Adam Ruins Everything - The Conspiracy Behind Your Glasses (youtube.com)
Did you know that a single company controls 80% of all glasses and sunglasses brands?- Luxottica (Wikipedia)
Luxottica Group S.p.A. is an Italian eyewear conglomerate based in Milan. As a vertically integrated company, Luxottica designs, manufactures, distributes, and retails its eyewear brands all through its own subsidiaries. The company, presently organized as a subsidiary of EssilorLuxottica which formed when the Italian conglomerate merged with the French optical firm Essilor, is the world’s largest company in its industry, both prior to and after its merger with Essilor.