New Optihist Eye Drops contains two active ingredients: Boric Acid and Naphazoline. Boric Acid has mild soothing and antimicrobial properties that help cleanse the eyes and relieve discomfort caused by external irritants. Naphazoline works as a decongestant by narrowing the small blood vessels in the eyes, which helps reduce redness and relieve eye irritation. These eye drops are primarily used to relieve symptoms of allergic eye conditions, such as redness, itching, swelling, and watery eyes. Use New Optihist Eye Drops only as directed by your doctor or eye specialist. If your symptoms do not improve within a week, worsen, or you experience severe pain or vision changes, consult your doctor for further evaluation.