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Revision as of 03:46, 30 September 2002 by Ortolan88 (talk | contribs) (sebastian song, etc.)(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff)Eyeglasses (also called spectacles or glasses, slang cheaters) are lenses worn in a frame before the eyes. Modern eyeglasses are typically supported by pads on the bridge of the nose and by arms placed over the ears. Historical types of eyeglasses included the pince nez, monocle and lorgnette.
Eyeglasses were originally made from glass, but many are now made from plastic due to the danger of breakage and the greater weight of glass lenses. Glass lenses, on the other hand, are much less prone to scratching.
Eyeglasses fitted with corrective lenses are a very common means of correcting focus problems such as nearsightedness and farsightedness. Nearsighted people cannot focus at long distances; farsighted people cannot focus at close distances. Astigmatism is mismatched focussing horizontally and vertically. Presbyopia is limited flexibility in focussing. None of these conditions are diseases.
Glasses can be very simple. Magnifying lenses for reading that are used to treat mild farsightedness and presbyopia that can be bought off the shelf, but most glasses are made to a particular prescription, based on degree of nearsightedness or farsightedness combined with astigmatism. Lenses can be ground to specific eyes, but in most cases standard off-the-shelf prescriptions suffice, but require custom-fitting to particular frames.
As people age, their ability to focus is lessened and many come to need multiple-focus lenses, bifocal or even trifocal to cover all the situations in which they use their sight.
Traditional multifocal lenses had two or three distinct viewing areas, each requiring a conscious effort of refocusing. These were originally separate lenses, as invented by Benjamin Franklin, an early eyeglass-wearing celebrity.
Modern multifocal lenses give a smooth transition between these lenses, unoticeable by most wearers. Other glasses wearers sometimes have lenses specifically intended for use with computer monitors at a fixed distance. On the other hand, many people simply have several pears of glasses, one for each task or distance.
Glasses are often regarded as unattractive (see Dorothy Parker), and many people prefer to wear contact lenses for that reason. Contact lenses also provide much improved peripheral vision.
On the other hand, many people are attracted to people who wear glasses, and glasses are available in a very wide range of styles, materials, and even designer labels.
Eyglasses can be a major part of personal expression, from the extravagance of Elton John and Dame Edna Everidge from Groucho Marx to John Denver all the way to the varied professional personas of eyeglass-wearing knowledge workers.
For some celebrities, glasses form part of the identity. Sen. Barry Goldwater continued to wear lensless horn-rimmed spectacles after being fitted with contact lenses because he was not recognizable without his trademark glasses.
In popular culture, eyeglasses were all the disguise Superman and Wonder Woman needed to hide in plain view as alter egos Clark Kent and Diana Prince.
Eyeglass wearers have also been stereotyped as intelligent or even geeks. This is because the first people to wear glasses were those who did a lot of reading in an era when most people were illiterate.
Other kinds of eyeglasses include tinted protective lenses, ranging from sunglasses, which protect the eye from glare and ultraviolet radiation, to specialized units that protect against extreme brightness and are used for welding and viewing eclipses.
Prescription sunglasses, which combine protection from bright light with vision correction, have become fairly common. Some glasses have photo-sensitive lenses that darken as the light grows brighter. They are sunglasses and indoor glasses in one.
Eyeglasses fitted with coloured or polarized lenses can be used to view three-dimensional images.
Old Saying
- The optimist looks at the world through rose-colored glasses.
Song
- Eyeglass wearing John Sebastian wrote a song called "Four Eyes" that started out:
- When your a kid that sees through plastic
- with a harness of elastic
- So the girls all think you´re icky
- And the boys all think you´re queer