Preservative free formula relieves discomfort due to dry, irritated eyes Prevents further irritation Hydrocell technology enables hydration and maintains the volume of cells on the eye's surface Recommended for sensitive eyes Can be used after LASIK or other eye surgeries. Follow your eye doctor's instructions if you are using REFRESH® RELIEVA™ PF after an eye surgery (e.g., LASIK) to relieve dryness and discomfort. On-the-go single use vials Also available in a preservative-free formula that comes in a multidose bottle. The #1 selling brand in preservative-free artificial tears.* *REFRESH Family of Products, Ipsos Healthcare, 2021 REFRESH ECP Recommendation Survey.