Artminds Reading Glasses Black With White Script

Class of vision aid

Glasses
A mod pair of glasses
Other names	Eyeglasses, spectacles
Specialty	Ophthalmology, optometry
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Glasses, also known as eyeglasses or spectacles, are vision eyewear, consisting of clear lenses mounted in a frame that holds them in front end of a person'southward eyes, typically utilizing a bridge over the olfactory organ and hinged arms (known as temples or temple pieces) which remainder over the ears.

Glasses are typically used for vision correction, such every bit with reading glasses and glasses used for nearsightedness; however, without the specialized lenses, they are sometimes used for cosmetic purposes.

Safety glasses provide eye protection against flying droppings for construction workers or lab technicians; these glasses may take protection for the sides of the eyes likewise as in the lenses. Some types of safety glasses are used to protect confronting visible and near-visible light or radiation. Glasses are worn for eye protection in some sports, such equally squash.

Glasses wearers may apply a strap to prevent the glasses from falling off. Wearers of glasses that are used just role of the fourth dimension may have the glasses fastened to a cord that goes around their neck, to forestall the loss of the glasses and breaking. The loss of glasses would be detrimental to those working in these conditions.

Sunglasses let for amend vision in bright daylight, and may protect one's eyes against harm from excessive levels of ultraviolet light. Typical sunglasses lenses are tinted for protection confronting bright light or polarized to remove glare; photochromatic spectacles are blacked out or lightly tinted in dark or indoor weather condition, only turn into sunglasses when they come in contact with ultraviolet lite. Most over the counter sunglasses practice not have corrective power in the lenses; however, special prescription sunglasses can be made. People with weather that accept photophobia equally a principal symptom (like certain migraine disorders or Irlen syndrome) often habiliment sunglasses or precision tinted spectacles, fifty-fifty indoors and at night.

Specialized glasses may be used for viewing specific visual information, for example 3D glasses for 3D films (stereoscopy). Sometimes glasses are worn purely for style or aesthetic purposes. Even with spectacles used for vision correction, a wide range of fashions are available, using plastic, metal, wire, and other materials for frames.

Types [edit]

Glasses can be marked or found by their primary function, only also appear in combinations such as prescription sunglasses or safety glasses with enhanced magnification.

Corrective [edit]

Corrective lenses are used to correct refractive errors by bending the light entering the center in gild to alleviate the furnishings of atmospheric condition such as nearsightedness (myopia), farsightedness (hypermetropia) or astigmatism. The ability of one'due south eyes to accommodate their focus to most and distant focus alters over time. A common condition in people over forty years old is presbyopia, which is caused by the eye's crystalline lens losing elasticity, progressively reducing the ability of the lens to conform (i.e. to focus on objects shut to the eye). Few people have a pair of eyes that prove exactly equal refractive characteristics; one eye may need a "stronger" (i.e. more than refracting) lens than the other.

Corrective lenses bring the image back into focus on the retina. They are made to conform to the prescription of an ophthalmologist or optometrist. A lensmeter tin can be used to verify the specifications of an existing pair of glasses. Corrective eyeglasses tin significantly better the life quality of the wearer. Not only practice they enhance the wearer's visual experience, only can also reduce bug that result from eye strain, such equally headaches or squinting.

The virtually mutual type of cosmetic lens is "unmarried vision", which has a uniform refractive index. For people with presbyopia and hyperopia, bifocal and trifocal spectacles provide ii or three different refractive indices, respectively, and progressive lenses accept a continuous slope.^[1] Lenses can also exist manufactured with high refractive indices, which let them to exist more than lightweight and thinner than their counterparts with "depression" refractive indices.

Reading spectacles provide a split up set of glasses for focusing on close-by objects. Reading spectacles are available without prescription from drugstores, and offer a cheap, practical solution, though these have a pair of uncomplicated lenses of equal power, and so will not correct refraction problems like astigmatism or refractive or prismatic variations betwixt the left and correct eye. For the total correction of the individual'southward sight, glasses complying to a recent ophthalmic prescription are required.

People who need spectacles to encounter often have corrective lens restrictions on their driver'southward licenses that require them to wear their spectacles every time they bulldoze or risk fines or jail time.

Some militaries issue prescription glasses to servicemen and women. These are typically GI glasses. Many state prisons in the Usa issue spectacles to inmates, often in the class of clear plastic aviators.

Adjustable-focus eyeglasses might be used to replace bifocals or trifocals, or might be used to produce cheaper unmarried-vision glasses (since they don't have to be custom-manufactured for every person).

Pinhole glasses are a type of corrective glasses that practise non use a lens. Pinhole spectacles do not actually refract the calorie-free or alter focal length. Instead, they create a diffraction limited system, which has an increased depth of field, similar to using a small discontinuity in photography. This form of correction has many limitations that preclude it from gaining popularity in everyday employ. Pinhole glasses can exist made in a DIY style past making small-scale holes in a piece of carte du jour which is then held in front of the optics with a strap or cardboard arms.

Safe [edit]

Safety glasses are worn to protect the eyes in diverse situations. They are made with break-proof plastic lenses to protect the eye from flying debris or other matter. Structure workers, factory workers, machinists and lab technicians are often required to vesture prophylactic spectacles to shield the optics from flight droppings or hazardous splatters such as blood or chemicals. As of 2017, dentists and surgeons in Canada and other countries are required to clothing rubber glasses to protect against infection from patients' blood or other body fluids. In that location are also rubber glasses for welding, which are styled similar wraparound sunglasses, but with much darker lenses, for use in welding where a full-sized welding helmet is inconvenient or uncomfortable. These are often called "wink goggles" because they provide protection from welding flash. Nylon frames are ordinarily used for protective eyewear for sports considering of their lightweight and flexible properties. Different most regular glasses, rubber glasses often include protection beside the eyes as well as in forepart of the eyes.

Sunglasses [edit]

Sunglasses provide more comfort and protection against bright calorie-free and often confronting ultraviolet (UV) lite. To properly protect the eyes from the dangers of UV low-cal, sunglasses should have UV-400 blocker to provide good coverage against the unabridged light spectrum that poses a danger.^[ii]

Light polarization is an added characteristic that can be practical to sunglass lenses. Polarization filters are positioned to remove horizontally polarized rays of low-cal, which eliminates glare from horizontal surfaces (allowing wearers to see into water when reflected light would otherwise overwhelm the scene). Polarized sunglasses may nowadays some difficulties for pilots since reflections from water and other structures often used to gauge altitude may exist removed. Liquid-crystal displays emit polarized low-cal, making them sometimes difficult to view with polarized sunglasses. Sunglasses may be worn just for aesthetic purposes, or simply to hide the eyes. Examples of sunglasses that were popular for these reasons include tea shades and mirrorshades. Many blind people wear nearly opaque glasses to hibernate their eyes for cosmetic reasons. Many people with calorie-free sensitivity atmospheric condition wear sunglasses or other tinted spectacles to make the calorie-free more than tolerable.

Sunglasses may too take cosmetic lenses, which requires a prescription. Clip-on sunglasses or sunglass clips can exist attached to another pair of spectacles. Some wrap-around sunglasses are big enough to be worn over top of another pair of glasses. Otherwise, many people opt to wear contact lenses to correct their vision and so that standard sunglasses can exist used.

Mixed doubleframe [edit]

Doubleframe eyewear with 1 prepare of lenses on the moving frame and another pair of lenses on a fixed frame (optional).

The double frame uplifting glasses have one moving frame with one pair of lenses and the basic fixed frame with another pair of lenses (optional), that are continued by iv-bar linkage. For example, sun lenses could be easily lifted upward and downwardly while mixed with myopia lenses that always stay on. Presbyopia lenses could exist as well combined and easily removed from the field of view if needed without taking off glasses.

3D glasses [edit]

The illusion of three dimensions on a 2-dimensional surface tin be created past providing each heart with unlike visual data. 3D glasses create the illusion of three dimensions by filtering a indicate containing information for both optics. The signal, often low-cal reflected off a motion picture screen or emitted from an electronic display, is filtered and then that each eye receives a slightly dissimilar epitome. The filters simply work for the type of bespeak they were designed for.

Anaglyph 3D glasses have a different colored filter for each eye, typically cherry-red and blueish or cherry-red and green. A polarized 3D system on the other paw uses polarized filters. Polarized 3D glasses allow for color 3D, while the red-blue lenses produce an paradigm with distorted coloration. An active shutter 3D arrangement uses electronic shutters. Head-mounted displays can filter the signal electronically and then transmit light straight into the viewer's eyes.

Anaglyph and polarized glasses are distributed to audiences at 3D movies. Polarized and active shutter glasses are used with many abode theaters. Head-mounted displays are used by a single person, simply the input indicate can be shared between multiple units.

Magnification (bioptics) [edit]

Glasses tin also provide magnification that is useful for people with vision impairments or specific occupational demands. An example would be bioptics or bioptic telescopes which have pocket-sized telescopes mounted on, in, or behind their regular lenses. Newer designs use smaller lightweight telescopes, which can be embedded into the corrective glass and improve aesthetic advent (mini scope spectacles). They may take the course of cocky-contained glasses that resemble goggles or binoculars, or may be attached to existing glasses.

Yellow-tinted computer/gaming spectacles [edit]

Yellowish tinted spectacles are a type of glasses with a modest yellow tint. They perform small color correction, on top of reducing eyestrain due to lack of blinking. They may also exist considered minor corrective unprescribed spectacles.^[3] Depending on the company, these computer or gaming glasses can too filter out high energy blue and ultra-violet light from LCD screens, fluorescent lighting, and other sources of light. This allows for reduced middle-strain.^[4] These glasses tin be ordered as standard or prescription lenses that fit into standard optical frames.^[5]

Blue-light blocking glasses [edit]

Eyeglasses that filter out blueish lite from computers, smartphones and tablets are becoming increasingly popular in response to concerns about problems caused by blue low-cal overexposure.^{[half dozen]} The problems claimed range from dry eyes to heart strain, sleep cycle disruption, up to macular degeneration which tin cause fractional incomprehension.^[6] But research shows no measurable ultraviolet radiation from figurer monitors.^{[6] [vii]} Long hours of computer use may cause eye strain, not blue light.^{[six] [viii] [9] [10]} Many centre symptoms caused by computer utilise will lessen after end using the computer.^[6] Decreasing evening screen time and setting devices to dark mode will meliorate sleep.^{[8] [eleven]} Blue light from computers will not atomic number 82 to centre diseases, including macular degeneration.^{[viii] [12] [13]}

The American Academy of Ophthalmology (AAO) doesn't recommend special eyewear for computer apply,^{[half-dozen] [9]} although it recommends using prescription glasses measured specifically for computer screen altitude (depending on individuals, simply possibly 20-26 inches from the face), which are not the same every bit "blue-low-cal blocking" glasses.^[14] The position of the College of Optometrists (UK) is "the best scientific evidence currently available does not back up the employ of blue-blocking spectacle lenses in the general population to meliorate visual performance, alleviate the symptoms of eye fatigue or visual discomfort, meliorate sleep quality or conserve macula health."^[xv] However, some users practise find benefits, and some heart professionals believe they have benefits, at least for reducing heart strain.^[9]

Anti-glare protection glasses [edit]

Anti-glare protection glasses, or blue-light glasses, tin can reduce the reflection of light that enters the eyes. Blue-light blocking spectacles are designed to filter or block bluish calorie-free and reduce the center strain from it, likely coming from electronic LED screens.^[16] The lenses are given an anti-glare blanket to prevent reflections of light under dissimilar lighting conditions. By reducing the corporeality of glare on your eyes, vision tin be improved.^[17]

The anti-glare likewise applies to the outer glass, thus allowing for improve eye contact.^[17]

Frames [edit]

Glasses, c.  1920s, with springy cablevision temples

The ophthalmic frame is the role of a pair of glasses that is designed to concord the lenses in the proper position. Ophthalmic frames come up in a variety of styles, sizes, materials, shapes, and colors.^[xviii]

Parts [edit]

• pair of centre wires or rims surrounding and holding the lenses in place
• bridge which connects the ii eye wires
• chassis, the combination of the eye wires and the span
• top bar or brow bar, a bar simply above the bridge providing structural support and/or style enhancement (country/Grandpa manner). The add-on of a peak bar makes a pair of glasses aviator eyeglasses
• pair of brows or caps, plastic or metal caps which fit over the top of the center wires for style enhancement and to provide boosted support for the lenses. The addition of brows makes a pair of glasses browline glasses
• pair of nose pads that allows a comfortable resting of the eye wires on the nose
• pair of pad artillery connect the nose pads to the middle wires
• pair of temples (earpieces) on either side of the skull
• pair of temple tips at the ends of the temples
• pair of end pieces connect the eye wires via the hinges to the temples
• pair of frame-forepart pieces
• pair of hinges connect the terminate pieces to the temples, assuasive a swivel move. Spring-loaded flex hinges are a variant that is equipped with a minor spring that affords the temples a greater range of movement and does not limit them to the traditional, 90-caste bending.

Temple types [edit]

• Skull temples: bend downwardly behind the ears, follow the profile of the skull and residuum evenly against the skull
• Library temples: more often than not straight and do not bend downward backside the ears. Concord the glasses primarily through light pressure level confronting the side of the skull
• Convertible temples: used either equally library or skull temples depending on the aptitude
• Riding bow temples: curve effectually the ear and extend down to the level of the ear lobe. Used more often than not on athletic, children'south, and industrial safe frames;
• Condolement cablevision temples: like to the riding bow, merely fabricated from a springy cable of coiled metal, sometimes inside a plastic or silicone sleeve. The tightness of the curlicue tin exist adjusted along its whole length, allowing the frame to fit the wearer's ear curve perfectly. Used for physically active wearers, children, and people with loftier prescriptions (heavy lenses).^{[19] [xx]} Meet the epitome of 1920s frames above.

Materials [edit]

Plastic and polymer [edit]

• Cellulose acetate
• Optyl, a type of hypoallergenic material made especially for eyeglass frames. Information technology features a blazon of elasticity that returns the material to its original shape.
• Cellulose propionate, a molded, durable plastic
• 3D-printed plastic using super-fine polyamide powder and Selective laser sintering processes – encounter Mykita Mylon (The frames can be 3-D printed by Fused Filament Fabrication for pennies of ABS, PLA or nylon)^[21]
• Nylon

Metal [edit]

Various metals and alloys may be used to make glasses such as aureate, silvery, aluminum, beryllium, stainless steel, titanium, monel and nickel titanium.

Natural cloth [edit]

Also natural materials may be used such as wood, os, ivory, leather and semi-precious or precious stones.

Corrective lens shape [edit]

Modern glasses with a rectangular lens shape

Cosmetic lenses tin be produced in many dissimilar shapes from a circular lens called a lens blank. Lens blanks are cut to fit the shape of the frame that will hold them. Frame styles vary and fashion trends alter over fourth dimension, resulting in a multitude of lens shapes. For lower power lenses, there are few restrictions which allow for many trendy and fashionable shapes. Higher power lenses can crusade baloney of peripheral vision and may become thick and heavy if a large lens shape is used. However, if the lens becomes too small, the field of view can be drastically reduced.

Bifocal, trifocal, and progressive lenses generally require a taller lens shape to leave room for the dissimilar segments while preserving an adequate field of view through each segment. Frames with rounded edges are the virtually efficient for correcting myopic prescriptions, with perfectly round frames being the most efficient. Before the appearance of eyeglasses as a way detail, when frames were synthetic with only functionality in mind, virtually all eyeglasses were either round, oval, rectangular or curved octagons. Information technology was non until glasses began to be seen as an accompaniment that dissimilar shapes were introduced to be more than aesthetically pleasing than functional.

History [edit]

Precursors [edit]

Scattered bear witness exists for use of visual assist devices in Greek and Roman times, near prominently the utilize of an emerald by emperor Nero as mentioned by Pliny the Elder.^[22]

The use of a convex lens to form an enlarged/magnified prototype was most likely described in Ptolemy'south Optics (which survives only in a poor Arabic translation). Ptolemy's description of lenses was commented upon and improved by Ibn Sahl (10th century) and well-nigh notably by Alhazen (Book of Optics, c. 1021). Latin translations of Ptolemy's Optics and of Alhazen became available in Europe in the twelfth century, coinciding with the development of "reading stones".

Robert Grosseteste's treatise De iride ("On the Rainbow"), written betwixt 1220 and 1235, mentions using optics to "read the smallest letters at incredible distances".^[23] A few years subsequently in 1262, Roger Salary is also known to have written on the magnifying backdrop of lenses.^{[24] [25]} The development of the first eyeglasses took place in northern Italia in the 2nd half of the 13th century.^[26]

Independently of the development of optical lenses, some cultures developed "sunglasses" for eye protection, without any corrective backdrop.^[27] For example, flat panes of smoky quartz were used in 12th-century China, and the Inuit have used snow goggles for eye protection.^[a]

Invention [edit]

The earliest recorded annotate on the use of lenses for optical purposes was made in 1268 past Roger Bacon, who was also the first European to have described in detail the process of making gunpowder.^[29]

The start eyeglasses were estimated to have been fabricated in northern Italian republic, most likely in Pisa, past about 1290: In a sermon delivered on 23 February 1306, the Dominican friar Giordano da Pisa (c. 1255–1311) wrote "It is not all the same twenty years since there was found the art of making eyeglasses, which make for good vision ... And it is so short a time that this new art, never before extant, was discovered. ... I saw the one who first discovered and practiced it, and I talked to him."^[thirty]

Giordano'southward colleague Friar Alessandro della Spina of Pisa (d. 1313) was soon making eyeglasses. The Aboriginal Chronicle of the Dominican Monastery of St. Catherine in Pisa records: "Eyeglasses, having outset been made by someone else, who was unwilling to share them, he [Spina] made them and shared them with everyone with a cheerful and willing eye."^[31] Venice chop-chop became an of import center of manufacture, especially due to using the high quality glass made at Murano.^[32] By 1301, there were guild regulations in Venice governing the auction of eyeglasses.^[33] and a separate society of Venetian spectacle makers was formed in 1320.^[32] In the fourteenth century they were very common objects: Francesco Petrarca says in 1 of his messages that, until he was 60, he didn't need glasses,^{[34] [35]} and Franco Sacchetti mentions them often in his Trecentonovelle.

The earliest pictorial show for the use of eyeglasses is Tommaso da Modena's 1352 portrait of the central Hugh de Provence reading in a scriptorium. Some other early example would be a delineation of eyeglasses found due north of the Alps in an altarpiece of the church of Bad Wildungen, Federal republic of germany, in 1403. These early on glasses had convex lenses that could correct both hyperopia (farsightedness), and the presbyopia that normally develops as a symptom of aging. Although concave lenses for myopia (well-nigh-sightedness) had made their first appearance in the mid-15th century,^[32] information technology was non until 1604 that Johannes Kepler published the get-go correct explanation as to why convex and concave lenses could correct presbyopia and myopia.^[b]

Early frames for glasses consisted of two magnifying glasses riveted together by the handles so that they could grip the olfactory organ. These are referred to equally "rivet spectacles". The earliest surviving examples were plant under the floorboards at Kloster Wienhausen, a convent almost Celle in Germany; they have been dated to circa 1400.^[38]

The earth's kickoff spectacle specialist shop opened in Strasbourg (so Holy Roman Empire, at present French republic) in 1466.^[39]

Other claims [edit]

The 17th century merits, by Francesco Redi, that Salvino degli Armati of Florence invented eyeglasses, in the 13th century, has been exposed as erroneous.^{[twoscore] [41]}

Marco Polo is mistakenly claimed to accept encountered eyeglasses during his travels in Red china in the 13th century. Nevertheless, no such testify appears in his accounts.^{[42] [43]} Indeed, the earliest mentions of eyeglasses in China occur in the 15th century and those Chinese sources state that eyeglasses were imported.^[44]

In 1907 Professor Berthold Laufer speculated, in his history of glasses, that for glasses to be mentioned in the literature of Red china and Europe at approximately the same time it was probable that they were not invented independently, and after ruling out the Turks, proposed Republic of india as a location.^{[45] [c]} However, Joseph Needham speculated that the mention of glasses in the Chinese manuscript Laufer used "in part" to credit the prior invention of them in Asia did non exist in older versions of that manuscript, and the reference to them in after versions was added during the Ming dynasty.^[46]

In 1971 Rishi Agarwal, in an article in the British Journal of Ophthalmology, states that Vyasatirtha was observed in possession of a pair of glasses in the 1520s, he argues that information technology "is, therefore, most likely that the use of lenses reached Europe via the Arabs, as did Hindu mathematics and the ophthalmological works of the ancient Hindu surgeon Sushruta",^[47] but all dates are given well afterwards the existence of eyeglasses in Italy was established, and there had been significant shipments of eyeglasses from Italy to the Middle East, with ane shipment as large equally 24,000 glasses.^[48]

Later developments [edit]

The American scientist Benjamin Franklin, who suffered from both myopia and presbyopia, invented bifocals. Historians have from time to time produced evidence to suggest that others may take preceded him in the invention; all the same, a correspondence between George Whatley and John Fenno, editor of The Gazette of the U.s.a., suggested that Franklin had indeed invented bifocals, and perhaps 50 years earlier than had been originally thought.^[49] The first lenses for correcting astigmatism were designed by the British astronomer George Airy in 1825.^[fifty]

Over time, the construction of frames for glasses too evolved. Early eyepieces were designed to exist either held in place by hand or past exerting pressure on the nose (pince-nez). Girolamo Savonarola suggested that eyepieces could be held in place by a ribbon passed over the wearer'southward caput, this in turn secured past the weight of a hat. The modern style of glasses, held by temples passing over the ears, was developed sometime before 1727, mayhap by the British optician Edward Scarlett. These designs were not immediately successful, however, and various styles with attached handles such as "pair of scissors-spectacles" and lorgnettes were also fashionable from the second half of the 18th century and into the early 19th century.

In the early 20th century, Moritz von Rohr and Zeiss (with the assistance of H. Boegehold and A. Sonnefeld^[51]) developed the Zeiss Punktal spherical indicate-focus lenses that dominated the eyeglass lens field for many years. In 2008, Joshua Silver designed eyewear with adaptable corrective glasses. They work by using a congenital-in syringe to pump a silicone solution into a flexible lens.^[52]

Despite the increasing popularity of contact lenses and laser corrective centre surgery, glasses remain very common, equally their technology has improved. For example, it is now possible to purchase frames fabricated of special retentiveness metal alloys that return to their correct shape afterward being bent. Other frames have spring-loaded hinges. Either of these designs offer dramatically meliorate ability to withstand the stresses of daily habiliment and the occasional accident. Modernistic frames are likewise often made from strong, light-weight materials such as titanium alloys, which were not available in earlier times.

In way [edit]

In the 1930s, "spectacles" were described as "medical appliances".^[53] Wearing spectacles was sometimes considered socially humiliating. In the 1970s, stylish glasses started to become bachelor through manufacturers, and governments too recognized the demand for stylized eyewear.^[53]

Graham Pullin describes how devices for disability, like glasses, have traditionally been designed to camouflage confronting the skin and restore power without beingness visible.^[53] In the past, design for disability has "been less near projecting a positive epitome equally about trying not to project an prototype at all".^[53] Pullin uses the case of spectacles, traditionally categorized equally a medical device for "patients", and outlines how they are at present described as eyewear: a fashionable accompaniment.^[53] Much like other style designs and accessories, eyewear is created by designers, has reputable labels, and comes in collections, by flavour and designer.^[53] In recent years information technology has become more common for consumers to purchase eyewear with non-prescription lenses as a manner accessory.^[53]

Society and culture [edit]

Market [edit]

The market for spectacles has been characterized as having highly inelastic demand. Advertizing restrictions in the Us, for case, take correlated with college prices, suggesting that adverts make the spectacles market more than cost-competitive.^[54] It has too been claimed to be monopolistically competitive, every bit in the case of Luxottica.^{[55] [56] [57]}

There are claims that insufficiently gratuitous market contest inflates the prices of frames, which cost an average of $25–$l U.South. to brand, to an average retail toll of $300 in the United states. This merits is disputed by some in the manufacture.^{[58] [59] [60]}

Redistribution [edit]

Some organizations similar Lions Clubs International,^[61] Unite For Sight,^[62] ReSpectacle,^[63] and New Eyes for the Needy provide a fashion to donate spectacles and sunglasses to people on low incomes or no income. Unite For Sight has redistributed more 200,000 Pairs.^[64]

Fashion [edit]

Glasses - Decoration, Presi HQ, Budapest

Many people require glasses for the reasons listed to a higher place. There are many shapes, colors, and materials that can be used when designing frames and lenses that can exist utilized in various combinations. Ofttimes, the selection of a frame is made based on how it will impact the appearance of the wearer. Some people with skillful natural eyesight like to habiliment eyeglasses equally a fashion accompaniment. In Nihon, some companies ban women from wearing glasses.^[65]

Personal image [edit]

For most of their history, eyeglasses were seen as unfashionable, and carried several potentially negative connotations: wearing glasses caused individuals to exist stigmatized and stereotyped as pious clergymen, as those in religious vocation were the nigh likely to be literate and therefore the most likely to need reading glasses, elderly, or physically weak and passive.^{[66] [67]} The stigma began to fall abroad in the United states of America in the early 1900s when the pop Theodore Roosevelt was regularly photographed wearing eyeglasses, and in the 1910s when popular comedian Harold Lloyd began wearing a pair of horn-rimmed spectacles every bit the "Glasses" grapheme in his films.^{[66] [67]}

In the United Kingdom, wearing glasses was characterised in the nineteenth century, as "a sure sign of the weakling and the mollycoddle", according to Neville Cardus, writing in 1928.^[68] "Tim" Killick was the first professional cricketer to play while wearing glasses "continuously", after his vision deteriorated in 1897. "With their aid he placed himself in the forefront amongst English professionals of all-round abilities."^[68]

Since eyeglasses have become an acceptable way item and oftentimes act as a key component in individuals' personal paradigm. Musicians Buddy Holly and John Lennon became synonymous with the styles of heart-glasses they wore to the point that thick, black horn-rimmed spectacles are often called "Buddy Holly glasses" and perfectly circular metal eyeglass frames chosen "John Lennon glasses" (or, more recently, "Harry Potter glasses"). British comedic player Eric Sykes was known in the United Kingdom for wearing thick, square, horn-rimmed glasses, which were, in fact, a sophisticated hearing aid that alleviated his deafness by allowing him to "hear" vibrations.^[69] Some celebrities have become and so associated with their eyeglasses that they continued to habiliment them even afterwards taking other measures against vision problems: United States Senator Barry Goldwater and comedian Drew Carey continued to habiliment not-prescription glasses after existence fitted for contacts and getting laser centre surgery, respectively.

Other celebrities have used spectacles to differentiate themselves from the characters they play, such as Anne Kirkbride, who wore oversized, 1980s-style round horn-rimmed glasses as Deirdre Barlow in the lather opera Coronation Street, and Masaharu Morimoto, who wears glasses to separate his professional persona as a chef from his stage persona every bit Iron Chef Japanese. In 2012 some NBA players wear lensless glasses with thick plastic frames like horn-rimmed glasses during post-game interviews, geek chic that draws comparisons to histrion Jaleel White'south infamous styling as Telly character Steve Urkel.^{[lxx] [71]}

In superhero fiction, eyeglasses take go a standard component of various heroes' disguises as masks, allowing them to adopt a nondescript demeanor when they are not in their superhero personae: Superman is well known for wearing 1950s manner horn-rimmed spectacles as Clark Kent, while Wonder Woman wears either round, Harold Lloyd fashion spectacles or 1970s way bug-eye glasses as Diana Prince. An example of the halo effect is seen in the stereotype that those who wear glasses are intelligent. This belief can have positive consequences for people who wear glasses, for example in elections. Studies testify that wearing spectacles increases politicians' electoral success, at least in Western cultures.^[72]

Styles [edit]

In the 20th century, eyeglasses came to exist considered a component of fashion; as such, diverse dissimilar styles have come in and out of popularity. Most are still in regular use, albeit with varying degrees of frequency.

• Aviator sunglasses
• Browline glasses
• Bug-center spectacles
• True cat eye glasses
• GI glasses
• Goggles
• Horn-rimmed glasses
• Lensless glasses
• Monocle
• Pince-nez
• Rimless glasses
• Sunglasses
• Wayfarer sunglasses
• Windsor spectacles

Encounter too [edit]

• Adjustable-focus eyeglasses
• Baden-Powell'southward unilens
• Centre examination
• Eyeglass prescription
• History of eyes
• X-ray vision
• Plurale tantum

Notes [edit]

1. ^ Chinese judges wore dark glasses to hide their facial expressions during court proceedings.^[28]
2. ^ In his treatise Ad Vitellionem paralipomena [Emendations (or Supplement) to Witelo] (1604), Kepler explained how eyeglass lenses compensate for the distortions that are acquired by presbyopia or myopia, so that the image is once again properly focused on the retina.^{[36] [37]}
3. ^ Laufer, Berthold (1907), Geschichte der Brille (PDF), vol. six, p. 26, retrieved 29 May 2019 Translation:

   I am interested in the remarks of Prof. J. HIRSCHBERG on the "History of the Invention of Glasses" published in the final result of this journal (Volume VI, pp. 221–223) and the subsequent discussion by Prof. GÜPPERT. The volume past HIRSCHBERG mentioned therein, in which his theory should be presented in particular, has not however become accessible to me. I, therefore, limit my criticism of it as far as possible and prefer to prove, past means of new material from Chinese literature, that the view of the original invention of glasses in Republic of india is the greatest probability. HIRSCHBERG theory is highly unlikely, as all previous experience has shown and contradicts analogies in cultural history and in the history of inventions in particular; Crystal spectacles announced in the European Eye Ages, in Bharat, and in Communist china, and from the historical bespeak of view one can suppose from the beginning that these inventions did non occur independently in each of these 3 cultural groups, but that a historical connection is here present.

References [edit]

1. ^ "Eyeglasses - All What Yous Need to Know", Eyewa Blog , retrieved 24 March 2020
2. ^ "Sunglasses not only an accompaniment in the Sunshine Land", Sunday-Sentinel.com , retrieved 10 April 2018
3. ^ Loria, Kevin (21 February 2017), "Calculator glasses that merits to protect your optics from screens are selling like crazy, but they probably aren't doing you lot much good", Business Insider
4. ^ Heiting, Gary, "Computer Eye Strain: 10 Steps For Relief", All nearly vision.com , retrieved ane September 2017
5. ^ "BluTech Lenses – Engineering science, The story behind BluTech Lenses", BluTech Lenses
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General bibliography [edit]

• Ilardi, Vincent (2007), Renaissance Vision from Spectacles to Telescopes, Philadelphia, Pennsylvania: American Philosophical Order, ISBN9780871692597 .
• Needham, Joseph (1962), "Part 1", Science & Civilisation in Communist china, vol. IV, Cambridge, England: Cambridge University Printing, ISBN9780521058025 .

External links [edit]

This audio file was created from a revision of this article dated 31 March 2008 (2008-03-31), and does not reflect subsequent edits.

Wikimedia Commons has media related to Spectacles.

Wikiquote has quotations related to: Glasses

• Spectacles Gallery at the British Optical Association Museum
• "Spectacles", The Medieval Technology, NYU, archived from the original on 16 October 2015, retrieved 15 June 2009 .
• "Are Your Eyes Right", Popular Science (article), February 1944 , on eyes and how eyeglasses correct vision (page 120).
• "Mutual Spectacles Styles before, during and later the Civil War" (2012 article) via the Internet Archive; Antique Eyeglasses in America.

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Source: https://en.wikipedia.org/wiki/Glasses

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