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. Author manuscript; available in PMC: 2020 Aug 24.
Published in final edited form as: IEEE Trans Biomed Eng. 2009 Apr 28;56(10):2502–2511. doi: 10.1109/TBME.2009.2021401

Fig. 2.

Fig. 2.

Engineering design of the subretinal microstimulator system. (a) Implanted components are built on a flexible, polyimide substrate. After assembly, the entire unit is coated in poly(dimethylsiloxane) except for the stimulating array and the current return electrode. The overall dimensions of the device are 12 mm × 31 mm. (b) Schematic diagram showing wireless operation of the visual prosthesis system. A camera (or external computer) and transmitter collect and then rebroadcast an image signal to the implanted stimulator chip, which is commanded to retransmit biphasic current pulses, in patterns corresponding to the desired image, to the stimulating electrode array located in the subretinal space.