Table 2.
Stimulation Parameters for Each Electrode (or Shorted Pair of Electrodes) in the Finger Pointing and Eye Gaze Phosphene Mapping Tasks
| Stimulation Parameters | ||||||
|---|---|---|---|---|---|---|
| Subject | Phosphene Mapping Task | Electrodes | Time Point (Weeks After Switch-On) | Current (dB Above Threshold) | Stimulation Duration (ms) | Stimulation Frequency (pps) |
| S1 | Finger based | A–F | 5 | 4 | 1000 | 10 |
| Finger based (touchscreen) | A–F | 25 | 4 | 500 | 10 | |
| Gaze based | A–F | 25 | 4 | 500 | 10 | |
| S2 | Finger based | A–F | 3 | 3 | 2000 | 50 |
| Gaze based | A–E | 25 | 4 | 500 | 10 | |
| F | 25 | 6 | 500 | 10 | ||
| S3 | Finger based | A–F | 6 | 1 | 1000 | 50 |
| Gaze based | A–F | 50 | 4 | 500 | 50 | |
Stimulation parameters were selected at the start of each session based on verbal feedback from the subject so as to produce phosphenes that were readily localizable.