Joe makes friends wherever he goes, and people (especially kids) always say he looks like someone famous.
Here are the comparisons we hear most:
I think Patrick picked the best one, back when Joe first got glasses. Egghead, from the old Foghorn Leghorn cartoons:
Speaking of cartoon characters with glasses, I was surprised to open the paper a few weeks ago and see Linus from Peanuts sporting a pair of specs. I looked it up, and it turns out Charles Schulz had Linus in glasses for part of 1962. After a few months, he removed them again.