2 B v ! 2 B

Two B's or not two B's?

Source: This was actually a question posed to me by my eye doctor. I had a follow-up appointment for my double vision issues yesterday, and one of the tests he does is create a double image for me (using lenses I look through) and then moving those images until my eyes can pull them together into one image. He could do this with any old image from the eye chart, but he appears to prefer using the letter B so he can make that joke. This is the second time he did it. It wasn't particularly funny, but I'm glad he keeps himself amused.