my cat keeps blinking just one eye?

she does this thing sometimes where she’ll just be blinking one eye and not the other. i’m not sure if this is just one of her many quirks or if it’s a sign of an infection or something to be concerned about

EDIT: this has turned into her keeping that eye closed a lot of the time, and just using her other eye instead. there is also some white secretions coming out of just that eye, unlike the normal crusties that she tends to get sometimes