0.150 |
| Inferior | 82.6 ± 5.2 (67–101) | 82.8 ± 5.2 (67–99) | 0.620 |
| Inferotemporal | 84.8 ± 5.3 (72–100) | 84.8 ± 5.1 (71–99) | 0.823 |
Data are presented as mean ± standard deviation (range).
RNFL retinal nerve fiber layer, ONH optic nerve head, GCIPL ganglion cell-inner plexiform layer.
*Paired t test.