it was a pup he got and his house dog jumped on it and messed his eye up.
We had a pup a while back that had his eye scratched from a dog jumping on him, it turned white/blue. I was afraid he was going to be blind but it cleared up a few months later and he sees fine so maybe you will get lucky!
My husband had a rednose once that had only one eye and he used him for years with no problems.