We use the same high-quality materials, but can offer them at a high discount because of our high volume, since we don't have the additional overhead constraints (such as retail rent space, behind-the-counter employees, and expensive displays) that your doctor's office or optical must overcome. Since operating this website is much less expensive than a typical retail establishment, we are able to pass these savings on to the general public. While our profit margins are not nearly as high as our competitors, we have a much higher volume, so at the end of the day, we make more profit than our competitors and our customers keep coming back time and time again!