Scientists in Britain have successfully implanted a rudimentary bionic eye in two patients.
At this stage the eye mainly identifies light and dark areas and lets the users see large objects.
But for many people even that level of vision will be a huge improvement.
Nerd sidenote: I believe that the main condition the researchers are hoping to treat - retinitis pigmentosa - is the one which affects comics artist John Totleben.
It's probably many years away but it'd be great if he one day recovered his full vision.