He's got a case of cherry eye. Poor baby.
Otis had surgery 8 months ago on his left eye. But his eyes are funny. Just like the black and white patches all over his body, he has one eye that is black and one that is white. This makes the conjuctiva in one eye gray and one pink. Plus he has the classic droopy eye that is common in bulldogs so it exacerbates the look of the black and red.
Eye. Eye. Eye!