Boric acid is used for pink eye, but I don't have any in the house.

I did find info on the traditional use of lavendar for infection:

Lavender is renowned for its antibiotic properties. Studies have shown that the essential oil of lavender, particularly when combined with Geranium oil, is capable of killing some Staph infections. Other studies have reported that lavender is good for treating ear infections, and is mild enough to treat such symptoms in children. Recently, four new chemicals have been isolated from lavender plants, and are believed to be beneficial for the treatment of candida. There is ongoing research into these four substances.

[link to www.safealternativemedicine.co.uk]

I have a lot of lavendar flower buds for tea.