For the relief of redness of the eye due to minor eye irritations. Fast acting formula. Active Ingredients: Tetrahydrozoline HCl 0.05%. Visine Red Eye Comfort Redness Relief Eye Drops get the red out fast and work in 60 seconds. This fast-acting, redness reliever contains 0.05 percent tetrahydrozoline hydrochloride to relieve red eye due to minor irritations caused by exposure to smoke and other airborne pollutants, a poor night's sleep, or staring at a computer screen for long periods of time. From Visine, a brand backed by 60 years of expertise, these sterile eye drops offer fast-acting and effective eye redness relief. The small 0.5-fluid ounce bottle easily slips into a bag or purse, so you can relieve your red eyes anywhere, even on-the-go.