Fig. 12.

Representative waveforms of stimulus artifacts from wirelessly driven retinal microstimulators in Yucatan minipigs at 0, 2, 6, and 12 weeks postoperation. The “control” waveform was collected when transmitted power to the implant was reduced below the threshold that was required for stimulation to begin. The potential scale (in millivolts) is only relative, as the readings were highly sensitive to changes in the position of the contact lens electrode. Time scale: 1 ms/division.