progressives also called...

[William Glasses]

Progressive also called No-Line Bifocal or Varifocal. These lenses combine three visions all in one lens. The distance and reading portions of the lens blend together with a gradual progression from one to the other, giving a third area of the lens, intermediate vision which allows for clear vision at arms distance, so providing glasses to see in the far, middle and near distance with no dividing lines or segments - just one simple lens for all uses.

At cheapglasses123.com progressive are available in standard, Transition,Polarized and Polycarbonate lens.