I started getting double vision but it went undiagnosed for too long (GET GOOD EYE DOCTORS) and I somehow, without realizing that the muscles around my left eye were weakening, "trained" my right eye to be the one to stay focused. I'm still kind of trying to get it sorted. Constant annoyance, but it could be worse because I CAN get 20/20 vision (corrected) out of either eye, just they're constantly fighting each other for focus. It's miserable.
I would be willing to bet 99 out of 100 times, a creator does not think deeply enough about when they give a character a prosthetic limb. I swear the closest we've gotten to truly acknowledging recovery is involved was seeing a droid test Luke's sensitivity to his hand in that last moment of Empire. Whenever I see Bucky commit some wild act of strength with his arm I think of the catastrophic harm that would case to whatever human bone or tissue it's anchored to.