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Svyatoslav Fyodorov
Svyatoslav Nikolayevich Fyodorov (; August 8, 1927 – June 2, 2000) was a Russian ophthalmologist, politician, professor, full member of the Russian Academy of Sciences and Russian Academy of Medical Sciences. He is considered to be a pioneer of refractive surgery. He was also one of the candidates in the 1996 Russian presidential election, running as a member of the Party of Workers' Self-Government. Life and career Fyodorov was born in ''Proskurov'', Ukrainian SSR (now Khmelnytskyi, Ukraine), to ethnic Russian parents. Fyodorov graduated from Rostov Medical Institute in Rostov on Don, then worked as a practicing ophthalmologist in a small town in Rostov Oblast. Cataract surgery In the 1960s he studied the pioneering work of the English ophthalmic surgeon Sir Harold Ridley, the inventor of the intraocular lens (IOL). Fyodorov began to use Ridley's intraocular lenses in his treatment of cataract. At first he used lenses manufactured by the Rayner company in England but h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Svyatoslav Fedorov
Sviatoslav (russian: Святосла́в, Svjatosláv, ; uk, Святосла́в, Svjatosláv, ) is a Russian and Ukrainian given name of Slavic origin. Cognates include Svetoslav, Svatoslav, , Svetislav. It has a Pre-Christian pagan character and means "one who worships the light" (likely in reference to the sun). In Christian times the name's meaning started to be associated with the Proto-Slavic roots (holy) and (glory), to be explained as "One who worships the Holy". A diminutive form for Sviatoslav is Svetlyo (Bulgarian), Slava (Russian), (Polish), Slavik (Ukrainian). Its feminine form is Sviatoslava. The name may refer to: People Monarchs *Sviatoslav I of Kiev (c. 942 – 972), emperor of Rus *Sviatoslav II of Kiev (1027–1076), prince of Kiev and Chernigov *Sviatoslav III of Kiev (before 1141–1194), prince of Turov (1142 and 1154), Vladimir and Volyn (1141–1146), Pinsk (1154), Novgorod-Seversky (1157–1164), Chernigov (1164–1177), Grand Prince of Kiev (117 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Refractive Surgery
Refractive eye surgery is optional eye surgery used to improve the refractive state of the eye and decrease or eliminate dependency on glasses or contact lenses. This can include various methods of surgical remodeling of the cornea (keratomileusis), lens implantation or lens replacement. The most common methods today use excimer lasers to reshape the curvature of the cornea. Refractive eye surgeries are used to treat common vision disorders such as myopia, hyperopia, presbyopia and astigmatism. History The first theoretical work on the potential of refractive surgery was published in 1885 by Hjalmar August Schiøtz, an ophthalmologist from Norway. In 1930, the Japanese ophthalmologist Tsutomu Sato made the first attempts at performing this kind of surgery, hoping to correct the vision of military pilots. His approach was to make radial cuts in the cornea, correcting effects by up to 6 diopters. The procedure unfortunately produced a high rate of corneal degeneration, howeve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
One-party State
A one-party state, single-party state, one-party system, or single-party system is a type of sovereign state in which only one political party has the right to form the government, usually based on the existing constitution. All other parties are either outlawed or allowed to take only a limited and controlled participation in elections. Sometimes the term "''de facto'' one-party state" is used to describe a dominant-party system that, unlike the one-party state, allows (at least nominally) democratic multiparty elections, but the existing practices or balance of political power effectively prevent the opposition from winning power. Although it is predated by the 1714 to 1783 "age of the Whig oligarchy" in Great Britain, the rule of the Committee of Union and Progress (CUP) over the Ottoman Empire following the 1913 coup d'etat is often considered the first one-party state. Concept One-party states justify themselves through various methods. Most often, proponents of a one- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phakic IOL
Intraocular lens (IOL) is a lens implanted in the eye as part of a treatment for cataracts or myopia. If the natural lens is left in the eye, the IOL is known as phakic, otherwise it is a pseudophakic, or false lens. Such a lens is typically implanted during cataract surgery, after the eye's cloudy natural lens (cataract) has been removed. The pseudophakic IOL provides the same light-focusing function as the natural crystalline lens. The phakic type of IOL is placed over the existing natural lens and is used in refractive surgery to change the eye's optical power as a treatment for myopia (nearsightedness). This is an alternative to LASIK. IOLs usually consist of a small plastic lens with plastic side struts, called haptics, to hold the lens in place in the capsular bag inside the eye. IOLs were conventionally made of an inflexible material (PMMA), although this has largely been superseded by the use of flexible materials, such as silicone. Most IOLs fitted today are fixed monofo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myopia
Near-sightedness, also known as myopia and short-sightedness, is an eye disease where light focuses in front of, instead of on, the retina. As a result, distant objects appear blurry while close objects appear normal. Other symptoms may include headaches and eye strain. Severe near-sightedness is associated with an increased risk of retinal detachment, cataracts, and glaucoma. The underlying mechanism involves the length of the eyeball growing too long or less commonly the lens being too strong. It is a type of refractive error. Diagnosis is by eye examination. Tentative evidence indicates that the risk of near-sightedness can be decreased by having young children spend more time outside. This decrease in risk may be related to natural light exposure. Near-sightedness can be corrected with eyeglasses, contact lenses, or a refractive surgery. Eyeglasses are the easiest and safest method of correction. Contact lenses can provide a wider field of vision, but are associated with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cornea
The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber. Along with the anterior chamber and lens, the cornea refracts light, accounting for approximately two-thirds of the eye's total optical power. In humans, the refractive power of the cornea is approximately 43 dioptres. The cornea can be reshaped by surgical procedures such as LASIK. While the cornea contributes most of the eye's focusing power, its focus is fixed. Accommodation (the refocusing of light to better view near objects) is accomplished by changing the geometry of the lens. Medical terms related to the cornea often start with the prefix "'' kerat-''" from the Greek word κέρας, ''horn''. Structure The cornea has unmyelinated nerve endings sensitive to touch, temperature and chemicals; a touch of the cornea causes an involuntary reflex to close the eyelid. Because transparency is of prime importance, the healthy cornea does not have or need blood vessels with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rayner (company)
Rayner designs and manufactures intraocular lenses and proprietary injection devices for use in cataract surgery. With Sir Harold Ridley, they were pioneers in the field from 1949 when Ridley successfully implanted the first intraocular lens (IOL) at St Thomas' Hospital, London. The origin of the company The story of the Rayner Company begins in 1910, when Mr John Baptiste Reiner and Mr Charles Davis Keeler opened their first optician's shop at No 9, Vere Street, London, England. They registered their company as Reiner & Keeler Ltd on 30 October 1910. Before forming the company, J.B. Reiner had completed an apprenticeship in 'the art of an optician and scientific instrument maker' in 1891 and had gone on to work for E.B. Merrowitz Ltd, a branch of a well-known American optical company. In 1915, during the First World War, the company name was changed to Rayner & Keeler Ltd. This was almost certainly a commercial decision of the time as J. B. Reiner retained his name all his lif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intraocular Lens
Intraocular lens (IOL) is a lens implanted in the eye as part of a treatment for cataracts or myopia. If the natural lens is left in the eye, the IOL is known as phakic, otherwise it is a pseudophakic, or false lens. Such a lens is typically implanted during cataract surgery, after the eye's cloudy natural lens (cataract) has been removed. The pseudophakic IOL provides the same light-focusing function as the natural crystalline lens. The phakic type of IOL is placed over the existing natural lens and is used in refractive surgery to change the eye's optical power as a treatment for myopia (nearsightedness). This is an alternative to LASIK. IOLs usually consist of a small plastic lens with plastic side struts, called haptics, to hold the lens in place in the capsular bag inside the eye. IOLs were conventionally made of an inflexible material (PMMA), although this has largely been superseded by the use of flexible materials, such as silicone. Most IOLs fitted today are fixed mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harold Ridley (ophthalmologist)
Sir Nicholas Harold Lloyd Ridley (10 July 1906 – 25 May 2001) was an English ophthalmologist who invented the intraocular lens and pioneered intraocular lens surgery for cataract patients. Early years Nicholas Harold Lloyd Ridley was born in Kibworth Harcourt, Leicestershire, the son of Nicholas Charles Ridley and his wife Margaret, née Parker; he had a younger brother, Olden. Harold had a stammer which he was largely able to manage. As a child he met and sat on the lap of Florence Nightingale, a close friend of his mother. He was educated at Charterhouse School before studying at Pembroke College, Cambridge from 1924 to 1927, and completed his medical training in 1930 at St Thomas' Hospital. Subsequently, he worked as a surgeon at both St Thomas' and Moorfields Eye Hospital in London, specialising in ophthalmology. In 1938 Ridley was appointed full surgeon and consultant at Moorfields Hospital and later appointed consultant surgeon in 1946. Cataract operations and intraocu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rostov Oblast
Rostov Oblast ( rus, Росто́вская о́бласть, r=Rostovskaya oblast, p=rɐˈstofskəjə ˈobləsʲtʲ) is a federal subject of Russia (an oblast), located in the Southern Federal District. The oblast has an area of and a population of 4,277,976 ( 2010 Census), making it the sixth most populous federal subject in Russia. Its administrative center is the city of Rostov-on-Don, which also became the administrative center of the Southern Federal District in 2002. Geography Rostov Oblast borders Ukraine (Donetsk and Luhansk Oblasts) and also Volgograd and Voronezh Oblasts in the north, Krasnodar and Stavropol Krais in the south, and the Republic of Kalmykia in the east. The Rostov oblast is located in the Pontic-Caspian steppe. It is directly north over the North Caucasus and west of the Yergeni hills.Google Earth It is within the Russian Southern Federal District. Rivers and lakes The Don River, one of Europe's longest rivers, flows through the oblast for part of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rostov On Don
Rostov-on-Don ( rus, Ростов-на-Дону, r=Rostov-na-Donu, p=rɐˈstof nə dɐˈnu) is a port city and the administrative centre of Rostov Oblast and the Southern Federal District of Russia. It lies in the southeastern part of the East European Plain on the Don River, from the Sea of Azov, directly north of the North Caucasus. The southwestern suburbs of the city lie above the Don river delta. Rostov-on-Don has a population of over one million people, and is an important cultural centre of Southern Russia. History Early history From ancient times, the area around the mouth of the Don River has held cultural and commercial importance. Ancient indigenous inhabitants included the Scythian and Sarmatian tribes. It was the site of Tanais, an ancient Greek colony, Fort Tana under the Genoese, and Fort Azak in the time of the Ottoman Empire. In 1749, a custom house was established on the Temernik River, a tributary of the Don, by edict of the Empress Elizabeth, the d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Russians
, native_name_lang = ru , image = , caption = , population = , popplace = 118 million Russians in the Russian Federation (2002 ''Winkler Prins'' estimate) , region1 = , pop1 = approx. 7,500,000 (including Russian Jews and Russian Germans) , ref1 = , region2 = , pop2 = 7,170,000 (2018) ''including Crimea'' , ref2 = , region3 = , pop3 = 3,512,925 (2020) , ref3 = , region4 = , pop4 = 3,072,756 (2009)(including Russian Jews and Russian Germans) , ref4 = , region5 = , pop5 = 1,800,000 (2010)(Russian ancestry and Russian Germans and Jews) , ref5 = 35,000 (2018)(born in Russia) , region6 = , pop6 = 938,500 (2011)(including Russian Jews) , ref6 = , region7 = , pop7 = 809,530 (2019) , ref7 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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