I have a re-attached Retina, donor Cornea but the Iris is torn up and it does not regenerate. No lens. It was shattered.
They tried fitting a high powered contact on it for a while, problem is the eye wondered while it was healing because it wasn't being used (patched). Several eye muscle surgeries didn't help to line it back up. Once the brain dismisses the eye, its adrift forever.
I do see out of the eye but only high contrast objects up to 3-5 ft away. And it kinda gives a ghost image. Life goes on, thats why he gave us 2 eyes !!! Im in my 50's now (and fit), I was 27 when it happened. I thought my world was over... how stupid !