Optrex Eye Drops provide long lasting moisturisation to relieve the symptoms of dry eyes. Optrex Intensive Eye Drops offer intensive dry eye symptom relief that lasts. Instantly hydrate, lubricate and soothe dry eyes. Dry eye syndrome can be caused by many aspects of modern living, fromcomputer use to air conditioning and wearaing contact lenses. Effective and longer lasting relief than with common Hypromellose eye drops .Suitable for use with contact lenses.