Have you taken your frog to the vet ? Has it progressed ? I have a frog with lipidosis (build up of fat). Unfortunately, it is impossible to get real answers because they don't know why it happens. I volunteer at an aquarium and they tell me they just havent studied these things. Ive fed her crickets her hole life. They are not fatty feeders.
It is slowly progressive, but the white in her eyes started from the outsides and worked its way in.