THE TRUTH BEHIND BUY ONE GET ONE FREE?
In this promotion, while the second pair is advertised as FREE, the ‘free frame’ is not an identical one to the first frame of the purchase. The ‘free frame’ is usually one selected from a special collection in the store. These cheap frames cost the optical store about $2 to $4 each. You are overcharged ‘full’ price for the first pair and told you get a second pair free.