ST. LOUIS—Despite warnings by eye health experts that decorative contact lenses that are not prescribed by an eye doctor may cause eye damage, the lenses remain a popular Halloween costume accessory. To combat this potential eye hazard, the American Optometric Association is launching its annual, pre-Halloween "31 in 31" letter-writing campaign which takes aim at retailers who AOA claims are illegally distributing corrective, novelty or bogus contact lenses in violation of federal law. The campaign targets 31 online vendors, brick-and-mortar shops and other sellers who have been reported to the AOA as having inappropriate contact lens sales practices. Read More.