When I enlarge the first photo, it looks like he has part of a retained eye cap. Like, Pythonfriend said, it's really nothing to worry about unless several of them start to build up. As long as you keep your humidity correct, there is a very good chance it will come off with the next shed.

You can try the pillow case trick, just to see if he can knock it off on his own. If that doesn't work, I wouldn't mess with it at all. Nature will take its course, and it should come off with the next shed.