LONG-LASTING HYDRATION FOR DRY EYES, INCLUDING LASIK DRYNESS: REFRESH OPTIVE Preservative-Free Lubricant eye drops contains not just one, but two active ingredients that relieve dry, burning, irritated eyes due to Dry Eye. This specially designed, patented formula provides long-lasting moisture that hydrates and protects the cells of the eye that can become damaged due to Dry Eye. And, REFRESH OPTIVE preservative-free is also recommended for LASIK dryness. If you have recently had LASIK surgery, please follow your eye doctor’s instructions regarding the use of REFRESH OPTIVE Preservative-Free. REFRESH OPTIVE Preservative-Free Lubricant Eye Drops come in sterile, single-use vials you can take with you anywhere. Safe to use as often as needed.