Lesser/Butters have eye issues that are genetic in certain combos.

Super Lesser/Butters are known to have bug eyes - bulging eyes that stick outta their head. it doesn't affect their health tho, just looks funky.

Lesser/Butter Piebalds also have genetic eye issues. in this combo, they tend to have smaller than average eyes. again it looks funky.

and then there was this BEL (http://ball-pythons.net/forums/showt...nsiderd-a-myth) which i think is a Super Lesser/Butter with a missing right eye and two pupils in the left eye. freaky!