To the Neitzes, this opened the door to curing the condition in humans, too. But curing the monkey required retinal surgery, which is a risky procedure. In an attempt to develop a non-surgical alternative, the researchers are looking to a technique developed at University of California Berkeley that would allow them to inject a substance carrying the corrective genes into the vitreous--the thick transparent liquid that fills most of the eye. By partnering with Avalanche Biotechnologies, the researchers hope that they can use that technique to bring the same genes to the retina without surgery. They hope to start testing their treatment on human subjects in the next couple of years.