Dilated eyes are no worries, just kind of painful if you're exposed to sun. I don't get mine dilated anymore because, like Karen, it takes FOREVER for mine to go back and I usually develop a migraine from it.

My eye doctor told me it takes longer for brown eyes to return to normal, I don't know if that is your case too Karen, but that was mine .

I promise your dog will be fine though, just give him some time.