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An antonym is one of a pair of words with opposite meanings. Each word in the pair is the antithesis of the other. A word may have more than one antonym. There are three categories of antonyms identified by the nature of the relationship between the opposed meanings.
The resulting perception is also known as vision, sight, or eyesight (adjectives visual, optical, and ocular, respectively). The various physiological components involved in vision are referred to collectively as the visual system , and are the focus of much research in linguistics , psychology , cognitive science , neuroscience , and molecular ...
Sight or Sights may also refer to: An object of sightseeing, a point of interest; Sight (device), used to assist aim by guiding the eye Sighting in, adjusting ...
Stereopsis (from Ancient Greek στερεός 'solid' and ὄψις (ópsis) 'appearance, sight') is the component of depth perception retrieved through binocular vision. [1] Stereopsis is not the only contributor to depth perception, but it is a major one.
Far-sightedness; Other names: Hypermetropia, hyperopia, longsightedness, long-sightedness [1]: Far-sightedness without (top) and with lens correction (bottom)
A reticle, or reticule [1] [2] also known as a graticule, is a pattern of fine lines or markings built into the eyepiece of an optical device such as a telescopic sight, spotting scope, theodolite, optical microscope or the screen of an oscilloscope, to provide measurement references during visual inspections.
The term myopia is of Koine Greek origin: μυωπία myōpia ' short-sight ' and μυωπίασις (myōpiasis) ' short-sight-ness '. It is derived from the ancient Greek μύωψ ( myōps ) ' short-sighted ' (man), from μύειν ( myein ) ' to shut the eyes ' and ὤψ ( ōps ) ' eye, look, sight ' ( GEN ὠπός ( ōpos )).
The phenomenon was first described by Francis Galton in 1880 in a statistical study about mental imagery. [2] Galton wrote: To my astonishment, I found that the great majority of the men of science to whom I first applied, protested that mental imagery was unknown to them, and they looked on me as fanciful and fantastic in supposing that the words "mental imagery" really expressed what I ...