First-in-Human Trial of a Novel Suprachoroidal Retinal Prosthesis
Figure 9
Impedances for the 600 µm platinum electrodes over time in the three subjects.
Impedances were measured with charge-balanced biphasic current pulses (pulse phase width: 25 µs; amplitude: 75 µA). The dotted lines represent the date of first stimulation. In P1 & P2, the impedances were stable over the implantation and stimulation period. Impedances measured in P3 decreased over the course of the implantation period. Outliers are identified by open circles, and the numbers represent the electrode location (see Fig. 2).