Visine A.C. Itchy Eye Relief Eye Drops with zinc sulfate and tetrahydrozoline HCl Itchy eye drops formulated with an astringent & redness reliever for relief of multiple symptoms These eye drops effectively relieve red, itchy, watery eyes using two main active ingredients Active ingredient tetrahydrozoline HCl is a redness reliever designed to provide red eye relief Also contains the astringent zinc sulfate to relieve eye redness caused by minor irritations The small size fits conveniently in a purse, pocket, backpack or desk for symptom relief on-the-go For use, put one to two astringent eye drops in the affected eye up to four times daily These sterile eye drops come from Visine, a brand backed by 60 years of expertise