My boyfriend and I took a kitten in that our neighbor had found under his house on Friday. When we got him, both of his eyes were matted shut, so we have been wiping gently with a washrag with warm water. When we got his eyes open, we noticed the left one kind of has this film on it and it's a little swollen. He's eating, drinking, and using the litterbox regularly. It is now Wednesday, and the film is still there. He's also running around and playing like he should be. He does not seem to be acting like it is bothering him whatsoever. Any idea what this film could be?