Blink Tears Dry Eye Lubricating Eye Drops in Single Use Vials are designed for mild to moderate dry eye symptoms. Experience immediate and long-lasting dry eye symptom relief. Blink's unique gentle, preservative free formulation maximizes hydration and helps restore your tears' natural balance, providing long-lasting dry eye symptom relief. The sterile, single use vials can easily be carried in a pocket or purse, for on-the-go soothed, hydrated eyes. Simply twist and pull the tab to instill 1 to 2 drops in each eye. Experience moisturized eyes with Blink, because your eyes deserve the best.