Top comment has a good positive example but if you want another example of success, apparently the head of global macro at citadel hedge fund is blind as well, I don't know if he's still there. There was a story about him from before when he was working at standard chartered as a fx trader blind. He had a similar impairment where he was losing his vision and used the time in between to train himself to work and visualize graphs from data read out to him or something like that