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The term computer system may refer to a nominally complete computer that includes the hardware, operating system, software, and peripheral equipment needed and used for full operation; or to a group of computers that are linked and function together, such as a computer network or computer cluster .
Edinburgh is the capital city of Scotland and one of its 32 council areas. Located in the south-east of Scotland, it is bounded to the north by the Firth of Forth estuary and to the south by the Pentland Hills. With a population of 506,520 in mid-2020, Edinburgh is the second-largest city in Scotland by population and the seventh-largest in the ...
International Business Machines Corporation (using the trademark IBM), nicknamed Big Blue,[6] is an American multinational technology company headquartered in Armonk, New York and present in over 175 countries.[7][8] IBM is the largest industrial research organization in the world, with 19 research facilities across a dozen countries, having ...
- Genetic Determination
- Changes in Eye Color
- Eye Color Range
- Medical Implications
- Limbal Ring
- Impact on Vision
- Classification of Color
- See Also
- External Links
Eye color is an inherited trait determined by multiple genes. These genes are sought by studying small changes in the genes themselves and in neighboring genes, called single-nucleotide polymorphisms or SNPs. The total number of genes that contribute to eye color is unknown, but there are a few likely candidates. A study in Rotterdam(2009) found th...
Most newborn babies who have European ancestry have light-colored eyes. As the child develops, melanocytes (cells found within the iris of human eyes, as well as skin and hair follicles) slowly begin to produce melanin. Because melanocyte cells continually produce pigment, in theory eye color can be changed. Adult eye color is usually established b...
Brown
Almost all mammals have brown or darkly-pigmented irises. In humans, brown is by far the most common eye color, with approximately 79% of people in the world having it.Brown eyes result from a relatively high concentration of melanin in the stroma of the iris, which causes light of both shorter and longer wavelengths to be absorbed. Dark brown eyes are dominant in humans. In many parts of the world, it is nearly the only iris color present. Brown eyes are common in Europe, East Asia, Southeas...
Amber
Amber eyes are a solid color with a strong yellowish/golden and russet/coppery tint, which may be due to the yellow pigment called lipochrome (also found in green eyes).Amber eyes should not be confused with hazel eyes. Although hazel eyes may contain specks of amber or gold, they usually tend to have many other colors, including green, brown and orange. Also, hazel eyes may appear to shift in color and consist of flecks and ripples, while amber eyes are of a solid gold hue. Even though amber...
Hazel
Hazel eyes are due to a combination of Rayleigh scattering and a moderate amount of melanin in the iris' anterior border layer. Hazel eyes often appear to shift in color from a brown to a green. Although hazel mostly consists of brown and green, the dominant color in the eye can either be brown/gold or green. This is why hazel eyes can be mistaken as amber and vice versa.The combination can sometimes produce a multicolored iris, i.e., an eye that is light brown/amber near the pupil and charco...
The most important role of melanin in the iris is to protect the eyes from the sun's harmful rays. People with lighter eye colors, such as blue or green, have lessened protection from the sun, and so need greater protection from the sun's rays than those with darker eye colors.[citation needed] Those with lighter iris color have been found to have ...
The limbal ring is also a feature of the iris contributing to eye color, appearing as a darkened, occasionally black region encircling the iris resulting from a manifestation of the optical properties of the corneal limbus. Limbal rings are not present in all individuals, and their thickness and prominence may correlate with health or youthfulness,...
Although people with lighter eye color are generally more sensitive to light because they have less pigment in the iris to protect them from sunlight, there is little to no evidence that eye color has a direct impact on vision qualities such as visual acuity. However, there is a study that found that dark-eyed people perform better at "reactive-typ...
Iris color can provide a large amount of information about a person, and a classification of colors may be useful in documenting pathological changes or determining how a person may respond to ocular pharmaceuticals. Classification systems have ranged from a basic light or dark description to detailed gradings employing photographic standards for c...
The Galápagos Islands ( Spanish: Islas Galápagos) are an archipelago of volcanic islands in the Eastern Pacific, located around the Equator 900 km (560 mi) west of South America. They form the Galápagos Province of the Republic of Ecuador, with a population of slightly over 33,000 (2020).
Highest-grossing films Three of the four highest-grossing films, including Avatar at the top, were written and directed by James Cameron. With a worldwide box-office gross of over $2.9 billion, Avatar is proclaimed to be the "highest-grossing" film, but such claims usually refer to theatrical revenues only and do not take into account home video and television income, which can form a ...
The question mark ? (also known as interrogation point, query, or eroteme in journalism [1]) is a punctuation mark that indicates a question or interrogative clause or phrase in many languages . History.
