Upgrade to a higher standard of dry eye relief with the Systane Balance Lubricant Eye Drops, 0.33 oz. Every time you blink, you naturally give your eyes a new layer of tear film. With propylene glycol as the active ingredient, these Systane Restorative Formula Eye Drops a layer of long-lasting lubrication. Plus, the sterile eye drops adjusts to the ph level of your natural tears. If you spend most of your day on the computer, you can use this lubricating eye drop formula to refresh strained eyes. Or, if you wear eye contacts, you can use these dry eye drops to relieve uncomfortable dryness and itchiness. Since the Systane Balance Drops keeps moisture in your eyes to prevent further irritation, you get long-lasting eye comfort