Diopter glasses refer to eyeglasses that come with prescription lenses. Completely different from non prescription eyeglasses, Rx spectacles are capable of correcting specific vision problem, depending on the type of lens power. Visual refractive errors that have been recognized contain nearsightedness, farsightedness and astigmatism. Until now, the function of astigmatic correction has still been incorporated into myopia or hyperopic eyeglasses. Another vision problem that also requires the use of prescription spectacles is presbyopia. According to the above discussion, it is acceptable to say that diopter eyeglasses come in three major types. This classification is based wholly on respective eye problems. And these Rx eyewear products have benefited numerous individuals who suffer from any of those conditions.
First let us evaluate diopter glasses for myopia correction, which is the most commonly needed among the public. Farsightedness has even become a great concern among elementary, junior and senior school students. These boys and girls have usually to take excessive learning burden and use their immature eyes excessively. It is proven that excessive eye use and constant eye strain and stress are the major causes of visual refractive errors including myopia. Compared with other two conditions, myopia is the most common among human beings. Uncorrected myopia will certainly affect students’ study efficiency and result in unsatisfactory performance at school. Parents should take close attention to their children’s vision conditions. Rx eyeglasses used to correct hyperopia are similarly needed by a small group of school students and adults. This condition occurs much less frequently in human beings. But the principle of hyperopia glasses is similar to that of myopia glasses.
Another group which relies highly on diopter glasses is the presbyopic. In brief, the right solution for these people is reading glasses of various types. Reading glasses, bifocal reading glasses and progressive reading glasses can all remove presbyopic patients’ difficulty in seeing close-up things like newspaper, books, menus and other find print. In particular, single-vision reading glasses are prescribed with different degrees of magnifying power or diopters.