Refresh Optive Advanced Lubricant Eye Drops 10 ml is a preservative-free, triple-action formula that lubricates and hydrates dry, burning, irritated eyes, and helps prevent tears from evaporating. It also features HydroCell technology which enables hydration and maintains the volume of cells on the eye's surface. The result? Triple-action relief dry, sensitive eyes. It comes in sterile vials you can take with you anywhere; preservative-free artificial tears.