This new progressive lens concept has never before been available in an over-the-counter priced eyeglass. It is amazing how well your eyes will adjust to the progressive lenses. They will work well for reading, computer work and over-the-desk distance. Many people need readers who do not need distance correction or perhaps just a bit of distance correction. These glasses are for that person! The Ambassador style comes in tortoise, black and clear. The frame has a spring hinge for a flexible fit. Frame Measurements: 5 x 1 1/2" (temple to temple x height of lens)
The power listing refers to the "range" of powers that are available within the lens; think of progressive lens as a seamless reading lens that has embedded powers from top to bottom. It's not like a bifocal or trifocal, where there's only fixed powers defined by the "lines" in the lens. Multi Focals have powers that are all between the listed powers.