I think the picture is the answer to your question... which is a question about the picture... which answers your question... which originally QUESTIONED THE PICTURE ITSELF... WHICH RESPONDS TO YOUR QUESTION BEFORE YOUR QUESTION WAS EVEN ASKED...
Maybe he also use lenses, that's possible. But if he is wearing glasses on this picture, and not when he plays (check the other pictures) it might mean that he can see things when it's close but he can't see things when it's far. If Demon sees your question then he'll answer.
I can not see good from afar. I don't need glasses to play because I'm standing so close to the screen. Also I don't wear lenses, I tried once for 4 hours and I could not for the life of me put that shit on my eye so I eventually dropped that idea.
I only wear glasses when I need to. Which is funny because sometimes I appear to be ignoring people on the streets or whatever when really I just can not recognize them until they're relatively close. Unless they're easily recognizable. Just the faces are kinda blurry. Must say it's quite embarassing at times. Has happened more than once that I waved to people I don't even know. It's funny when they wave back though, which is very rare. :D