>a very low-resolution semblance of the world represented by glowing white-yellow dots and shapes. >When the implant is inserted, the electrodes pierce the surface of the brain; when it’s removed, 100 tiny droplets of blood form in the holes. >The big downside to the prosthesis—and the primary reason Gómez couldn’t keep hers beyond six months—is that nobody knows how long the electrodes can last without degrading either the implant or the user’s brain. “The body’s immune system starts to break down the electrodes and surround them with scar tissue, which eventually weakens the signal,” Fernandez says. There’s also the problem of the electrodes flexing as someone moves around. >At 10 pixels by 10 pixels, which is roughly the maximum potential resolution Gómez’s implant could render, one may perceive basic shapes like letters, a door frame, or a sidewalk. But the contours of a face, let alone a person, are far more complicated. Not exactly there yet are we?