I don't even think that you've scratched the surface of just how prevalent Luxottica is: you've touched the retail side of things, but, you also haven't touched the manufacturing side of things (Lux has patents on the hinges used in glasses), the wholesaling side of things (Lux supplies generic and branded frames to your local optician on less-than-preferred terms), and then just the genetic beast that is their optimization efforts.
I discovered some ineffective linux and db management that was adding 15-30 minutes of closing time every night -- time where we'd have employees on the clock waiting to close the store -- and figured out why it was behaving the way that it was and fixed it so the 'point of sales' part of closing wouldn't be the hold up. Saved the company almost 13 million dollars a year in labor costs and 45 million in licensing costs when I came up with a way to replace the POS systems OS without needing a cross-ship of new hardware...and still got screwed around when it came to my hourly rate increased or getting my contract renewed...
When my girlfriend's son passed away from complications with cancer, I had flowers and cards sent from some former coworkers, but, not a single person even reached out to me until a few months later, where they asked me if I was 'ready to go back to work' after cutting my contract.
It was well known that if someone robbed a Sunglass hut, the most expensive item in the store to replace was the iPad...