A month or two ago two small (~1 mm) semi-opaque dots appeared on the center of Nemo's eyes. They were sort of there earlier than that but you had to look at his eyes in just the right light and angle to see them. My armchair vet diagnosis was corneal dystrophy and the eye doctor confirmed it today. She said it was the superficial kind (basically cholesterol or lipid deposits) and isn't anything really to worry about and doesn't need treatment.
She also mentioned that it can be helped along by high cholesterol foods so I should avoid those if possible. I've been giving Nemo little pieces of dried liver as kennel treats for the past year or so, and liver is reasonably high in cholesterol so she said to cut that out.
Thought I'd share in case someone else runs across it with their B.
P.S. Funny story is that this eye doctor is the same one that looked at Nemo's eyes when he was a puppy. But it was back when they had their practice down in Chicago rather than NE WI now. She was amazed that I still had the original eye exam report from the breeder. Very friendly doctor too.