LENS Local labs (and increasingly regional labs) mass customize these lens blanks based on frame and prescription details. - $7-11: For a pair of single vision lenses - $35-40: For a pair of transition lenses with progressive prescription - A couple dollars for labor AT MOST - A couple dollars for additional high end treatments that isn't already backed into the blanks (large CapEx now involved in these treatment machines hence the regionalization of these labs).
VISION INSURANCE - More of a discount program than insurance - Labs are often what "vision insurance" own with a discount program that is extended to you via these services at your local optometrist. - Medical insurance (not your vision insurance) covers anything serious...generally when you need to go see an Opthamologist or a Eye surgeon
LUXOTTICA They are aggressive, smart, license a good chunk of the luxury brands, AND vertically integrated to the nth degree. And yes, they own one of the largest "vision insurance" companies too, EyeMed.