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Snow Goggles
Snow goggles (Inuktitut: or , syllabics: or ; esu, nigaugek, ) are a type of eyewear traditionally used by the Inuit and the Yupik peoples of the Arctic to prevent snow blindness. The goggles fit tightly against the face so that the only light entering is through the slits, and soot is sometimes applied to the inside to help cut down on glare. The slits are made narrow not only to reduce the amount of light entering but also to improve the visual acuity. Wider slits result in a larger field of view. Terminology Like other Inuit language words, such as inukhuk/inuksuk, a different word may be used in different dialects. In the Kivalliq dialect, () is used, while the North Baffin dialect uses (). Both words are also used to refer to sunglasses. In Central Yup'ik, snow goggles are called , while in Cup'ig they are ''igguag''. In Siberian Yupik, the word is . See also * Pinhole glasses References {{DEFAULTSORT:Inuit Snow Goggles Goggles Snow goggles Snow goggles ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inuit Snow Goggles
Snow goggles (Inuktitut: or , syllabics: or ; esu, nigaugek, ) are a type of eyewear traditionally used by the Inuit and the Yupik peoples of the Arctic to prevent snow blindness. The goggles fit tightly against the face so that the only light entering is through the slits, and soot is sometimes applied to the inside to help cut down on glare. The slits are made narrow not only to reduce the amount of light entering but also to improve the visual acuity. Wider slits result in a larger field of view. Terminology Like other Inuit language words, such as inukhuk/inuksuk, a different word may be used in different dialects. In the Kivalliq dialect, () is used, while the North Baffin dialect uses (). Both words are also used to refer to sunglasses. In Central Yup'ik, snow goggles are called , while in Cup'ig they are ''igguag''. In Siberian Yupik, the word is . See also * Pinhole glasses References {{DEFAULTSORT:Inuit Snow Goggles Goggles Snow goggles Snow goggles ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Visual Acuity
Visual acuity (VA) commonly refers to the clarity of vision, but technically rates an examinee's ability to recognize small details with precision. Visual acuity is dependent on optical and neural factors, i.e. (1) the sharpness of the retinal image within the eye, (2) the health and functioning of the retina, and (3) the sensitivity of the interpretative faculty of the brain. The most commonly referred visual acuity is the far acuity (e.g. 6/6 or 20/20 acuity), which describes the examinee's ability to recognize small details at a far distance, and is relevant to people with myopia; however, for people with hyperopia, the near acuity is used instead to describe the examinee's ability to recognize small details at a near distance. A common cause of low visual acuity is refractive error (ametropia), errors in how the light is refracted in the eyeball, and errors in how the retinal image is interpreted by the brain. The latter is the primary cause for low vision in people with a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Goggles
Goggles, or safety glasses, are forms of protective eyewear that usually enclose or protect the area surrounding the eye in order to prevent particulates, water or chemicals from striking the eyes. They are used in chemistry laboratories and in woodworking. They are often used in snow sports as well, and in swimming. Goggles are often worn when using power tools such as drills or chainsaws to prevent flying particles from damaging the eyes. Many types of goggles are available as prescription goggles for those with vision problems. History The Inuit and Yupik peoples carved snow goggles from the antlers of caribou, wood, and shell to help prevent snow blindness. The goggles were curved to fit the user's face and had a large groove cut in the back to allow for the nose. A long thin slit was cut through the goggles to allow in a small amount of light, diminishing subsequent ultraviolet rays. The goggles were held to the head by a cord made of caribou sinew. In the early 2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinhole Glasses
Pinhole glasses, also known as stenopeic glasses, are eyeglasses with a series of pinhole-sized perforations filling an opaque sheet of plastic in place of each lens. Similar to the workings of a pinhole camera, each perforation allows only a very narrow beam of light to enter the eye which reduces the size of the circle of confusion on the retina and increases depth of field. In eyes with refractive error, the result is often a sharper image. However, a second effect may appear at the common bridge between each two adjacent holes, whereby two different rays of light coming from the same object (but each passing through a different hole) are diffracted back toward the eye and onto different places on the retina. Unlike conventional prescription glasses, pinhole glasses produce an image without the pincushion effect around the edges (which makes straight lines appear curved). While pinhole glasses are claimed to be useful for people who are both near- and far-sighted, they are not ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Central Siberian Yupik Language
Central Siberian Yupik, (also known as Siberian Yupik, Bering Strait Yupik, Yuit, Yoit, "St. Lawrence Island Yupik", and in Russia "Chaplinski Yupik" or Yuk) is an endangered Yupik language spoken by the indigenous Siberian Yupik people along the coast of Chukotka in the Russian Far East and in the villages of Savoonga and Gambell on St. Lawrence Island. The language is part of the Eskimo-Aleut language family. In Alaska, it is estimated that fewer than 1000 of the 1200 residents of St. Lawrence Island speak the language, while, in Russia, approximately 200 speakers remain out of an ethnic population of 1,200. Dialects and subgroups Siberian Yupik has two dialects: Chaplino (Chaplinski) Yupik (Uŋazigmit) is spoken on the shores of Chukotka Autonomous Okrug in the Russian Far North, and St. Lawrence Island Yupik (Sivuqaghmiistun) is spoken on St. Lawrence Island, Alaska. Chaplino, or ''Uŋazigmit'', is the largest Yupik language of Siberia (the second one is Naukan Yupik ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yup'ik Language
The Yup'ik or Yupiaq (sg & pl) and Yupiit or Yupiat (pl), also Central Alaskan Yup'ik, Central Yup'ik, Alaskan Yup'ik ( own name ''Yup'ik'' sg ''Yupiik'' dual ''Yupiit'' pl; russian: Юпики центральной Аляски), are an Indigenous people of western and southwestern Alaska ranging from southern Norton Sound southwards along the coast of the Bering Sea on the Yukon-Kuskokwim Delta (including living on Nelson and Nunivak Islands) and along the northern coast of Bristol Bay as far east as Nushagak Bay and the northern Alaska Peninsula at Naknek River and Egegik Bay. They are also known as Cup'ik by the Chevak Cup'ik dialect-speaking people of Chevak and Cup'ig for the Nunivak Cup'ig dialect-speaking people of Nunivak Island. Both Chevak Cup'ik and Nunivak Cup'ig people are also known as ''Cup'ik.'' [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sunglasses
Sunglasses or sun glasses (informally called shades or sunnies; more names below) are a form of protective eyewear designed primarily to prevent bright sunlight and high-energy visible light from damaging or discomforting the eyes. They can sometimes also function as a visual aid, as variously termed spectacles or glasses exist, featuring lenses that are colored, polarized or darkened. In the early 20th century, they were also known as sun cheaters (cheaters then being an American slang term for glasses). Since the 1930s, sunglasses have been a popular fashion accessory, especially on the beach. The American Optometric Association recommends wearing sunglasses that block ultraviolet radiation (UV) whenever a person is in the sunlight to protect the eyes from UV and blue light, which can cause several serious eye problems. Their usage is mandatory immediately after some surgical procedures, such as LASIK, and recommended for a certain time period in dusty areas, when leaving ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Baffin Dialect
The North Baffin dialect (''Qikiqtaaluk uannangani'' or ''Iglulingmiut'') of Inuktitut is spoken on the northern part of Baffin Island, at Igloolik and the adjacent part of the Melville Peninsula, and in other Inuit communities in the far north of Nunavut, like Resolute, Grise Fiord, Pond Inlet, Clyde River, and Arctic Bay. The governments of Nunavut and the Northwest Territories generally consider it to be a dialect of Inuktitut, due to its location in Nunavut, as do some linguists, but it is instead sometimes classified as a dialect of Inuvialuktun. However, Inuktitut and Inuvialuktun form a dialect continuum A dialect continuum or dialect chain is a series of Variety (linguistics), language varieties spoken across some geographical area such that neighboring varieties are Mutual intelligibility, mutually intelligible, but the differences accumulat ... with few sharp boundaries. The North Baffin dialect is the spoken in the film '' Atanarjuat: The Fast Runner''. Referen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kivalliq Region
The Kivalliq Region (; Inuktitut syllabics: ᑭᕙᓪᓕᖅ ) is an administrative region of Nunavut, Canada. It consists of the portion of the mainland to the west of Hudson Bay together with Southampton Island and Coats Island. The regional centre is Rankin Inlet. The population was 10,413 in the 2016 Census, an increase of 16.3% from the 2011 Census. Before 1999, Kivalliq Region existed under slightly different boundaries as Keewatin Region, Northwest Territories. Although the Kivalliq name became official in 1999, Statistics Canada has continued to refer to the area as Keewatin Region, Nunavut in publications such as the Census. Most references to the area as "Keewatin" have generally been phased out by Nunavut-based bodies, as that name was originally rooted in a region of northwestern Ontario derived from a Cree dialect, and only saw application onto Inuit-inhabited lands because of the boundaries of the now-defunct District of Keewatin. Geology The Kivalliq Region i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inuksuk
An inuksuk (plural inuksuit) or inukshuk (from the iu, ᐃᓄᒃᓱᒃ, plural ; alternatively in Inuinnaqtun, in Iñupiaq, in Greenlandic) is a type of stone landmark or cairn built by, and for the use of, Inuit, Iñupiat, Kalaallit, Yupik, and other peoples of the Arctic region of North America. These structures are found in northern Canada, Greenland, and Alaska (United States). This combined region, north of the Arctic Circle, is dominated by the tundra biome and has areas with few natural landmarks. The inuksuk may historically have been used for navigation, as a point of reference, a marker for travel routes, fishing places, camps, hunting grounds, places of veneration, drift fences used in hunting, or to mark a food cache. The Iñupiat in northern Alaska used inuksuit to assist in the herding of caribou into contained areas for slaughter. Varying in shape and size, the inuksuit have ancient roots in Inuit culture. Historically, the most common types of inuksuit are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inuit Languages
The Inuit languages are a closely related group of indigenous American languages traditionally spoken across the North American Arctic and adjacent subarctic, reaching farthest south in Labrador. The related Yupik languages (spoken in western and southern Alaska, as well as in nearby Russia's farthest east, though severely endangered there) are the two main branches of Eskaleut, a primary language family. The Inuit live primarily in three countries: Greenland (Kingdom of Denmark), Canada (specifically in Nunavut, Northwest Territories, the Nunavik region of Quebec, and the Nunatsiavut and Nunatuĸavut regions of Labrador), and the United States (specifically the coast of Alaska). The total population of Inuit speaking their traditional languages is difficult to assess with precision, since most counts rely on self-reported census data that may not accurately reflect usage or competence. Greenland census estimates place the number of speakers of varieties of Inuit languages th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Field Of View
The field of view (FoV) is the extent of the observable world that is seen at any given moment. In the case of optical instruments or sensors it is a solid angle through which a detector is sensitive to electromagnetic radiation. Humans and animals In the context of human and primate vision, the term "field of view" is typically only used in the sense of a restriction to what is visible by external apparatus, like when wearing spectacles or virtual reality goggles. Note that eye movements are allowed in the definition but do not change the field of view when understood this way. If the analogy of the eye's retina working as a sensor is drawn upon, the corresponding concept in human (and much of animal vision) is the visual field. It is defined as "the number of degrees of visual angle during stable fixation of the eyes".Strasburger, Hans; Pöppel, Ernst (2002). Visual Field. In G. Adelman & B.H. Smith (Eds): ''Encyclopedia of Neuroscience''; 3rd edition, on CD-ROM. El ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
