I definitely want to get Raven to the vet as soon as I can but I think he's still at the stage where he would go into a total panic. I will use Ace if I have to but I'd rather avoid it. I don't know if it's the kind of thing that a vet could only assess if the cat was fully alert. The eye doesn't seem to bother him at all. It is as wide open as the other and he appears to see well. He's not blue eyed and is a black DSH. I used the word shiver because I am having a very hard time describing what I see. It's a very transitory motion, over by the time you realize there is a motion. My concern is that there is something going on within his eye.