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. 2018 Sep 5;12:584. doi: 10.3389/fnins.2018.00584

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Copyright © 2018 Farvardin, Afarid, Attarzadeh, Johari, Mehryar, Nowroozzadeh, Rahat, Peyvandi, Farvardin and Nami.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The Argus II Retinal Prosthesis System consists of implanted and external components. The implant is an epiretinal prosthesis that includes a receiver, electronics, and an electrode array that are surgically implanted in and around the eye. The array has 60 electrodes arranged in a rectangular grid, of which 55 are enabled. It is attached to the retina over the macula with a retinal tack. The external equipment includes glasses, a video processing unit (VPU) and a cable. The glasses include a miniature video camera, which captures video images, and a coil that transmits data and stimulation command to the implant. The VPU converts the video images into stimulation commands and is body-worn. The cable connects the glasses to the VPU. The Argus II System operates by converting video images into electrical energy that activates retinal cells, delivering the signal through the optic nerve to the brain where it is perceived as light. The Argus II Clinician Fitting System (CFS) and Psychophysical Test System (PTS) are used in the clinic to test and program the Argus II Implant and external equipment. Figure and description adapted with permission from Second Sight Inc. Data on File, April 2018.