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Lesion location: Anterior versus posterior optic nerve
| NMO | MS | |
|---|---|---|
| Anterior only | 5 (18%) | 9 (33%) |
| Anterior + canalicular | 3 (11%) | 5 (19%) |
| Canalicular only | 1 (4%) | 6 (22%) |
| Canalicular + Posterior | 2 (7%) | 2 (7%) |
| Posterior only | 4 (14%) | 5 (19%) |
|
All 3 regions
(anterior+canalicular+posterior) |
13 (46%) | 0% |
| Bilateral lesions | 7 (25%) | 0 |
| Chiasmal lesions | 7 (25%) | 1 (4%) |
| Optic tract lesions | 5 (18%) | 0 |
