The proper role of government in a capitalist economic system has been hotly debated for centuries. Unlike socialism, communism or fascism, capitalism does not assume a role for a coercive, centralized public authority.
Reading glasses come in two main styles: full frames, in which the entire lens is made in the reading prescription, and half-eyes, the smaller Ben Franklin style glasses that sit lower down on the nose. Full reading glasses are suitable for people who spend a great deal of time concentrating on material close-up. If you try to look up and across the room through the reading lenses, everything appears blurry.
Prescription reading glasses are made so that the optical center of the lens is lined up exactly at the center of the pupil. When the optical center is not lined up, you may end up looking through the side of the lens, which can cause eye strain and eye muscle imbalances.