Dr. Barney presents evidence-based treatment of nonvision-threatening allergic eye diseases, focusing specifically on seasonal allergic conjunctivitis (SAC) and perennial allergic conjunctivitis (PAC). Both SAC and PAC are common, and evidence-based treatment choices strongly suggest topical antihistamine or mast cell stabilizer drops. Dr. Barney also discusses vernal keratoconjunctivitis (VKC) and atopic keratoconjunctivitis (AKC), both of which are sight-threatening.