Cell transplantation ( stem cells) are being study to see if they can return daylight to the blind. The successful transplantation of cone-like photoreceptors into the retina of recipient mice with disrupted daylight vision was successful. It is being done on mice only at this time.-MDA
Degeneration or loss of the light-sensitive cells of the retina, the so-called photoreceptors, inevitably leads to vision impairment and blindness with no curative therapy currently available. On of the main causes for disability in industrialized societies is the loss of cone photoreceptors that are responsible for daylight vision.
Human daylight vision depends on cone photoreceptors and their degeneration results in severe visual impairment as observed in several eye diseases including age‐related macular degeneration, cone‐rod dystrophies, or late stage retinitis pigmentosa. The adult mammalian retina, including humans, does not intrinsically regenerate and thus dying photoreceptors result in permanent vision loss with no treatments currently available. Several therapeutic approaches are currently being developed to treat retinal degenerative diseases………
Source: Health Canal