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Reading glasses

Myopia, also termed "nearsightedness, is characterized by the ability to see nearby objects clearly while distant objects appear blurry. Myopia starts to occur in people between the ages of eight and twelve and almost always before the age of twenty. It typically stabilizes in adulthood. Presbyopia, a condition that occurs naturally in the aging process, is characterized by the lenses of the human eye losing their elasticity and consequently their ability to focus or accommodate for focused vision of objects located relatively close to the eye, such as reading a newspaper or a computer screen, for example. However, typically, myopic persons are able to view close objects in focus without the need for corrective lenses. Presbyopia usually occurs between ages forty and fifty. This condition is a natural part of the eye's aging process. It is not a disease and cannot be prevented. Presbyopia will affect everyone, including people who wear glasses to correct distance vision, astigmatism, or a combination of both. Presbyopia is overcome by the use of corrective reading glasses and by other means including bifocal lenses, magnifiers, contact lenses and controversial corrective eye surgery. A typical pair of reading eyeglasses includes a frame, two lenses, and two temples respectively pivoted to two sides of the frame. Customers of eyeglasses consider not only functions and cost but also aesthetics. Thus, eyeglasses become one of the symbols of fashion. Various designs for reading glasses are known. Reading glasses comprise plastic or glass corrective lenses secured within plastic, or metal rim-type eyeglass frames. The frames typically have a pair of ear retainers hingedly connected to either end, so that the reading glasses can be worn on the bridge of the nose and secured by the ears of the wearer.

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