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. Experimental eye drops help blind mice see again.

Experimental eye drops help blind mice see again Science News from research organizations Experimental eye drops help blind mice see again Experimental light-activated eye drops helped restore light perception in blind animals, offering a tantalizing glimpse of a simpler future treatment for degenerative blindness. Together, these disorders affect about 200 million people worldwide and rank among the leading causes of visual impairment and blindness. Beyond the profound effects on independence and quality of life, vision loss also creates a global economic burden estimated at over US$400 billion per year through healthcare expenses and lost productivity.

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 photoreceptors, these surviving cells no longer receive the light signals needed to send visual information toward the brain.

That remaining retinal circuitry has become an important target for scientists trying to restore light sensitivity.