Tearex Eye Drop contains 14mg Polyvinyl alcohol. It also contains 6mg Povidone and 5mg Chlorbutol. Polyvinyl alcohol improves upon the effects of burning sensations in the eyes. It operates as a decongestant that will constrict blood vessels around the eye to improve how blood flows, thus reducing the pains and other harmful effects that can develop in the eyes. Povidone and Chlorbutol help to moisturize and improve redness in the eyes. Tearex eye drop is used as a tear substitute to improve how the eyes are hydrated while preventing irritation around many parts of the eyes. Directions of use: A few drops will provide instant relief from itchiness or dryness.