Well I hope it's a *bit* faster than that, since it looks (haha) like I'm going to get MD later in life just like my Dad.
I have the same worry. So far I'm doing OK (and taking my vitamin A) but it's still a worry.
(I also worry that, with the increasing governmental takeover of medicine, research on and deployment of new treatments will grind to a halt as a cost-cutting measure.)
I really wish we could the body itself to grow these cells, since obviously it was able to do it once before.
If you follow this link from TFA, you'll find that (as of last January) they've also been able to inject "precursor" cells into blind mice and get them to grow a new, fully differentiated, and possibly fully functional, retina in about two weeks.
(I presume by "precursor cells" they mean "stem cells that have been partially differentiated into pluripotent cells along the developmental path to retina tissue" or perhaps "harvested pluripotent cells from the same developmental stage".)
The new retina tissue definitely connected well enough to produce behavioral evidence of light sensitivity, though more work was needed to determine whether/how well it hooked up to the brain's image processing.