Here is search logs of 650,000 AOL users. It's very interesting to view search history of particular person and analyze his personality. Let's do it together! Read more about AOL search database scandal or view research papers on web searching.
bifocals
Bifocals are eyeglasses whose corrective lenses each contain regions with two istinct optical powers. Bifocals are most commonly prescribed to people with presbyopia who also require a correction for myopia, hypermetropia, and/or astigmatism.
Trivia about bifocals
His spectacle invention that's a sight for sore eyes
Ben Franklin invented these kinds of optical lenses for distance & reading
Tired of carrying 2 pairs of glasses around, Benjamin Franklin invented these