Hi Snoodle,
My first kitty, Sydney was all white with one blue eye and one green. Sydney was completely deaf. I was really upset when I found out, but as Karen and Wolflady pointed out, with lots of love they can live very happy, healthy lives. The only thing I made sure of was that he never went outdoors. We lived on a very busy street, and without his hearing, we didn't think he should go out. Now I know that it's better for them to be indoors, anyway.
Cats are very resourceful creatures and Sydney's handicap never slowed him down! On the contrary, he was very playful and very vocal, especially when it was time for me to feed him. He might have been deaf, but there was certainly nothing wrong with his tummy-clock!!