Catacrom has been introduced to coincide with the hay fever season. However it has the added benefit of helping the many people who suffer with all year round (perennial) allergic conjunctivitis brought on by house dust mites, pet fur and even allergic reactions from contact with substances such as cosmetics.  Catacrom is equally effective as a prophylaxis, but treatment should be started before the patient is exposed to the allergen. It has minimal side effects and is suitable to be used by children, as well as users of gas permeable and rigid contact lenses.