TheraTears Dry Eye Therapy Lubricant Preservative Free eye drops, 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. Dr. Jeffrey P. Gilbard, Ophthalmologist created TheraTears eye drops after 18 years of research for dry eyes. 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.