About a decade ago Allen Zderad, a 68-year-old Minnesotan, was diagnosed with retinitis pigmentosa, an incurable disease that attacks your retina, leaving you blind. Now for the first time in 10 years Zderad can see thanks to a pioneering bionic implant. The implant reads and sends light photons to the bionic nerve, going around the damaged retina. The sight is fairly crude, but this is a big step forward toward a possible cure for blindness.