https://www.youtube.com/watch?v=gIiLO5wiPvQ
TL;DR — EssilorLuxottica is a massive, vertically integrated company that dominates the eyewear industry, owning major brands, lens manufacturers, retail chains, and even vision insurance plans. This consolidation allows them to control the entire customer journey, from initial choice to final purchase, leading to significant markups on products that cost very little to produce.
Takeaway — The eyewear industry is largely controlled by a single entity, EssilorLuxottica, which leverages its market dominance to dictate prices and limit consumer choice.