MediView filters are not a substitute for medication or treatment and are not intended as a means of retarding or preventing either onset of, or deterioration of any new or pre-existing conditions or symptoms. If unexpected symptoms persist or occur while using MediView filters, cease use and consult a medical practitioner immediately. Consult your medical practitioner before commencing use if unsure of your suitability to use MediView filters. Products are unsuitable for direct viewing of the sun, bright light sources, use in solaria or for driving at night. MigraLens® is a category 2 filter for use in average sunlight. The optical characteristics of the filters renders them unsuitable for road use and driving. All MediView sunglasses satisfy BS EN ISO 12312-1-2013. This eyewear is not designed to protect the wearer from all injury resulting from impacts in the event of the frame or lens being struck by an object. The lenses are produced from impact resistant, but not shatterproof, polycarbonate and should not be used as industrial safety eyewear. They should be cleaned using warm soapy water and gently dried with a soft cloth or the microfibre cloth case supplied.