Because Luxottica is the DeBeers of glasses. Warby Parker, and IIRC Walmart, are the major insurgents against them in the US. I thought Costco also was after th

Because Luxottica is the DeBeers of glasses. Warby Parker, and IIRC Walmart, are the major insurgents against them in the US. I thought Costco also was after their business but it looks like they sell a great deal of Luxottica product.