Naphcon-A Naphazoline Pheniramine Eye Drops is used to temporarily relieve eye redness, puffiness, itching, and watering that commonly occur with allergies. Naphazoline is a decongestant that works by constricting blood vessels in the eye, reducing redness and swelling. Pheniramine is an antihistamine that helps relieve itching and irritation caused by allergies. Together, these ingredients provide fast relief from eye discomfort associated with allergies, such as itching, redness, and watery eyes. Naphcon-A Eye Drops are typically used to treat allergic conjunctivitis and other minor eye irritations caused by allergens like pollen, pet dander, or dust.