Rob Spence, the Eyeborg, is a Canadian filmmaker who lost his right eye in a shotgun accident. Some years later he had a micro-camera installed inside his prosthetic eye. The camera eye was designed by former SpaceX engineer Kosta Grammatis, making Spence a kind of bicyclops, or a new version of Cory Doctorow's little brother.
Spence has since made movies with his eye, he's given a TEDx Talk, and he's been featured in the national news of various countries and on Jimmy Fallon. He also started the Eyeborg Project, where he documents his and other body hacks. At this point the camera is stand-alone and doesn't transmit information to his brain, but that doesn't mean people aren't working on that, including the first subject of the documentary.
One of Spence's more recent projects came about when partnered with the game Deus Ex: Human Revolution. The game's protagonist, Adam Jensen, has a similar camera eye and other prostheses. Spence used that as a launching point to document others like him and Jensen:
I recently traveled around the globe to meet some of today's most advanced cyborgs. I wanted to find out how far we are now from Adam Jensen's prosthetic technology.
Some of the prostheses in the documentary look like they're prototypes from Extant, and with a little paint, could be approaching uncanny valley territory. If you have 12 minutes and the curiosity, his film is worth the watch, with one eye or two.