Opticrom aqueous 2 eye drops solution contains a medicine called sodium cromoglicate which belongs to a group of medicines called antiallergics it works by stopping the release of the natural substances in your eyes that can lead to an allergic reaction signs of an allergic reaction include itchy watery red or inflamed eyes and puffy eyelids opticrom aqueous is used for the prevention relief and treatment of eye allergies this includes short and long term allergic conjunctivitis