Retrobulbar optic nerve dimensions for control, glaucoma, and ocular hypertensive eyes
| Optic nerve measurement | Control group (n=90) | Glaucoma group (n=49) | OHT group (n=17) | p Value |
|---|---|---|---|---|
| Diameter (mm): | ||||
| mean (SD) | 2.98 (0.36) | 2.58 (0.50) | 3.02 (0.36) | Control/Gl: <0.0001 |
| range | 2.21–3.92 | 1.62–3.74 | 1.8–3.84 | Control/OHT: =0.66 |
| OHT/Gl: =0.01 | ||||
| (n=21) | (n=49) | (n=17) | p Value | |
| Cross sectional area (mm2): | ||||
| mean (SD) | 8.25 (1.67) | 6.68 (2.58) | 8.86 (2.08) | Control/Gl: =0.004 |
| range | 5.7–11.2 | 2.87–13.43 | 4.9–12.5 | Control/OHT =0.57 |
| OHT/Gl: =0.006 | ||||
OHT = ocular hypertension; Gl = glaucoma.