We are interested in this ourself
the brain, apparently, is a big spongey usb port...if you have lost an eye, they can connect a camera to it. it will start translating the data it recieves and will eventually give you vision....not only in the normal spectrum...but also everything the camera is designed to pick up...infrared xray etc....i really dont know how true that is, but the fact that the big companies are looking at it means theres probly some truth there.
Our brains already pick up junk signals now from the stuff thats chucked out by radios, bluetooth, phones, tvs etc...which would go someways to explaining why some people do weird things now and again and dont know why. essentially tho, if this is true about looking at the brain....it wont be long until our thoughts will be controlled from outside....oh hang on thats already happening isnt it?!?