Experimental eye drops help blind mice see again

Scientists have created light-activated drugs that helped blind mice perceive light again and restored visually guided behavior without gene therapy, implants, or specialized lighting. Even more intriguingly, two of the most promising compounds worked when administered as eye drops, pointing toward a potentially simple new approach to restoring vision. In these diseases, the retina's photoreceptor cells, which detect incoming light, gradually deteriorate and die. Yet much of the neural circuitry deeper within the retina can remain intact and capable of functioning. The problem is that, without phot... [7727 chars]