TheraTears Dry Eye Therapy Lubricant Eye Drops, Preservative Free, provide immediate, long-lasting relief of dry eye symptoms. Discover one-of-a-kind silky hydration. The single-use vials come in a foil pouch to ensure freshness. This preservative-free formula is great for those who suffer from sensitive eyes. TheraTears contains the 5 vital electrolytes found in natural tears. The eye drops corrects the salt imbalance that can cause dry eye symptoms. To use, instill 1 or 2 drops in the affected eye(s) as needed. TheraTears eye drops are FSA- and HSA-eligible in the U.S. TheraTears provides dry eye therapy by restoring, cleansing and nourishing the eye.