I looked at this diabetic terrier today to see if it had any lens changes and came across this appearance. What do you see here?
Here is a picture at a different exposure showing these multiple concentric rings. In nuclear sclerosis you see one ring where the nucleus and cortex meet, but I’ve never seen changes in the lens like these. In fact I think in retrospect (and with help from Peter Renwick -many thanks to him!) that the dog has had a classic diabetic cataract and phaco surgery with a replcament lens, which is what we are seeing here!