Comparison of typical clinical features in IIH and VIIP
| IIH | VIIP | |
|---|---|---|
| Finding | ||
| Increased intracranial pressure | ✓ | Mildly elevated postflight; in-flight ICP unknown |
| Papilledema | ✓ | ✓ |
| Globe flattening | ✓ | ✓ |
| Choroidal folds | ✓ | ✓ |
| Hyperopic shifts | ✓ | ✓ |
| Chronic headaches | ✓ | |
| Diplopia | ✓ | |
| Transient visual obscurations | ✓ | |
| Pulse-synchronous tinnitus | ✓ | |
| Sixth cranial nerve palsy | ✓ | |
| Patient characteristics | ||
| Obesity | ✓ | |
| Sex predominance | Female | Male |
| Imaging findings | ||
| Optic nerve head protrusion | ✓ | ✓ |
| Flattened posterior globe | ✓ | ✓ |
| Enlarged optic nerve sheath | ✓ | ✓ |
| Optic nerve tortuosity | ✓ | ✓ |
| Empty sella | ✓ | ✓ |
Note:—✓ indicates clinical feature present.