Story has so many holes, doesn't make sense. He can't seen but he can see to fix cars. He couldn't see his cousin still his tools but again he is able to see to fix cars? My head is gonna explode bc I can't make any sense of this. Sounds like portions of this story is made up.
He maybe visually impaired. I work with the blind and visually impaired. We teach them how to make a living with none or limited eye sight. You will be surprised by what they can do.