Visual symptoms at onset (n = 22)
| Visual symptom | Number of patients (n = 22)* |
|---|---|
| *One patient experienced both impaired colour vision and visual distortions at onset. | |
| Decreased visual acuity | 8 |
| Blurred vision | 6 |
| Peripheral visual field defect | 2 |
| Visual distortions | 3 |
| Impaired colour vision | 2 |
| Palinopsia | 1 |
| Tunnel vision | 1 |