What can I do for her?

My poor baby occasionally gets a really irritated eye and it’s always the same one. When she gets it (about twice a month), she will just lay in bed and won’t get up or play. She will barely eat, I don’t know if she’s just being chiple or if it really makes her feel that bad. Is there something I can do? I’ve never taken her to the vet for it because I’ve never thought it bothered her that much.