Actually, the retina is one of the few places that gene therapy has been really successful. Adeno associated virus can be injected, and it has a fairly conserva

Actually, the retina is one of the few places that gene therapy has been really successful. Adeno associated virus can be injected, and it has a fairly conservative safety profile (for instance, it doesn't normally integrate into the genome). https://en.wikipedia.org/wiki/Gene_therapy_of_the_human_retina https://en.wikipedia.org/wiki/Gene_therapy_of_the_human_reti... is a good place to start.