OP, I'm curious as to how you found this out. Did someone tell you and you just believed it? Did the guy see something? I'm legally blind - I have a small amount of vision, but not enough to read most print or get around safely without a cane. Because I can see some things, I get accused of faking my disability all the time. Eyesight isn't binary - there's a whole continuum. It's possible that he's just legally blind or visually impaired.