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of or pertaining to the eye's pupil: Greek κόρη (kórē), girl, doll; pupil of the eye corectomy: cord(i)-of or pertaining to the heart (uncommon as a prefix) Latin cor, heart commotio cordis, cornu-applied to describing processes and parts of the body as likened or similar to horns Latin cornū, horn greater cornu: coron-pertaining to the ...
Internet censorship in the United States is the suppression of information published or viewed on the Internet in the United States. The First Amendment of the United States Constitution protects freedom of speech and expression against federal, state, and local government censorship. Free speech protections allow little government-mandated ...
Parallax is an angle subtended by a line on a point. In the upper diagram, the Earth in its orbit sweeps the parallax angle subtended on the Sun. The lower diagram shows an equal angle swept by the Sun in a geostatic model. A similar diagram can be drawn for a star except that the angle of parallax would be minuscule.
Wikipedia is a free online encyclopedia that anyone can edit and contribute to. It contains millions of articles in hundreds of languages, covering various topics and domains. Learn more about the list of most-visited websites on Wikipedia, and discover how popular and influential they are in the world.
Frequency. 60 million (2015) [ 6 ] A cataract is a cloudy area in the lens of the eye that leads to a decrease in vision of the eye. [ 1 ][ 7 ] Cataracts often develop slowly and can affect one or both eyes. [ 1 ] Symptoms may include faded colours, blurry or double vision, halos around light, trouble with bright lights, and difficulty seeing ...
Censorship is the suppression of speech, public communication, or other information. This may be done on the basis that such material is considered objectionable, harmful, sensitive, or "inconvenient". [ 2 ][ 3 ][ 4 ] Censorship can be conducted by governments, [ 5 ] private institutions. [ 6 ]
The Quran is known to contain a number of words the meaning of which is not clear and for which Muslim commentators (and Western scholars) have created "a welter of competing guesses". [119] qaḍb possible meaning "green herbs" of some kind. [120] ʿābb , possible meaning "pasture" [120]
Eye examination for visual acuity. Visual acuity is a measure of the spatial resolution of the visual processing system. VA, as it is sometimes referred to by optical professionals, is tested by requiring the person whose vision is being tested to identify so-called optotypes – stylized letters, Landolt rings, pediatric symbols, symbols for the illiterate, standardized Cyrillic letters in ...