Allergy Desensitization Eye Drops stop allergy symptoms such as itching, burning, watering, edema and general ocular sensitivity. The drops are a sterile, non-preserved, pH balanced, isotonic solution containing four homeopathic active ingredients. Note: For non-allergic watering (tearing) secondary to dry eye, dispense our “Tear Stimulation Dry Eye Drops.” All Natural Ophthalmics Rx products are safe for use with contact lenses of all types. There are no known side effects or drug interactions. Safe for pregnant women and children. Preservative free.