LensCrafters is an international retailer of prescription eyewear, and prescription sunglasses, and the largest optical chain in the United States, with about 90 stores in California alone. It was founded in 1983 in the U.S. and has subsequently expanded to over 850 stores in Canada, the United States, Puerto Rico and Hong Kong. The stores usually feature independent optometrists on-site or in an adjacent store. The company has its corporate headquarters in Mason, Ohio, near Cincinnati. LensCrafters, Sunglass Hut International and Pearle Vision are all wholly owned subsidiaries of Italy-based Luxottica,the largest eyewear company in the world.