a multidose sterile tear substitute with pre-dosed drops of the natural tear with Sodium chloride, Hyaluronic Acid and Zinc sulphate used to protect the surface of the eye. Hyaluronic acid has lubricating effects. Zinc sulphate moisturizes the surface of the eye in cases of dryness caused by stress, wind, smog, use of contact lenses, etc. This product can be used to hydrate eyes during treatments against allergy.