Molly (soon to be 8) has a cloudiness to her lens in certain lights. I pointed it out to my vet when I first got her, and she said it is sometimes something you see in older dogs. I said, she's only 6. Vet said hmmm (love those medical "hmmm"s ) Anyway, she didn't think it was cataracts, Molly's thyroid is normal, and her vision doesn't seem affected, so we are just keeping an eye on it. In a year and a half, there's been no change