|
Pseudoisochromatic Plates
A color vision test is used for measuring color vision against a standard. These tests are most often used to diagnose color vision deficiencies (''color blindness''), though several of the standards are designed to categorize normal color vision into sub-levels. With the large prevalence of color vision deficiencies (8% of males) and the wide range of professions that restrict hiring the colorblind for safety or aesthetic reasons, clinical color vision standards must be designed to be fast and simple to implement. Color vision standards for academic use trade speed and simplicity for accuracy and precision. Applications Color vision standards are used to evaluate the color vision of a subject. They are most commonly applied to job applicants during pre-job screening. The evaluation may be to select against the color vision deficient for roles where basic color vision is required, or to select for individuals with superior color vision for roles where recognition of subtle color ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Color Vision
Color vision, a feature of visual perception, is an ability to perceive differences between light composed of different wavelengths (i.e., different spectral power distributions) independently of light intensity. Color perception is a part of the larger visual system and is mediated by a complex process between neurons that begins with differential stimulation of different types of photoreceptors by light entering the eye. Those photoreceptors then emit outputs that are propagated through many layers of neurons and then ultimately to the brain. Color vision is found in many animals and is mediated by similar underlying mechanisms with common types of biological molecules and a complex history of evolution in different animal taxa. In primates, color vision may have evolved under selective pressure for a variety of visual tasks including the foraging for nutritious young leaves, ripe fruit, and flowers, as well as detecting predator camouflage and emotional states in other pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Minho
The University of Minho (''Universidade do Minho'') is a public university in Portugal, divided into the following campuses: * Largo do Paço (rectorate), in Braga * Campus of Gualtar, in Braga * Convento dos Congregados, in Braga * Campus of Azurém, in Guimarães History The University of Minho, founded in 1973, is one of the then named "New Universities" that, at that time, deeply changed the landscape of higher education in Portugal. Located in the region of Minho, known for its significant economic activity and by the youth of its population, the University of Minho is playing the role of development agent in the region. With over 19,000 students (42% of which are postgraduate students) and with about 1300 professors and 600 employees, UM is one of the largest Portuguese universities. As of 2013, the University of Minho appears on the ranking of Times Higher Education as one of the 100 best universities of the world under the age of 50, occupying the 76th position. In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
City University London
City, University of London, is a public research university in London, United Kingdom, and a member institution of the federal University of London. It was founded in 1894 as the Northampton Institute, and became a university when The City University was created by royal charter in 1966. The Inns of Court School of Law, which merged with City in 2001, was established in 1852, making it the university's oldest constituent part. City joined the federal University of London on 1 September 2016, becoming part of the eighteen colleges and ten research institutes that then made up that university. City has strong links with the City of London, and the Lord Mayor of London serves as the university's rector. The university has its main campus in Central London in the London Borough of Islington, with additional campuses in Islington, the city, the West End and East End. The annual income of the institution for 2019–20 was £245.0 million, of which £11.1 million was from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cambridge University
, mottoeng = Literal: From here, light and sacred draughts. Non literal: From this place, we gain enlightenment and precious knowledge. , established = , other_name = The Chancellor, Masters and Scholars of the University of Cambridge , type = Public research university , endowment = £7.121 billion (including colleges) , budget = £2.308 billion (excluding colleges) , chancellor = The Lord Sainsbury of Turville , vice_chancellor = Anthony Freeling , students = 24,450 (2020) , undergrad = 12,850 (2020) , postgrad = 11,600 (2020) , city = Cambridge , country = England , campus_type = , sporting_affiliations = The Sporting Blue , colours = Cambridge Blue , website = , logo = University of Cambridge logo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rayleigh Match
An anomaloscope is an instrument and color vision test, often used to quantify and characterize color blindness. They are expensive and require specialized knowledge to operate, but are viewed as the gold standard for color vision standards. As a result, they are normally used for academic studies, rather than job pre-screening. They are also used to validate other color vision standards with regards to classification of color vision defects. Principle An anomaloscope requires a subject to make a color match between a ''mixture color'' and a ''test color''. The test color is a single spectral color, for which the subject can adjust the brightness. The mixture color combines two spectral colors, for which the subject can adjust the proportion, thereby changing the hue. These two colored lights are positioned side-by-side and the subject changes the two parameters until the colors appear to match. The parameter values at match define the type and strength of the color vision defect. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anomaloscope
An anomaloscope is an instrument and color vision test, often used to quantify and characterize color blindness. They are expensive and require specialized knowledge to operate, but are viewed as the gold standard for color vision standards. As a result, they are normally used for academic studies, rather than job pre-screening. They are also used to validate other color vision standards with regards to classification of color vision defects. Principle An anomaloscope requires a subject to make a color match between a ''mixture color'' and a ''test color''. The test color is a single spectral color, for which the subject can adjust the brightness. The mixture color combines two spectral colors, for which the subject can adjust the proportion, thereby changing the hue. These two colored lights are positioned side-by-side and the subject changes the two parameters until the colors appear to match. The parameter values at match define the type and strength of the color vision defect. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rayleigh Match Anomaloscope
Rayleigh may refer to: Science *Rayleigh scattering * Rayleigh–Jeans law *Rayleigh waves *Rayleigh (unit), a unit of photon flux named after the 4th Baron Rayleigh *Rayl, rayl or Rayleigh, two units of specific acoustic impedance and characteristic acoustic impedance, named after the 3rd Baron Rayleigh *Rayleigh criterion in angular resolution *Rayleigh distribution *Rayleigh fading *Rayleigh law on low-field magnetization *Rayleigh length *Rayleigh number, a dimensionless number for a fluid associated with buoyancy driven flow *Rayleigh quotient *Rayleigh–Ritz method *Plateau–Rayleigh instability explains why a falling stream of fluid breaks up into smaller packets *Rayleigh–Taylor instability an instability of an interface between two fluids Title of nobility *Baron Rayleigh **Charlotte Mary Gertrude Strutt, 1st Baroness Rayleigh **John William Strutt, 3rd Baron Rayleigh, physicist, winner of a Nobel Prize in 1904 **Robert John Strutt, 4th Baron Rayleigh, physicist; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ishihara Color Test
The Ishihara test is a color vision test for detection of red-green color deficiencies. It was named after its designer, Shinobu Ishihara, a professor at the University of Tokyo, who first published his tests in 1917.S. Ishihara, Tests for color-blindness (Handaya, Tokyo, Hongo Harukicho, 1917). The test consists of a number of Ishihara plates, which are a type of pseudoisochromatic plate. Each plate depicts a solid circle of colored dots appearing randomized in color and size. Within the pattern are dots which form a number or shape clearly visible to those with normal color vision, and invisible, or difficult to see, to those with a red-green color vision defect. Other plates are intentionally designed to reveal numbers only to those with a red-green color vision deficiency, and be invisible to those with normal red-green color vision. The full test consists of 38 plates, but the existence of a severe deficiency is usually apparent after only a few plates. There are also I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Armed Forces
The United States Armed Forces are the military forces of the United States. The armed forces consists of six service branches: the Army, Marine Corps, Navy, Air Force, Space Force, and Coast Guard. The president of the United States is the commander-in-chief of the armed forces and forms military policy with the Department of Defense (DoD) and Department of Homeland Security (DHS), both federal executive departments, acting as the principal organs by which military policy is carried out. All six armed services are among the eight uniformed services of the United States. From their inception during the American Revolutionary War, the U.S. Armed Forces have played a decisive role in the history of the United States. They helped forge a sense of national unity and identity through victories in the First Barbary War and the Second Barbary War. They played a critical role in the American Civil War, keeping the Confederacy from seceding from the republic and preserving the uni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Farnsworth Lantern Test
The Farnsworth Lantern Test, or FALANT, is a color vision test originally developed specifically to screen sailors for tasks requiring color vision, such as identifying signal lights at night. It screens for red-green deficiencies, but not the much rarer blue color deficiency. History The test was developed by Dr. Dean Farnsworth (Commander, United States Navy) while stationed at the Naval Submarine Research Laboratory in New London, Connecticut during World War II. After its adoption by the United States Navy in 1954 as the standard color vision test for sailors aboard ship, it has additionally been used to screen flying personnel. Test Procedure The test consists of showing a pair of vertically oriented lights consisting of combinations of either red, green or yellow-white. The test subject is asked to identify the two colors (some of which are identical). Nine color pairs are administered during the test, beginning with a red/green combination, to allow the patient to see ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Farnsworth–Munsell 100 Hue Test
The Farnsworth–Munsell 100 Hue Color Vision test is a color vision test often used to test for color blindness. The system was developed by Dean Farnsworth in the 1940s and it tests the ability to isolate and arrange minute differences in various color targets with constant value and chroma that cover all the visual hues described by the Munsell color system. There are several variations of the test, one featuring 100 color hues and one featuring 15 color hues. Originally taken in an analog environment with physical hue tiles, the test is now taken from computer consoles. An accurate quantification of color vision accuracy is particularly important to designers, photographers and colorists, who all rely on accurate color vision to produce quality content. Vision tests 100 hue test The most common form of the Farnsworth–Munsell 100 Hue Color Vision Test contains four distinct rows of similar color hues, each containing 25 distinct variations of each hue. Each color hue at th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
