What is the world's largest eyewear company?
Luxottica Luxottica Group S.p.A. is the world's largest eyewear company. It is based in Milan, Italy.
Seiko Seiko Holdings Corporation (セイコーホールディングス株式会社 , Seikō Hōrudingusu Kabushiki-gaisha ) (), more commonly known simply as Seiko ( ), is a Japanese holding company that holds subsidiaries which manufactures and sells watches, clocks, electronic devices, semiconductors, jewelries, and optical products.