Table 3.
Baseline Participant Characteristics
| Feature | S1 | S2 | S3 | S4 |
|---|---|---|---|---|
| Gender | Male | Male | Female | Male |
| Age at implant (years) | 47 | 63 | 66 | 39 |
| Eye condition | Retinitis pigmentosa (rod cone dystrophy) | Retinitis pigmentosa (rod cone dystrophy) | Retinitis pigmentosa (rod cone dystrophy) | Retinitis pigmentosa (cone rod dystrophy, diagnosis as infant) |
| Observed nystagmus | Mild | Intermittent | None | Mild |
| Visual acuity | Light perception both eyes | Light perception both eyes | Light perception both eyes | Light perception both eyes |
| Electroretinogram stimulus light threshold (candela secs/m2) | 0.1 | 0.1 | 0.001 | 0.001 |
| Age when legally blind (years) | 20 | 34 | 41 | 13 |
| Approximate years of useful form vision | 34 | 43 | 56 | 19 |
| Primary mobility aid | Cane | Cane | Guide Dog | Cane |
| Implanted eye | Left | Right | Right | Right |