If retinal is dead as you meaning totally functionless ther is no way to treat it.
. There is no way to reverse or to treat retinal degeneration, or the total loss of vision that inevitably accompanies it. Progressive retinal atrophy will eventually result in blindness ..
A more recent use of retroreflectors, helping to provide secure communications between two stations in line of sight, is modeled after the combination of tapetum lucidum
If your vision is not possible you can see if a transplant can help