I saw an episode of 60 minutes where they exposed the eye glass market as basically a huge monopoly. Some like 80% of all “brands” are actually owned by this Italian eye ware maker.
http://wire.kapitall.com/investment-idea/free-press-60-minutes-exposes-eyewear-monopoly-held-by-lux/
Everyone should read this. Ray Bans, Okaleys, and almost all brands are actually owned, designed and manufactured by Luxotica.