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Tritanomaly
Color blindness, color vision deficiency (CVD) or color deficiency is the decreased ability to see color or differences in color. The severity of color blindness ranges from mostly unnoticeable to full absence of color perception. Color blindness is usually a sex-linked inherited problem or variation in the functionality of one or more of the three classes of cone cells in the retina, which mediate color vision. The most common form is caused by a genetic condition called congenital red–green color blindness (including protan and deutan types), which affects ''up to'' 1 in 12 males (8%) and 1 in 200 females (0.5%). The condition is more prevalent in males, because the opsin genes responsible are located on the X chromosome. Rarer genetic conditions causing color blindness include congenital blue–yellow color blindness (tritan type), blue cone monochromacy, and achromatopsia. Color blindness can also result from physical or chemical damage to the eye, the optic nerve, pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ophthalmology
Ophthalmology (, ) is the branch of medicine that deals with the diagnosis, treatment, and surgery of eye diseases and disorders. An ophthalmologist is a physician who undergoes subspecialty training in medical and surgical eye care. Following a medical degree, a doctor specialising in ophthalmology must pursue additional postgraduate residency training specific to that field. In the United States, following graduation from medical school, one must complete a four-year residency in ophthalmology to become an ophthalmologist. Following residency, additional specialty training (or fellowship) may be sought in a particular aspect of eye pathology. Ophthalmologists prescribe medications to treat ailments, such as eye diseases, implement laser therapy, and perform surgery when needed. Ophthalmologists provide both primary and specialty eye care—medical and surgical. Most ophthalmologists participate in academic research on eye diseases at some point in their training and many inc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brain
The brain is an organ (biology), organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals. It consists of nervous tissue and is typically located in the head (cephalization), usually near organs for special senses such as visual perception, vision, hearing, and olfaction. Being the most specialized organ, it is responsible for receiving information from the sensory nervous system, processing that information (thought, cognition, and intelligence) and the coordination of motor control (muscle activity and endocrine system). While invertebrate brains arise from paired segmental ganglia (each of which is only responsible for the respective segmentation (biology), body segment) of the ventral nerve cord, vertebrate brains develop axially from the midline dorsal nerve cord as a brain vesicle, vesicular enlargement at the rostral (anatomical term), rostral end of the neural tube, with centralized control over all body segments. All vertebr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Color Blind Confusion Lines
Color (or colour in Commonwealth English; see spelling differences) is the visual perception based on the electromagnetic spectrum. Though color is not an inherent property of matter, color perception is related to an object's light absorption, emission, reflection and transmission. For most humans, colors are perceived in the visible light spectrum with three types of cone cells (trichromacy). Other animals may have a different number of cone cell types or have eyes sensitive to different wavelengths, such as bees that can distinguish ultraviolet, and thus have a different color sensitivity range. Animal perception of color originates from different light wavelength or spectral sensitivity in cone cell types, which is then processed by the brain. Colors have perceived properties such as hue, colorfulness (saturation), and luminance. Colors can also be additively mixed (commonly used for actual light) or subtractively mixed (commonly used for materials). If the colors ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Armed Forces
A military, also known collectively as armed forces, is a heavily armed, highly organized force primarily intended for warfare. Militaries are typically authorized and maintained by a sovereign state, with their members identifiable by a distinct military uniform. They may consist of one or more military branches such as an army, navy, air force, space force, marines, or coast guard. The main task of a military is usually defined as defence of their state and its interests against external armed threats. In broad usage, the terms "armed forces" and "military" are often synonymous, although in technical usage a distinction is sometimes made in which a country's armed forces may include other paramilitary forces such as armed police. Beyond warfare, the military may be employed in additional sanctioned and non-sanctioned functions within the state, including internal security threats, crowd control, promotion of political agendas, emergency services and reconstr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Firefighter
A firefighter (or fire fighter or fireman) is a first responder trained in specific emergency response such as firefighting, primarily to control and extinguish fires and respond to emergencies such as hazardous material incidents, medical incidents, and emergencies that require response from the public that threaten life, property and the environment, as well as to rescue persons from confinement or dangerous situations and preserve evidence. Firefighters may also provide ordinance regulations, safety requirements, and administrative public functions for the communities and areas they are subject to jurisdiction to. Male firefighters are sometimes referred to as firemen (and, less commonly, female firefighters as firewomen). The fire department, also known in some countries as the fire brigade or fire service, is one of the three main emergency services. From urban areas to aboard ships, firefighters have become ubiquitous around the world. The skills required for safe oper ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Police Officer
A police officer (also called policeman or policewoman, cop, officer or constable) is a Warrant (law), warranted law employee of a police, police force. In most countries, ''police officer'' is a generic term not specifying a particular rank. In some, the use of the rank ''officer'' is legally reserved for military personnel. Police officers are generally charged with the apprehension of Suspect, suspects and the prevention, detection, and reporting of crime, protection and assistance of the general public, and the Public order policing, maintenance of public order. Police officers may be sworn to an Police oath, oath, and have the power to arrest people and Detention (imprisonment), detain them for a limited time, along with other duties and powers. Some officers are trained in special duties, such as counter-terrorism, surveillance, child protection, Very Important Person, VIP Protective security units, protection, Civil law (common law), civil law enforcement, and Criminal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Train Driver
A train driver is a person who operates a train, railcar, or other rail transport vehicle. The driver is in charge of and is responsible for the mechanical operation of the train, train speed, and all of the train handling (also known as brake handling). Train drivers must follow certain guidelines for driving a train safely. Naming British English terms for a train driver include engine driver, engineman, and locomotive driver. The term in North American English is railroad engineer, but the simpler term engineer is more commonly used. Terms for a train driver in other English dialects include locomotive handler, locomotive engineer, locomotive operator, train operator, and motorman. In American English, a hostler (also known as a switcher) moves engines around rail yards, but does not take them out on the main line tracks; the British English equivalent is a shunter. Career progression For many American railroads, the following career progression is typical: assistant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aircraft Pilot
An aircraft pilot or aviator is a person who controls the flight of an aircraft by operating its directional flight controls. Some other aircrew members, such as navigators or flight engineers, are also considered aviators because they are involved in operating the aircraft's navigation and engine systems. Other aircrew members, such as drone operators, flight attendants, mechanics and ground crew, are not classified as aviators. In recognition of the pilots' qualifications and responsibilities, most militaries and many airlines worldwide award aviator badges to their pilots. Definition The first recorded use of the term ''aviator'' (''aviateur'' in French) was in 1887, as a variation of ''aviation'', from the Latin ''avis'' (meaning ''bird''), coined in 1863 by in ''Aviation Ou Navigation Aérienne'' ("Aviation or Air Navigation"). The term ''aviatrix'' (''aviatrice'' in French), now archaic, was formerly used for a female pilot. The term ''aviator'' (''aviateur'' i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mobile App
A mobile application or app is a computer program or software application designed to run on a mobile device such as a smartphone, phone, tablet computer, tablet, or smartwatch, watch. Mobile applications often stand in contrast to desktop applications which are designed to run on desktop computers, and web applications which run in mobile web browsers rather than directly on the mobile device. Apps were originally intended for productivity assistance such as email, calendar, and contact databases, but the public demand for apps caused rapid expansion into other areas such as mobile games, factory automation, GPS and location-based services, order-tracking, and ticket purchases, so that there are now millions of apps available. Many apps require Internet access. Apps are generally downloaded from app stores, which are a type of digital distribution platforms. The term "app", short for "Application software, application", has since become very popular; in 2010, it was listed as " ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Color Task
Color tasks are tasks that involve the recognition of Color, colors. Color tasks can be classified according to how the color is interpreted. Cole describes four categories of color tasks: * Comparative – When multiple colors must be compared, such as with mixing paint * Connotative – When colors are given an implicit meaning, such as red = stop * Denotative – When identifying colors, for example by name, such as “where is the yellow ball?” * Aesthetic – When colors look nice – or convey an emotional response – but don’t carry explicit meaning Earlier classification of color tasks did not attempt to be comprehensive, and mainly differentiated between color matching/ordering, pseudoisochromatic plates and color-naming. In Cole's definitions, the latter would be denotative color tasks and the others would be comparative color tasks. Color blindness Color blindness (or color vision deficiency) is a defect of normal color vision. Because color blindness is a sympt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
EnChroma
EnChroma are a brand of color blind glasses, color corrective lenses designed to address the symptoms of red–green color blindness. Studies have shown that these lenses can alter the appearance of colors, but they do not restore normal color vision, and generally agree that they do not allow the wearer to see "new" colors. However, one study with conflict of interest found an "increase in the maximum response to chromatic contrast". History EnChroma lenses are designed, marketed and distributed by EnChroma, inc. in Berkeley, California. EnChroma glasses were invented incidentally in 2002 by Donald McPherson while trying to develop lenses to protect and aid surgeons during laser operations. The company received a grant from the National Institutes of Health, NIH in 2005, the glasses were released to the public in 2012 and cheaper versions in 2014. In 2015, EnChroma teamed up with Valspar, Valspar Paint in an advertising campaign titled "Color For All", which focused on the exp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Color Blind Glasses
Color blind glasses or color correcting lenses are light filters, usually in the form of glasses or contact lenses, that attempt to alleviate color blindness, by bringing deficient color vision closer to normal color vision or to make certain Color blindness#Color tasks, color tasks easier to accomplish. Despite its Viral video, viral status, the academic literature is generally skeptical of the efficacy of color correcting lenses. Color blindness Color blindness (color vision deficiency) is the decreased ability to see color or differences in color. It can impair daily Color blindness#Color tasks, color tasks such as selecting ripe fruit or choosing clothing, as well as safety-related tasks such as interpreting traffic lights. While the disability of color blindness is considered minor, the use of color in safety systems excludes the color blind from many occupations. Screening for color blindness in these occupations is accomplished with color vision tests, often the Ishihara t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
