Redness Reduction with Visine Red Eye Comfort Eye Drops act in 60 seconds and quickly reduce redness. This quick-acting redness reliever has 0.05 percent tetrahydrozoline hydrochloride to treat mild irritants of the eyes brought on by exposure to smoke and other airborne pollutants, restless nights, or prolonged computer screen gazing. These sterile eye drops from Visine, a company with 60 years of experience, provide quick and efficient treatment from red eyes. You may alleviate your red eyes anywhere, even while on the road, thanks to the little 0.5 fluid ounce container that fits neatly into a bag or pocketbook.