Scientists have been struggling to fight retinal degeneration in an elegant way. The most practical solution so far involves external devices that send wires to the back of your eyes. There might be a much more graceful approach before long, however. Researchers have developed an implant whose light-sensitive material could at least partially restore retinas and preserve your eyesight. Their invention combines a biocompatible substance (in this case, silk) with a conductive polymer and an organic semiconductor to send electricity to nerve cells whenever the implant is subjected to typical environmental light. Previous attempts at photovoltaic devices like this have required either exceptionally bright light or unusual light wavelengths to work, so this would be far more practical in the real world.