efta says not only are they potentially harmful, it is illegal to sell them without -- the fda says note potentially harmful, it is illegal to sell them without a prescription. >> they could cause damage to one side including blindness. -- to one's eye, including blindness. >> we stop them out prescription, but we can order them with prescriptions. >> of the fda says they are illegal to sell without prescription. >> that i have not heard. >> lenses do come with a written warning. federal officials say it is up to the retailer to make sure all of its products have the required blood testing cert. it is taking a finding very