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  • Patients
  • Patients changing to 1-DAY ACUVUE® TRUEYE will regain incredible white eyes and comfort at the end of the day because the super wet and super smooth surface has the lowest friction coefficient of any daily disposable lens on the market today - even exceeding 1-Day Moist - this is fantastic news for lens wearers tolerating gritty pink eyes after a long day. (thecontactlensshop.com)
  • telephoto lenses
  • Lenses suited for traditional portrait photography are medium telephoto lenses, in the 85mm-135mm range, which provide the desired perspective distortion in head and shoulders shots (compressing facial features), and have fast aperture, of f/2.8 or faster, to allow shallow depth of field, focusing attention on the subject. (wikipedia.org)
  • A fast lens speed is desirable in taking pictures in dim light, or with long telephoto lenses and for controlling depth of field and bokeh, especially in portrait photography, and for sports photography and photojournalism. (wikipedia.org)
  • index of refract
  • The term is also used to refer to other lenses that provide a negative index of refraction. (wikipedia.org)
  • mathrm {NA} _{\text{max}}}}={\frac {1}{2\,n\sin \theta }}} where NAmax is the largest possible numerical aperture, n is the index of refraction of the medium behind the lens, most often air where n = 1, θ is the half-angle of the maximum cone of light that can reach the film or sensor. (wikipedia.org)
  • optics
  • IDEX completes takeover of CVI Melles Griot http://optics.org/news/2/6/14 Vivitar List of photographic equipment makers What do you think of KIRON lenses? (wikipedia.org)
  • In nano-optics, a plasmonic lens generally refers to a lens for surface plasmon polaritons (SPPs), i.e. a device that redirects SPPs to converge towards a single focal point. (wikipedia.org)
  • In 2014 a flat lens was announced that combined composite metamaterials and transformation optics. (wikipedia.org)
  • Specifically, ever smaller sizes as well as thinner thicknesses of micro lenses are highly needed for subwavelength optics or nano-optics with extremely small structures, particularly for visible and near-IR applications. (wikipedia.org)
  • Weak
  • 2. Weak lensing: where the distortions of background sources are much smaller and can only be detected by analyzing large numbers of sources in a statistical way to find coherent distortions of only a few percent. (wikipedia.org)
  • Since galaxies are intrinsically elliptical and the weak gravitational lensing signal is small, a very large number of galaxies must be used in these surveys. (wikipedia.org)
  • These weak lensing surveys must carefully avoid a number of important sources of systematic error: the intrinsic shape of galaxies, the tendency of a camera's point spread function to distort the shape of a galaxy and the tendency of atmospheric seeing to distort images must be understood and carefully accounted for. (wikipedia.org)
  • Weak lensing effects are being studied for the cosmic microwave background as well as galaxy surveys. (wikipedia.org)
  • Despite its weak reflectance (R = 0.25π2 α 2 at T = 1.3 × 10-4 K), graphene has utility as a lens for Fresnel zone plates. (wikipedia.org)
  • aberrations
  • In order to satisfactorily correct for aberrations, multi-element lenses must be used in order to use subsequent elements to correct for defects introduced by earlier elements. (gsu.edu)
  • parfocal
  • These are practical because of auto-focus, and because the camera processor can automatically adjust the lens to keep it in focus while changing focal length ("zooming") making operation practically indistinguishable from a parfocal zoom. (wikipedia.org)
  • focuses
  • The term "plasmonic lens" is also sometimes used to describe something different: Any free-space lens (i.e., a lens that focuses free-space light, rather than SPPs), that has something to do with plasmonics. (wikipedia.org)
  • An einzel lens is an electrostatic lens that focuses without changing the energy of the beam. (wikipedia.org)
  • disposable
  • Lenses come in two main varieties: daily wear or vial contacts that you continue to use day-in and day-out and disposable lenses that you wear for a specific period of time before throwing them away and using a new pair. (walgreens.com)
  • typically
  • When compared with spectacles, contact lenses typically provide better peripheral vision, and do not collect moisture (from rain, snow, condensation etc.) or perspiration. (wikipedia.org)
  • Additionally, there are conditions such as keratoconus and aniseikonia that are typically corrected better with contact lenses than with glasses. (wikipedia.org)
  • manufacture
  • This enabled the manufacture of lenses that, for the first time, conformed to the actual shape of the eye. (wikipedia.org)
  • Excavations at Fröjel on Gotland in 1999 discovered evidence of local manufacture of beads and lenses from rock crystal, with unworked pieces of crystal coexisting with partially finished beads and lenses. (wikipedia.org)
  • Kino Precision was founded in 1959 by Tatsuo Kataoka to manufacture lenses for 8mm movie cameras. (wikipedia.org)
  • The increasing cost of quality lens manufacture in Japan led to a loss of sales for Kiron, as the company could no longer offer its lenses at a cost less than that charged by the camera manufacturers, who had begun to offer economy-level lens designs as well as contracting lens assembly operations in lower-cost factories outside Japan. (wikipedia.org)
  • This is because lenses with larger maximum apertures require greater care with regard to design, precision of manufacture, special coatings and quality of glass. (wikipedia.org)
  • optical
  • Please be aware that Brothersoft do not supply any crack, patches, serial numbers or keygen for Optical Lenses,and please consult directly with program authors for any problem with Optical Lenses. (brothersoft.com)
  • Others wear contact lenses for functional or optical reasons. (wikipedia.org)
  • Wray (Optical Works) Ltd. was a British camera and lens manufacturer based in Ashgrove Road Bromley, Kent. (wikipedia.org)
  • The company was set up as a U.S. subsidiary of Kino Precision Industries Limited, Tokyo, Japan and registered as a trademark on Jan 25 1980, in order to market manually focused film camera optical lenses to the United States. (wikipedia.org)
  • Kiron soon became known as one of the very few after-market lens manufacturers that could supply products equal to or even exceeding the optical and mechanical quality of the original manufacturer. (wikipedia.org)
  • Play media Play media Play media Unlike an optical lens, a gravitational lens produces a maximum deflection of light that passes closest to its center, and a minimum deflection of light that travels furthest from its center. (wikipedia.org)
  • With the advances in micro- and nanofabrication techniques, continued miniaturization of the conventional optical lenses has always been requested for various applications such as communications, sensors, data storage, and a wide range of other technology-driven and consumer-driven industries. (wikipedia.org)
  • Also, as the distance scale for optical communications shrinks, the required feature sizes of micro lenses are rapidly pushed down. (wikipedia.org)
  • The distinct advantage of the GO flat lens is that phase modulation and amplitude modulation can be achieved simultaneously, which are attributed to the giant refractive index modulation and the variable linear optical absorption of GO during its reduction process, respectively. (wikipedia.org)
  • What is considered "fast" has evolved to lower f-numbers over the years, due to advances in lens design, optical manufacturing, quality of glass, optical coatings, and the move toward smaller imaging formats. (wikipedia.org)
  • For instance, it can guide electrons emitted from a sample to an electron analyzer, analogous to the way an optical lens assists in the transport of light in an optical instrument. (wikipedia.org)
  • Systems of electrostatic lenses can be designed in the same way as optical lenses, so electrostatic lenses easily magnify or converge the electron trajectories. (wikipedia.org)
  • Unlike the paths in an electrostatic lens, the paths in a magnetic lens contain a spiraling component, i.e. the charged particles spiral around the optical axis. (wikipedia.org)
  • This makes it possible to design and build more compact magnetic lenses with well defined optical properties. (wikipedia.org)
  • Graphene applications as optical lenses. (wikipedia.org)
  • The optical tunability resulting from gating and electrostatic doping (also known as charge plasma doping) lends to the application of graphene as ultra-broadband photodetectors in lenses. (wikipedia.org)
  • electromagnetic
  • Gravitational lenses act equally on all kinds of electromagnetic radiation, not just visible light. (wikipedia.org)
  • Flat lenses employ metamaterials, that is, electromagnetic structures engineered on subwavelength scales to elicit tailored polarization responses. (wikipedia.org)
  • Focusing
  • Focusing on contact lens safety. (cdc.gov)
  • Focusing Surface Plasmons with a Plasmonic Lens" (free PDF download). (wikipedia.org)
  • 2008-10-22 "A Plasmonic Dimple Lens for Nanoscale Focusing of Light" doi: 10.1021/nl9016368 Xu, T. (wikipedia.org)
  • The focusing intensities and the focal length can be controlled effectively by varying the laser powers and the lens sizes, respectively. (wikipedia.org)
  • The cylinder lens consists of defocusing lens, a focusing lens and a second defocusing lens, with the sum of their refractive powers being zero. (wikipedia.org)
  • But because there is some distance between the lenses, the electron makes three turns and hits the focusing lens at a position farther away from the axis and so travels through a field with greater strength. (wikipedia.org)
  • people
  • The people who will make your glasses for you need these numbers to create lenses that will correct the way your eye bends light. (kidshealth.org)
  • More than 30 million people in the U.S. wear contact lenses 1, 2 . (cdc.gov)
  • Contact lenses can help people see better without affecting their appearance or interfering with many sports and activities. (cdc.gov)
  • In 2004, it was estimated that 125 million people worldwide use contact lenses, including 28 to 38 million in the United States. (wikipedia.org)
  • People choose to wear contact lenses for many reasons. (wikipedia.org)
  • Trifocals are becoming rarer as more people choose to wear progressive lenses. (wikipedia.org)
  • The following people contributed to Lenses Alien: Joseph D'Agostino - guitar, vocals Brian Hamilton - keyboards, vocals Matthew Miller - percussion, drums Matthew Whipple - bass guitar, vocals, guitar (baritone) Heide Vanderlee - cello John Agnello - producer, engineer Greg Calbi - mastering Ted Young - engineer Theo Aronson - engineer Jeremy Withers - layout Cymbals Eat Guitars: lenses alien. (wikipedia.org)
  • made
  • Rigid, or hard, contact lenses made from plastic were first produced in the U.S. between 1938-1940 5 . (cdc.gov)
  • In 1801, Thomas Young made a pair of basic contact lenses based on Descartes' model. (wikipedia.org)
  • These lenses were made from heavy blown glass and were 18-21 mm (0.71-0.83 in) in diameter. (wikipedia.org)
  • The Visby lenses are a collection of lens-shaped manufactured objects made of rock crystal (quartz) found in several Viking graves on the island of Gotland, Sweden, and dating from the 11th or 12th century. (wikipedia.org)
  • Wray also made aerial reconnaissance lenses. (wikipedia.org)
  • Trifocal lenses are made in similar styles to bifocals, but with an additional segment for intermediate vision above the reading section. (wikipedia.org)
  • Made from various parts found around the factory (the lenses came from a darkroom condenser enlarger), the claimed speed and focal lengths were purely nominal and it wasn't usable for photography. (wikipedia.org)
  • A film made of cylindrical lenses molded in a plastic substrate as shown in above picture, can be applied to the inside of standard glasses to correct for diplopia. (wikipedia.org)
  • Subwavelength
  • Due to the enhanced wavefront shaping capability, the lens thickness is pushed down to subwavelength scale (~200 nm), which is thinner than all current dielectric lenses (~ µm scale). (wikipedia.org)
  • light
  • Farsightedness, or hyperopia, is the opposite of myopia, with distant vision being sharper than close vision but, in this case, the cornea and lens do not bend the light rays enough, so that they reach the retina before they come into sharp focus-again, giving a blurred focus. (innerbody.com)
  • A gravitational lens is a distribution of matter (such as a cluster of galaxies) between a distant light source and an observer, that is capable of bending the light from the source as the light travels towards the observer. (wikipedia.org)
  • If the (light) source, the massive lensing object, and the observer lie in a straight line, the original light source will appear as a ring around the massive lensing object. (wikipedia.org)
  • In 2007, a novel, or technologically new, plasmonic lens was proposed by modulating light through a metallic film with arrayed nano-slits, which have constant depth but variant widths. (wikipedia.org)
  • Light captured at the very edges of a curved glass lens does not line up correctly with the rest of the light, creating a fuzzy image at the edge of the frame. (wikipedia.org)
  • In this case, the purpose of the lenses is to focus more of the light into a horizontal beam and allow less of the light to escape above and below the plane of the viewer. (wikipedia.org)
  • These devices concentrate light reflected off a lens onto a singular point8 (figure 4). (wikipedia.org)
  • It has been shown that graphene lenses effectively concentrate light of ʎ = 850 nm onto a single point 120 um away from the Fresnel zone plate8 (figure 5). (wikipedia.org)
  • thickness
  • The best example of the lenses measures 50 mm (2.0 in) in diameter and has a thickness of 30 mm (1.2 in) at its centre, with an angular resolution of 25-30 μm. (wikipedia.org)
  • As a result, the overall lens thickness can be potentially reduced by more than ten times. (wikipedia.org)
  • To limit the great thickness and weight that such high-power lenses would otherwise require, all the power of the lens is concentrated in a small area in the center. (wikipedia.org)
  • image
  • There's a feature on the K20 D where if you install a lens that doesn't have all the digital bells and whistles, a message comes up on the monitor to set the focal lenght of the lens and the Image Stabiliser will work with it. (ephotozine.com)
  • The maximum exposure time in free-hand photography can be enhanced even more also for fast lenses, if the camera is equipped with an image stabilisation system. (wikipedia.org)
  • In 2014 Panasonic introduced the fastest lens with in-built stabilisation, the Leica Nocticron 42.5 mm f/1.2, which in the meantime even can be operated with dual image stabilisation (Dual I.S.), provided that the camera body has an additional stabilising system at the image sensor, too. (wikipedia.org)
  • The most common example is the lenses used in lenticular printing, where the technology is used to give an illusion of depth, or to make images that appear to change or move as the image is viewed from different angles. (wikipedia.org)
  • Lenticular printing is a multi-step process consisting of creating a lenticular image from at least two existing images, and combining it with a lenticular lens. (wikipedia.org)
  • As a consequence, the image formed by a magnetic lens is rotated relative to the object. (wikipedia.org)
  • spectacles
  • As of 2010[update], a number of manufacturers were developing auto-stereoscopic high definition 3D televisions, using lenticular lens systems to avoid the need for special spectacles. (wikipedia.org)
  • Walgreens
  • Walgreens makes purchasing and re-ordering contacts easier than ever with a wide selection of lenses that can be shipped to your home. (walgreens.com)
  • case
  • The lensing object may be stars in the Milky Way in one typical case, with the background source being stars in a remote galaxy, or, in another case, an even more distant quasar. (wikipedia.org)
  • The effect is small, such that (in the case of strong lensing) even a galaxy with a mass more than 100 billion times that of the Sun will produce multiple images separated by only a few arcseconds. (wikipedia.org)
  • In this case, rather than transparent lenses, the shapes formed are tiny curved reflectors. (wikipedia.org)
  • diameter
  • By using oil immersion high NA objective during DLW process, 300 nm fabrication feature size on GO film has been realized, and therefore the minimum lens size has been shrink down to 4.6 µm in diameter, which is the smallest planar micro lens and can only be realized with metasurface by FIB. (wikipedia.org)
  • Ultimately, the speed of a lens is limited by mechanical constraints of the camera system (shutter or mirror clearance, mount diameter). (wikipedia.org)
  • concentrate
  • By 1988, the company decided to discontinue after-market 35mm camera lens production to concentrate on industrial and other markets. (wikipedia.org)
  • successfully
  • However, after the positive reception from consumers on Vivitar Series 1 lenses, and as Vivitar was using other Japanese lens manufacturers to produce Vivitar brand lenses, the company believed the time was right to successfully market lenses to fit existing 35mm Japanese film cameras under their own brand, Kiron. (wikipedia.org)
  • Several
  • Several standard lens combinations have been developed. (gsu.edu)
  • Contact lenses are one of several effective options. (cdc.gov)
  • According to Schmidt and his co-workers, it is clear that the craftsmen worked by trial and error, since the mathematics to calculate the best form for a lens were not discovered until several hundred years later. (wikipedia.org)
  • Canon makes several lenses for the EF lens mount and EF-S lens mount that are well-suited for portrait photography. (wikipedia.org)
  • A cylinder lens consists of several cylinders whose sides are thin walls. (wikipedia.org)
  • condenser
  • Another smaller lens acts as a condenser and can be positioned by means of a sliding mechanism along a supporting track. (wikipedia.org)
  • camera
  • My lenses are high quality and I wish to use them on any camera I purchase. (ephotozine.com)
  • Lenses that fit these criteria on a full-frame camera are: EF 85mm f/1.2L II EF 85mm f/1.8 EF 100mm f/2 EF 100mm f/2.8 Macro EF 135mm f/2L EF 135mm f/2.8 with Softfocus The EF 135mm f/2.8 with Softfocus is of particular note, as it includes soft focus, which is often a desirable effect in glamour photography. (wikipedia.org)
  • quality
  • The size, roots in scientific research and long history of providing quality products allow CooperVision to stand out among other lens manufacturers. (walgreens.com)
  • The company had a reputation for producing excellent quality lenses and durable quality cameras including models such as the Wrayflex. (wikipedia.org)
  • Especially outside of the "normal lenses", lens speed also tends to correlate with the price and/or quality of the lens. (wikipedia.org)
  • novel
  • As a result, a novel ultrathin planar lens on a GO thin film has been realized recently using the DLW method. (wikipedia.org)
  • shapes
  • By measuring the shapes and orientations of large numbers of distant galaxies, their orientations can be averaged to measure the shear of the lensing field in any region. (wikipedia.org)
  • correctly
  • The diagram at right shows in green the most extreme ray within the lenticular lens that will be refracted correctly by the lens. (wikipedia.org)
  • correct
  • Lenticular eyeglass lenses have been employed to correct extreme hyperopia (farsightedness), a condition often created by cataract surgery when lens implants are not possible. (wikipedia.org)
  • eyes
  • The optometrist will determine what strength of lenses is ideal for your needs and what size lenses will best fit your eyes. (walgreens.com)
  • He or she will also discuss your lifestyle and daily habits with you to help determine which variety of contact lenses will be the most convenient for you to use and will be the safest option for your eyes. (walgreens.com)
  • This keeps moisture locked into the lenses, reducing the likelihood of dry eyes while allowing the contacts to be softer and more comfortable than traditional lenses. (walgreens.com)
  • The technology has allowed CooperVision to receive the only FDA approval for contact lenses intended for individuals with contact lens-related dry eyes. (walgreens.com)
  • provide
  • The Visby lenses provide evidence that sophisticated lens-making techniques were being used by craftsmen over 1,000 years ago, at a time when researchers had only just begun to explore the laws of refraction. (wikipedia.org)
  • When used with DSLRs with cropped sensors, notably the APS-C-sized sensor with 1.6 crop factor (such as the popular Canon EOS 600D, also known as the "Digital Rebel T3i" or "EOS Kiss Digital X5"), one instead uses 50mm-85mm lenses, as these provide a 35 mm equivalent focal length of 80mm-136mm. (wikipedia.org)
  • A flat lens is a lens whose flat shape allows it to provide distortion-free imaging, potentially with arbitrarily-large apertures. (wikipedia.org)
  • German
  • In 1888, German ophthalmologist Adolf Gaston Eugen Fick constructed and fitted the first successful contact lens. (wikipedia.org)
  • Jewellery as Form of Personal Expression (includes picture of a silver mounted lens) Die Visby-Linsen (German, includes pictures of all the lenses found at Visby) Institut für Augenoptik Aalen, Projekte & Aktivitäten, Visby Linsen (German) Der Zeit voraus: Asphärische Linsen aus dem 11. (wikipedia.org)
  • Feature
  • Probably the most sophisticated lens produced by Wray was a 135mm f4.5 which has the unusual feature of a triple correction for astigmatism. (wikipedia.org)
  • Focus
  • An electrostatic lens can also be used to focus an ion beam, for example to make a microbeam for irradiating individual cells. (wikipedia.org)