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Shinobu Ishihara
Shinobu Ishihara (石原 忍, ''Ishihara Shinobu'', Tokyo, September 25, 1879 – Izu Peninsula, January 3, 1963) was a Japanese ophthalmologist who created the Ishihara color test to detect colour blindness. He was an army surgeon. Early life and career Ishihara graduated from medicine in 1905 on a military scholarship and immediately joined the Imperial Japanese Army as a doctor, serving mainly as a surgeon. He later changed specialties to ophthalmology. In 1908 he returned to the University of Tokyo where he dedicated himself to ophthalmic research. In 1910 he became an instructor at the Army Medical College. There, in addition to seeing patients, he conducted research on "battlefield ophthalmology" and how to select superior soldiers. While working at the Military Medical School he was asked to devise a test to screen military recruits for abnormalities of color vision. His assistant was a color blind physician who helped him test the plates. The first charts were hand p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tokyo
Tokyo (; ja, 東京, , ), officially the Tokyo Metropolis ( ja, 東京都, label=none, ), is the capital and largest city of Japan. Formerly known as Edo, its metropolitan area () is the most populous in the world, with an estimated 37.468 million residents ; the city proper has a population of 13.99 million people. Located at the head of Tokyo Bay, the prefecture forms part of the Kantō region on the central coast of Honshu, Japan's largest island. Tokyo serves as Japan's economic center and is the seat of both the Japanese government and the Emperor of Japan. Originally a fishing village named Edo, the city became politically prominent in 1603, when it became the seat of the Tokugawa shogunate. By the mid-18th century, Edo was one of the most populous cities in the world with a population of over one million people. Following the Meiji Restoration of 1868, the imperial capital in Kyoto was moved to Edo, which was renamed "Tokyo" (). Tokyo was devastate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eight Ishihara Charts For Testing Colour Blindness, Europe Wellcome L0059158
8 is a number, numeral, and glyph. 8 or eight may also refer to: Years * AD 8, the eighth year of the AD era * 8 BC, the eighth year before the AD era Art *The Eight (Ashcan School), a group of twentieth century painters associated with the Ashcan School *The Eight (painters), an avant-garde art movement of Hungarian painters Motor vehicles *Bentley Eight, Bentley's "entry-level" offering from 1984 until 1992 *Leyland Eight, a luxury car produced by Leyland Motors from 1920 to 1923 *Mercury Eight, a first Post War Mercury car design *Morris Eight, a small car inspired by the Ford Model Y *Standard Eight, a small car produced by Standard Motor Company 1938–59 *Wolseley Eight, a four-door, light saloon car produced by Wolseley Motors Limited from 1946 to 1948 *Straight eight, automobile engine *Eight cylinder, automobile engine Sports *Eight (rowing), rowing boat used in the sport of competitive rowing *Figure 8 (belay device), rock climbing equipment also known as an "eight ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japanese Generals
Japanese may refer to: * Something from or related to Japan, an island country in East Asia * Japanese language, spoken mainly in Japan * Japanese people, the ethnic group that identifies with Japan through ancestry or culture ** Japanese diaspora, Japanese emigrants and their descendants around the world * Japanese citizens, nationals of Japan under Japanese nationality law ** Foreign-born Japanese, naturalized citizens of Japan * Japanese writing system, consisting of kanji and kana * Japanese cuisine, the food and food culture of Japan See also * List of Japanese people * * Japonica (other) * Japonicum * Japonicus * Japanese studies Japanese studies (Japanese: ) or Japan studies (sometimes Japanology in Europe), is a sub-field of area studies or East Asian studies involved in social sciences and humanities research on Japan. It incorporates fields such as the study of Japanese ... {{disambiguation Language and nationality disambiguation pages ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Color Scientists
Color (American English) or colour (British English) is the visual perceptual property deriving from the spectrum of light interacting with the photoreceptor cells of the eyes. Color categories and physical specifications of color are associated with objects or materials based on their physical properties such as light absorption, reflection, or emission spectra. By defining a color space, colors can be identified numerically by their coordinates. Because perception of color stems from the varying spectral sensitivity of different types of cone cells in the retina to different parts of the spectrum, colors may be defined and quantified by the degree to which they stimulate these cells. These physical or physiological quantifications of color, however, do not fully explain the psychophysical perception of color appearance. Color science includes the perception of color by the eye and brain, the origin of color in materials, color theory in art, and the physics of electromag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1963 Deaths
Events January * January 1 – Bogle–Chandler case: Commonwealth Scientific and Industrial Research Organisation scientist Dr. Gilbert Bogle and Mrs. Margaret Chandler are found dead (presumed poisoned), in bushland near the Lane Cove River, Sydney, Australia. * January 2 – Vietnam War – Battle of Ap Bac: The Viet Cong win their first major victory. * January 9 – A total penumbral lunar eclipse is visible in the Americas, Europe, Africa, and Asia, and is the 56th lunar eclipse of Lunar Saros 114. Gamma has a value of −1.01282. It occurs on the night between Wednesday, January 9 and Thursday, January 10, 1963. * January 13 – 1963 Togolese coup d'état: A military coup in Togo results in the installation of coup leader Emmanuel Bodjollé as president. * January 17 – A last quarter moon occurs between the penumbral lunar eclipse and the annular solar eclipse, only 12 hours, 29 minutes after apogee. * January 19 – Soviet spy Gheorghe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1879 Births
Events January–March * January 1 – The Specie Resumption Act takes effect. The United States Note is valued the same as gold, for the first time since the American Civil War. * January 11 – The Anglo-Zulu War begins. * January 22 – Anglo-Zulu War – Battle of Isandlwana: A force of 1,200 British soldiers is wiped out by over 20,000 Zulu warriors. * January 23 – Anglo-Zulu War – Battle of Rorke's Drift: Following the previous day's defeat, a smaller British force of 140 successfully repels an attack by 4,000 Zulus. * February 3 – Mosley Street in Newcastle upon Tyne (England) becomes the world's first public highway to be lit by the electric incandescent light bulb invented by Joseph Swan. * February 8 – At a meeting of the Royal Canadian Institute, engineer and inventor Sandford Fleming first proposes the global adoption of standard time. * March 3 – United States Geological Survey is founded. * March 11 – Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Von Hess
Carl von Hess (7 March 1863, in Mainz – 28 June 1923, in Possenhofen) was a German ophthalmologist known for his work in ocular physiology. He studied medicine at the universities of Heidelberg, Bonn and Strasbourg, then traveled to Prague, where he worked with ophthalmologist Hubert Sattler and physiologist Ewald Hering. In 1891 he obtained his habilitation from the University of Leipzig, and later on, he held professorships at the universities of Marburg (from 1896), Würzburg (from 1900) and Munich (from 1912).Hess, Carl von (bayerischer Personaladel 1912) at He made significant contributions in his studies of |
Theodor Axenfeld
Karl Theodor Paul Polykarpus Axenfeld (24 June 1867 – 29 July 1930) was a German ophthalmologist born in Smyrna (İzmir) in the Ottoman Empire to a German minister, who was a Jewish convert to Christianity and served as missionary in Asia Minor. As a child his family moved back to Germany, settling in the town of Godesberg. He received his medical doctorate in 1890 from the University of Marburg. In 1896 he became an assistant to Wilhelm Uhthoff (1853–1927) at Breslau, and during the following year, was appointed director of the university eye clinic in Rostock. In 1901 he attained the chair of ophthalmology in Freiburg, where he remained until his death in 1930. In 1925 he was chosen as president of the German Ophthalmological Society (''Deutsche ophthalmologische Gesellschaft''). Publications and research Axenfeld was involved in all aspects of ophthalmology and is associated with almost 200 written works involving the eye, including an important textbook of ophthalmology ti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imperial University Of Tokyo
, abbreviated as or UTokyo, is a public research university located in Bunkyō, Tokyo, Japan. Established in 1877, the university was the first Imperial University and is currently a Top Type university of the Top Global University Project by the Japanese government. UTokyo has 10 faculties, 15 graduate schools and enrolls about 30,000 students, about 4,200 of whom are international students. In particular, the number of privately funded international students, who account for more than 80%, has increased 1.75 times in the 10 years since 2010, and the university is focusing on supporting international students. Its five campuses are in Hongō, Komaba, Kashiwa, Shirokane and Nakano. It is considered to be the most selective and prestigious university in Japan. As of 2021, University of Tokyo's alumni, faculty members and researchers include seventeen prime ministers, 18 Nobel Prize laureates, four Pritzker Prize laureates, five astronauts, and a Fields Medalist. History ... [...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] |
Trachoma
Trachoma is an infectious disease caused by bacterium ''Chlamydia trachomatis''. The infection causes a roughening of the inner surface of the eyelids. This roughening can lead to pain in the eyes, breakdown of the outer surface or cornea of the eyes, and eventual blindness. Untreated, repeated trachoma infections can result in a form of permanent blindness when the eyelids turn inward. The bacteria that cause the disease can be spread by both direct and indirect contact with an affected person's eyes or nose. Indirect contact includes through clothing or flies that have come into contact with an affected person's eyes or nose. Children spread the disease more often than adults. Poor sanitation, crowded living conditions, and not enough clean water and toilets also increase spread. Efforts to prevent the disease include improving access to clean water and treatment with antibiotics to decrease the number of people infected with the bacterium. This may include treating, all ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Near Point
In visual perception, the near point is the closest point at which an object can be placed and still form a Focus (optics), focused image on the retina, within the human eye, eye's Accommodation (eye), accommodation range. The other limit to the eye's accommodation range is the far point. A normal eye is considered to have a near point at about for a thirty year old. The near point is highly age dependent (see Accommodation (eye), accommodation). A person with hyperopia or presbyopia would have a near point that is farther than normal. Sometimes, near point is given in diopters (see ), which refers to the inverse of the distance. For example a normal eye would have a near point of \frac = 9\ \text. Vision correction A person with hyperopia has a near point further than comfortable, (i.e. 25 cm) , and hence is unable to bring an object 25 cm away into sharp focus. A corrective lens can be used to correct hyperopia by imaging an object at distance onto a virtual imag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
