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. Scraping, fracturing, or breakage of the lenses require time-consuming and costly professional repair, though modern plastic lenses are almost indestructible and very scratch-resistant. Gibson is also the surname of several notable people:. The lenses themselves can also become greasy or trap vapour when eating hot food or swimming or walking in rain, reducing visibility significantly. In Australia:. Even though the late-20th century saw the creation of light frames, such as those made of titanium, very flexible frames, and new lens materials and optical coatings, glasses can still cause problems during rigorous sports. In the United States:. Another unpopular aspect of glasses is their inconvenience.

Gibson may refer to:. Some people who find that wearing glasses may look nerdy turn to contact lenses instead, especially under peer pressure. . This conception probably comes from an era when most people were illiterate and the first people to wear glasses were those who did a lot of reading. William Gibson (Catholic martyr). An example of halo effect is seen in the stereotype that those who wear glasses are intelligent or, especially in teen culture, even geeks and nerds. William Gibson (novelist), the science fiction, cyberpunk novelist, author of Neuromancer. In popular culture, glasses were all the disguise Superman and Wonder Woman needed to hide in plain view as alter egos Clark Kent and Diana Prince, respectively.

William Gibson (playwright), author of 'The Miracle Worker. And of course John Lennon wore his round "granny glasses" from some of his time with the Beatles to his assassination in 1980. Wilfrid Wilson Gibson. Masaharu Morimoto wears glasses to separate his professional persona as a chef from his stage persona as Iron Chef Japanese. Thomas Milner Gibson. British comedic actor Eric Sykes, who became profoundly deaf as an adult, wears glasses that contain no lenses, but are in fact a bone-conducting hearing aid. Steve Gibson, of Gibson Research, makers of SpinRite. Drew Carey continued to wear glasses for the same reason after getting corrective laser eye surgery.

Gibson. British soap star Anne Kirkbride had the same problem: her character on Coronation Street, Deirdre Barlow, became so well-known for her big frames that she was expected to wear them at social gatherings and in international tours, even though Kirkbride has always worn contact lenses. Robert L. American Senator Barry Goldwater continued to wear lensless horn-rimmed spectacles after being fitted with contact lenses because he was not recognizable without his trademark glasses. Gibson. For some celebrities, glasses form part of their identity. Randall L. Glasses can be a major part of personal expression, from the extravagance of Elton John and Dame Edna Everage, from Groucho Marx to John Denver to Lisa Loeb all the way to the varied professional personas of eyeglass-wearing knowledge workers.

Mel Gibson, film actor, director and producer. On the other hand, many people are attracted to people who wear glasses, and glasses are available in a wide range of styles, materials, and even designer labels. Kirk Gibson. Contact lenses also provide much improved peripheral vision. Jon Gibson (minimalist musician). Glasses are often regarded as unattractive, and many people prefer to wear contact lenses for that reason. John Gibson (Indiana). Many people have several pairs of glasses, one for each task or distance, with specific glasses for reading, computer use, and television watching.

John Gibson (media host). Others have lenses specifically intended for use with computer monitors at a fixed distance. Jill Gibson. Some modern multifocal lenses give a smooth transition between these lenses, unnoticeable by most wearers. Jabbar Gibson. These were originally separate lenses, as invented by Benjamin Franklin. Gibson, the American psychologist influential in the field of visual perception. Traditional multifocal lenses have two or three distinct viewing areas, each requiring a conscious effort of refocusing.

J. As people age, their ability to focus is lessened and many decide to use multiple-focus lenses, bifocal or even trifocal to cover all the situations in which they use their sight. J. Lenses can be ground to specific eyes, but in most cases standard off-the-shelf prescriptions suffice, but require custom-fitting to particular frames. Ian Gibson (artist). Magnifying lenses for reading that are used to treat mild hypermetropia and presbyopia can be bought off the shelf, but most glasses are made to a particular prescription, based on degree of myopia or hypermetropia combined with astigmatism. Hutton Gibson. Glasses can be very simple.

Hoot Gibson. None of these conditions is considered a disease. Guy Gibson. As most people age the crystalline lens of the eye loses elasticity resulting in presbyopia, which limits their ability to focus on nearby objects. Gordon Gibson. Some would say "the rays of light converge at an imaginary point behind the retina." Astigmatism is a condition in which parallel rays of light entering the eye converge at two separate locations, either before and/or after the retina. Edward Gibson. Hyperopia is a condition in which parallel rays of light entering the eye do not converge prior to reaching the retina.

Edmund Gibson. Myopia is a condition in which parallel rays of light entering the eye converge before reaching to retina. Don Gibson. Emmetropia, the condition of ideal focus is described as two parallel rays of light entering the eye and converging on or at the retina. Deborah Gibson, is a singer, Broadway performer and former teen idol, credited as Debbie Gibson during her Teen Idol days. Glasses fitted with corrective lenses are a common means of correcting focus problems such as myopia (nearsightedness, short-sightedness) and hyperopia (farsightedness, long-sightedness). Colin Gibson. Virtual reality glasses and helmets have separate video screens for each eye and a method for determining the direction the head is turned.

Christopher Burke Gibson. One kind of electronic 3D spectacles uses electronic shutters. Chris Gibson (game), fictional race driver. Another kind of 3D glasses uses polarized filters. Chris Gibson (Tasmania), Australian politician. 3D glasses made of cardboard and plastic are distributed at 3D movies. Gibson. The classic 3D glasses have one red lens and one blue lens.

Charles H. Classic 3D glasses create the illusion of three dimensions when viewing specially prepared images. Charles Dana Gibson is a famous American graphic artist. The illusion of three dimensions on a two dimensional surface can be created by providing each eye with different visual information. Charles Gibson. Polarized sunglasses may present some difficulties for pilots in that reflections from water and other structures often used to gauge altitude may be removed, or instrument readings on liquid crystal displays may be blocked. Bob Gibson (musician) was an American folksinger. Popular among fishermen and hunters, polarized sunglasses allow wearers to see into water when normally glare or reflected light would be seen.

Bob Gibson was a baseball player. Polarization filters remove horizontal rays of light, which can cause glare. Althea Gibson. Light polarization is an added feature that can be applied to sunglass lenses. Alfred Gibson. Still, they offer the convenience of not having to carry both clear glasses and sunglasses to those who frequently go indoors and outdoors during the course of a day. Alexander Gibson. Unfortunately, many car windshields protect the passengers from UV light, while not shielding from bright visible light, making photochromic lenses ineffective where they are most needed.

Gibson Desert. Glasses with photosensitive lenses, called photochromic lenses, become darker in the presence of UV light. Gibson, Western Australia – a small village. Sunglasses vary greatly and many offer more style than protection. Gibson, Wisconsin. It is possible to have lenses that look very dark and yet offer little ultraviolet protection. Gibson County, Tennessee. Due to changes in the atmosphere, ultraviolet levels are much higher than in the past and ultraviolet protection for eyes and skin is even more important.

Gibson, Tennessee. Good sunglasses should also protect against ultraviolet light. Gibson Township, Michigan. plano) lenses that are darkened to provide protection against bright visible light. Gibson, Louisiana. Sunglasses may be made with either prescription or non-prescription (i.e. Gibson County, Indiana. Main article: Sunglasses.

Gibson Martini, see Martini cocktail. Corrective glasses with plastic lenses can often be used in the place of safety glasses in many environments; this is one advantage that they have over contact lenses. Gibson, to Hack. The pictured wraparound safety glasses are evidence of this style change with the close fitting nature of the wraparound dispensing with the need for side shields. Gibson Amphitheatre. Recent safety glasses have tended to be given a more stylish design, in order to encourage their use. Gibson Girl. They may provide less eye protection than goggles, face shields or other forms of eye protection, but their light weight increases the likelihood that they will actually be used.

Gibson Appliance. Some safety glasses are designed to fit over corrective glasses or sunglasses. Gibson Guitar Corporation. The lenses of safety glasses can also be shaped for correction. For example, those used in medicine may be expected to protect against blood splatter while safety glasses in a factory might have stronger lenses and a stronger frame with additional shields at the temples. Safety glasses can vary in the level of protection they provide.

Although safety lenses may be constructed from a variety of materials that vary in impact resistance, certain standards suggest that they maintain a minimum 1mm thickness at the thinest point regardless of material. Safety glasses are usually made with shatter-resistant plastic lenses to protect the eye from flying debris. Lenses made to conform to the prescription of an ophthalmologist or optometrist are called prescription lenses and are used to make prescription glasses. Glasses correcting for myopia will have negative diopter strengths.

Over-the-counter reading glasses are typically rated at +1.00 to +3.00 diopters. The power of a lens is generally measured in diopters. Corrective lenses modify the focal length of the eye to alleviate the effects of shortsightedness (myopia), longsightedness (hyperopia) or astigmatism. Either of these designs offers dramatically better ability to withstand the stresses of daily wear and the occasional accident.

Other frames have spring-loaded hinges. For instance, it is now possible to purchase frames made of special memory metal alloys that return to their correct shape after being bent. Despite the increasing popularity of contact lenses and laser corrective eye surgery, glasses remain very common and their technology has not stood still. These designs were not immediately successful, however, and various styles with attached handles such as scissors glasses and lorgnettes remained fashionable throughout the 18th and into the early 19th century.

The modern style of glasses, held by temples passing over the ears, was developed in 1727 by the British optician Edward Scarlett. Girolamo Savonarola suggested that eyepieces could be held in place by a ribbon passed over the wearer's head, this in turn secured by the weight of a hat. Early eyepieces were designed to be either held in place by hand or by exerting pressure on the nose (pince-nez). Over time, the construction of spectacle frames also evolved.

The first lenses for correcting astigmatism were constructed by the British astronomer George Airy in 1827. The American scientist Benjamin Franklin, who suffered from both myopia and presbyopia, invented bifocals in 1784 to avoid having to regularly switch between two pairs of glasses. However, it was not until 1604 that Johannes Kepler published in his treatise on optics and astronomy, the first correct explanation as to why convex and concave lenses could correct presbyopia and myopia. Nicholas of Cusa is believed to have discovered the benefits of concave lens in the treatment of myopia (nearsightedness).

These early spectacles had convex lenses that could correct the farsightedness (presbyopia) that commonly develops as a symptom of aging. Bacon's published writings describe the magnifying glass (which he did not invent), but make no mention of glasses. Other stories, possibly legendary, credit Roger Bacon with the invention. In 1738, a Florentine historian named Domenico Manni reported that a tombstone in Florence credited one Salvino d'Armato (died 1317) with the invention of glasses.

Based on this evidence, Redi credited another Dominican monk, Fra Alessandro da Spina of Pisa, with the re-invention of glasses after their original inventor kept them a secret, a claim contained in da Spina's obituary record. In 1676, Franciscus Redi, a professor of medicine at the University of Pisa, wrote that he possessed a 1289 manuscript whose author complains that he would be unable to read or write were it not for the recent invention of glasses, and a record of a sermon given in 1305, in which the speaker, a Dominican monk named Fra Giordano da Rivalto, remarked that glasses had been invented less than twenty years previously, and that he had met the inventor. The identity of the original inventor is unknown, although a possible source is the Arabs, who may have had magnifying lenses in the 10th century. Glasses were possibly invented in northern Italy, most likely in the late 1280s.

. Sunglasses protect against high levels of visible and ultraviolet light. Safety glasses are a kind of eye protection against flying debris or visible and near visible light or radiation. Corrective spectacles have lenses shaped to correct vision abnormalities, such as myopia.

Hydrophobic coatings designed to ease cleaning are also available, as are anti-reflective coatings intended to improve night vision and make the wearer's eyes more visible. Scratch-resistant coatings can be applied to most plastic lenses giving them similar scratch resistance to glass. Some plastics have a greater index of refraction than most types of glass, allowing thinner lenses for a given prescription. Some plastics also have more advantageous optical properties than glass, such as better transmission of visible light and greater absorption of ultraviolet light.

Glasses were originally made from glass, but many are now made from plastic (often polycarbonate or CR-39) due to the danger of breakage and the greater weight of glass lenses. In hipster slang they are cheaters. Spectacles is often shortened to specs. Glasses are more often called eyeglasses in North American English, occasionally spectacles in British English, and (rarely) frames or lenses.

Historical types include the pince nez, monocle, and lorgnette. Modern glasses are typically supported by pads on the bridge of the nose and by temples placed over the ears. Special glasses are used for viewing three-dimensional images or experiencing virtual reality. Glasses, spectacles, or eyeglasses are frames bearing lenses worn in front of the human eyes, sometimes for purely aesthetic reasons but normally for vision correction or eye protection.

Eyeglasses were a common part of the hipster persona, for example Dizzy Gillespie. Cheaters is used in the hipster argot. Lenses is also sometimes used to refer to framed eyepieces, although it is not common. Frames is sometimes used to refer to framed eyepieces, although it is not common.

In contrast, glass eye refers to a cosmetic prosthetic artificial eye that replaces a missing eye. Eye glasses or eyeglasses is a word used in North American English. Also in frequent use is the shortened form, specs. Spectacles is widely used in Britain and occasionally in the US, in addition to use by professional opticians.

Compare with other meanings of the word glass. Pair of glasses (or just glasses) is commonly used in Britain and in North America.

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