Technically not a monopoly but colloquially I disagree.
They account for 30% of the global market. They own key brands, license key premium names, and control key distributors like sunglass hut and LensCrafters.
Their cost to manufacture vs sale price shows a clear ability to price like a monopoly. As does their ability to box out competitors.
The $10 look alikes are not identical. They generally are cheaper materials, not polarized or coated, etc.
