Relationships between MRI, OCT and VF findings in patients with tumours affecting the optic chiasm
| Number of tumours | Suprasellar tumour extension, median (range) on MRI | Eyes with OCT findings suggesting optic chiasm compression | Eyes with VF findings compatible with optic chiasm dysfunction | |
| MRI grade I | 7 | 7 mm (6–9 mm) | 3/7 | 0/7 |
| MRI grade II | 12 | 11 mm (7–15 mm) | 3/12 | 3/12 |
| MRI grade III | 7 | 14 mm (11–18 mm) | 4/7 | 3/7 |
| MRI grade IV | 2 | 13 mm (11–15 mm) | 0/2 | 0/2 |
MRI, magnetic resonance imaging; OCT, optical coherence tomography; VF, visual field.