FUSION Allergy Eye Drops (15). Preservative free eye drops for treatment and prevention of allergic symptoms such as red, itchy and watery eyes.. Preservative free eye drop. Contact lens compatible. Suitable from 1 year+. Suitable for Eye allergy symptoms (Red, itchy an watery eyes). Contains 1% Ectoin to help protect the ocular surface from harmful allergens.. Comes in Single Dose Units, each containing 0.5ml