My cat Waffles, who is an outdoor cat, won't open one of her eyes. It looks maybe a tad bit swollen but not very much. There isn't much discharge coming out of it either. She rubs at it a lot with her paw though. If she really wants to look at something she opens it just a tiny bit but for the most part she keeps it closed and just uses the other eye. I was able to open it a tiny bit last night but couldn't seen anything in it. I left both of our cats in the garage today so she wouldn't irritate it more outside. We have foxtails everywhere at our house so there could be one in her eye but I feel like there would be more discharge if there was one in there. If she hasn't improved by tomorrow I'll call the vet. Would giving her L-lysine in the meantime help?