yep, im dealing with the same thing with my flame angel right now. shouldnt be popeye cause it happens in both eyes... i think. It started when he scratched his right on a piece of rock or so, and the eye gradually got worse and clouded up.
Starting to get better now, the best thing to do is to make certain that he is eating. If he is eating, he would be getting the nutrients and energy to make a comeback. If hes not eating then hes probably a gonner.