how can they discount glasses so much?

[Andrew Glasses]

Hi Matthew!

i tried to visit the site that you recommended, wow! they are just the only site that offers the cheapest but good quality. the reason why? i ask them how can they discount glasses so much? the answer:
Since they are bringing products from the factory directly to the customers via the internet, they do not have the additional overhead constraints and expenses that the traditional retailer will have. They have eliminated distributor and wholesaler mark-ups, retail space rent, behind-the-counter employees and warehousing. These savings are passed on to the customers, the general public.