I think all the normal teasing advice applies--he's old enough to learn that what he thinks of himself shouldn't be based on what classmates think of him.
Beyond that, talk with the teacher about moving him to the back of the classroom. That's what did it for me--I couldn't read the board clearly, so having glasses that allowed that was a huge relief. Got rid of my headaches from squinting, too!
Beyond that, talk with the teacher about moving him to the back of the classroom. That's what did it for me--I couldn't read the board clearly, so having glasses that allowed that was a huge relief. Got rid of my headaches from squinting, too!