question: What is the world's largest eyewear company?
answer: Luxottica
context: Title: Ray-Ban Wayfarer
  Passage: Ray-Ban Wayfarer sunglasses have been manufactured by Ray-Ban since 1956, which in turn has belonged to the Italian Luxottica Group since 1999.  Wayfarers enjoyed early popularity in the 1950s and 1960s, returning to popularity again after a 1982 product placement.  A second revival occurred in the mid-2000s.
  Title: NYS Collection
  Passage: NYS Collection Eyewear is a United States-based sunglass and eyewear company founded in 1996 by Sal Babbino and Marc Behar.  The company started with a retail location at the World Trade Center in New York City.  Their headquarters are currently in Metuchen, New Jersey.
  Title: LensCrafters
  Passage: LensCrafters is an American 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(Including 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, a suburb of Cincinnati.  LensCrafters, Sunglass Hut International and Pearle Vision are all wholly owned subsidiaries of Italy-based Luxottica, the largest eyewear company in the world.
  Title: Luxottica
  Passage: Luxottica Group S.p.A. is the world's largest eyewear company.  It is based in Milan, Italy.
  Title: General Eyewear
  Passage: General Eyewear is London-based eyewear company and brand.  The company was founded in the late 1990s by Fraser Laing.  Originally under the name Arckiv, it produced its own original eyewear designs and had a particular specialism in Vintage eyewear.  In 2010 the company split into two distinct companies, Arckiv became solely focused on menswear, while General Eyewear became a stand-alone company and brand formed from the continuation of the original eyewear division.
citations: Ray-Ban Wayfarer Luxottica