Luxottica Group S.p.A. is the world's largest eyewear company. Its best known brand is Persol. It also makes sunglasses and prescription frames for a multitude of designer brands such as Chanel and Prada, whose designs and trademarks are used under license. Luxottica also makes sunglasses branded Giorgio Armani, Burberry, Stella McCartney,Versace, Vogue, Miu Miu, Tory Burch and Donna Karan. Its prime competitor is the Safilo Group S.p.A. When it comes to eyewear, Luxottica Group has it made in the shades. The world's largest eyewear firm, Luxottica designs, makes, and sells eyeglass frames and sunglasses, offering more than 20 licensed designer brands (Burberry, Chanel, Tiffany) and a dozen house brands (Ray-Ban and REVO). The group's 6,200-store (about 520 stores are franchises) retail arm, Luxottica Retail, operates LensCrafters and Pearle Vision optical shops, Sunglass Hut, Watch Station, and Watch World, and the EyeMed Vision Care group. Luxottica makes its frames in company-owned plants in Italy and China and sells them in about 130 countries. It acquired US sport sunglasses maker Oakley in 2007, as well as China's Modern Sight Optics.