Ever read the Ender's Game series? The guy was blind, so they implanted an mechanical nano-eyeball. It can record, and can interface to a computer and such like that. I'm sure another version of that same eye could have a wireless interface with computers, video game consoles(for the ultimate experience) and since it's processing and sending images to your eyes, it could of course modify those images(HUB), not to mention perfect vision. If people continue to deny research(i.e. stem cell) we will probably never have biomechanical devices like that, though.