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. 2019 Jun 22;10(6):419. doi: 10.3390/mi10060419

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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(a) The configuration of one of the very first patient tests [57]; (b) implanted 16-channel electrode array of Argus I [7]; (c) electrode array of Argus II implant containing 60 electrodes [66]; (d) an epiretinal stimulator with a thin-film polyimide cable of gold traces [59]; (e) 126-channel electrode implanted in the eyes of mini-pigs by our group; (f) 1025-channel electrode fabricated by our group [64,65]. Reproduced from the mentioned references with permission from the related journals.