Visine Red Eye Comfort Redness Relief Eye Drops get the red out fast and works 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.