How is owning most of the retail outlets in malls a monopoly?
Moreover, Luxottica are vertically-integrated, controlling design, manufacture and distribution of many major brands in both prescription and fashion eyewear. Their in-house brands include Arnette, Oakley, Oliver Peoples, Persol, Ray-Ban, Vogue and others. Additionally they manufacture product under license for many more, like Brooks Brothers, Chanel, D&G, DKNY, Ralph Lauren, Prada, Tiffany and Versace.
So, monopoly or not, it's fair to say that Luxottica exerts considerable control over the worldwide eyewear market!
Luxottica did something similar with Ray-Ban. Their products used to sell for around $19 in gas stations. After the Luxottica takeover, they became a "luxury" brand, with prices from $129 to $300.
Not that they really cost much. The manufacturing cost of eyeglasses is about $2. The insane price of frames comes from a monopoly by Luxottica, which owns most of the retail outlets in malls in the US.
[1] http://www.focus-on-vision.org/ [2] http://projectcongo.org/photocollections/eyeglassmaking.html