I fly r/c sailplanes heavily, and my friend/mentor was flying with us one day at a semi-secret spot. "Hey.." he said "Somethings...somethings going on with my eye"
His retina had just collapsed. He had numerous surgeries, staplings, laser treatments and so on for a year. Nothing worked. He finally had to live with the loss of the vision in that eye. He's still the hottest (not to mention crankiest) pilot on our hill, and flies combat with one eye better than I do using two eyes.
My hat's off to people who don't take it lying down.