Eye drops that restored sight in blind mice
A research consortium led by the Institute for Bioengineering of Catalonia has built a new class of light-activated small-molecule drugs that restored light perception and visually guided behavior in blind mice, and did it without gene therapy, an implant, or special lighting 2.
The compounds essentially take over the job photoreceptors used to do, waking up retinal circuitry that survives even after the light-sensing cells themselves have died. Two of the most promising versions worked as simple eye drops, delivered the same way you'd treat pink eye 2.
