Similasan Itchy Eye Eye Drops Similasan Itchy Eye Eye Drops provide fast, effective relief from itchy & irritated eyes caused by allergies. The sterile, p H balanced drops gently moisturise to calm itchy, red, swollen eyes caused by pollen, pets, dust mites, mould spores, cosmetics, perfumes, ozone or other external causes. Similasan Itchy Eye Eye Drops can be applied as often as needed, for as long as needed, to relieve symptoms & no side effects or drug interactions have been observed to date. All Similasan products are registered Class IIb medical devices & have been approved for use whilst wearing contact lenses, although the wearing of contact lenses is not recommended if the eye is inflamed.