People often wear reading glasses to correct a medical condition called presbyopia, which is a loss of vision caused by changes in the eye muscles and lens elasticity due to age. Many individuals experience presbyopia around or after age 40, when they find they must hold reading material farther away from their eyes to focus properly. Reading glasses, which can correct the problem, are available at many eye doctors' offices, grocery stores, drugstores and eye glass retail stores. Several different types of reading glasses are available.
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Progressive No-Line Bifocal Reading Glasses
No-line bifocal reading glasses have a clear section near the top of the lenses that progress to a prescription lens at the bottom of the glasses. While bifocal glasses have traditionally had a line on the lens to indicate the change between the clear and prescription sections of the lenses, many reading glasses are available without the bifocal line.
Half-Eyes Reading Glasses
Half-eyes reading glasses are small glasses that cover only the lower half of the eye, allowing the individual to look down and through the eyeglasses to read items and look over the eyeglasses to view other items normally. These are often called "peepers" because individuals can "peep" over the top of the glasses to look at other items.
Full Reading Glasses
Full reading glasses have lenses that cover the entire eye area, just like typical eyeglasses. Unlike bifocal lenses, there is no change in the prescription along the length or width of the lens. Some individuals who choose full-size reading glasses must take them off when they do not need them to read or view items.
Strong and Extra Strong Reading Glasses
Strong reading glasses have a prescription of +3.00, +3.25, +3.50, +3.75 and +4.00, and extra strong reading glasses include lenses with a prescription of +4.50, +5.00, +5.50 and +6.00. Speak with your physician about the correct prescription necessary for your reading glasses.
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