There is no reason to think this would happen unless it were to be produced, and likely that animal would be a paradox.
Simply one form of leucism is going to override another, regrettably my bio course never covered the term for this and I only learned about it once, when I was asking a similar question to my bio professor to find out about one gene overriding another gene (Albinism over dark hair for example).
Safe to say what happens is one of the genes will block expression of the other, so one of them will show, and the other will not. For example if the black eyed lucy gene were to be genetically "stronger" than the blue eyed lucy gene then black eyes would show, and vice versa.
There is no reason to think both will show (one in one eye and another in the other), this would be an entirely separate genetic trait/fluke.