this is such a horrifying prospect, the consequences of which are best summarized by this paragraph:

These three patients, and more than 350 other blind people around the world with Second Sight’s implants in their eyes, find themselves in a world in which the technology that transformed their lives is just another obsolete gadget. One technical hiccup, one broken wire, and they lose their artificial vision, possibly forever. To add injury to insult: A defunct Argus system in the eye could cause medical complications or interfere with procedures such as MRI scans, and it could be painful or expensive to remove.