But its the way they're doing the rescue that matters. AAV delivering a green opsin gene into ganglion cells which normally _would_not_have_ expressed or used t

But its the way they're doing the rescue that matters. AAV delivering a green opsin gene into ganglion cells which normally _would_not_have_ expressed or used that gene. Its supposed to be the cone photoreceptor cells that use that gene. So this isn't just replacing a knocked our gene, its a true 'hack', utilising other cells that are easier to target.