Table 1. Cohort characteristics.
| Characteristic | Number of patients |
|---|---|
| Gender | |
| Male | 17 |
| Female | 8 |
| Age group | |
| <4 years | 4 |
| 4–10 years | 9 |
| 11–20 years | 6 |
| >20 years | 6 |
| Visual acuity | |
| ≤0.3 and ≥0.05 | 24 |
| <0.05 | 1 |
| Fixation abnormalities | |
| Yes | 13 |
| No | 12 |
| Visual field defects | |
| Yes | 17 |
| No | 8 |
| Developmental delay and/or intellectual disability | |
| Yes | 25 |
| No | 0 |
| Able to walk independently | |
| Yes | 15 |
| No | 10 |
| Speak words | |
| Yes | 12 |
| No | 13 |
| Microcephaly (<3rd centile) | |
| Yes | 4 |
| No | 20 |
| Unknown | 1 |
| Macrocephaly (>97th centile) | |
| Yes | 3 |
| No | 21 |
| Unknown | 1 |
| Abnormality on brain MRI | |
| Yes | 14 |
| No | 8 |
| Not assessed | 3 |
| Epilepsy | |
| Yes | 9 |
| No | 16 |
| Hearing loss | |
| Yes | 1 |
| No | 23 |
| Unknown | 1 |