In the hope of countering any black thoughts, I'll just mention Col Stapp again. Giggle him in his decelleration research in 1946. 600 mph down to zero in 1.4 sec...some 46 g a world record. He came off the trolley with "Eyes engorged with blood." and not for the first time.
The point about this is he seemed to make a full recovery after causing serious internal bleeding.
If you add to this, the progress of modern surgery such as my neighbor's example. Just been given a new cornea after 50 years of not using the eye. It's taking time, but his brain is adjusting. Total miracle.
Interocular lenses are of course replaced as a matter of routine.
This all adds up to not losing hope even if it doesn't make a full recovery at this stage. Still, I hope it doesn't come to any of these backup scenarios. Neither of my friends could see to drive, but they're both fine now.