Visine for Allergy 3 Symptom Relief provides soothing relief for itchy, watery eyes caused by allergies to pollen, dust, ragweed and other allergens, while it also improves redness. Helps clear away eye mucous build-up associated with both allergies and colds. Zinc sulphate precipitates protein and helps clear mucus from the outer surface of the eye. Decongestant relieves redness.