Pelopsia
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Pelopsia
Pelopsia is a vision perception disorder in which objects appear nearer than they actually are. Pelopsia can be caused by psychoneurotic phenomena, changes in atmospheric clarity, or sometimes by wearing a corrective lens. See also *Teleopsia Teleopsia is a vision perception disorder, in which objects appear much farther away than they are. Teleopsia is a disorder associated with dysmetropsia. See also * Pelopsia References Eye diseases {{eye-stub ... * Vision deficiencies and disorders References Eye diseases {{eye-stub ...
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Psychoneurotic
Neurosis is a class of functional mental disorders involving chronic distress, but neither delusions nor hallucinations. The term is no longer used by the professional psychiatric community in the United States, having been eliminated from the '' Diagnostic and Statistical Manual of Mental Disorders'' (DSM) in 1980 with the publication of DSM III. However, it is still used in the ICD-10 Chapter V F40–48. Neurosis should not be mistaken for ''psychosis'', which refers to a loss of touch with reality. Nor should it be mistaken for '' neuroticism'', a fundamental personality trait proposed in the Big Five personality traits theory. Etymology The term is derived from the Greek word ''neuron'' (νεῦρον, 'nerve') and the suffix ''-osis'' (-ωσις, 'diseased' or 'abnormal condition'). The term ''neurosis'' was coined by Scottish doctor William Cullen in 1769 to refer to "disorders of sense and motion" caused by a "general affection of the nervous system." Cullen used t ...
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Corrective Lens
A corrective lens is a lens (i.e. a transmissive optical device) that is typically worn in front of the eye to improve daily vision. The most common use is to treat refractive errors: myopia, hypermetropia, astigmatism, and presbyopia. Glasses or "spectacles" are worn on the face a short distance in front of the eye. Contact lenses are worn directly on the surface of the eye. Intraocular lenses are surgically implanted most commonly after cataract removal but can be used for purely refractive purposes. Prescription of corrective lenses Corrective lenses are typically prescribed by an ophthalmologist or an optometrist. The prescription consists of all the specifications necessary to make the lens. Prescriptions typically include the power specifications of each lens (for each eye). Strengths are generally prescribed in quarter-diopter steps (0.25 D) because most people cannot generally distinguish between smaller increments (e.g., eighth-diopter steps / 0.125 D). The use ...
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Teleopsia
Teleopsia is a vision perception disorder, in which objects appear much farther away than they are. Teleopsia is a disorder associated with dysmetropsia. See also *Pelopsia Pelopsia is a vision perception disorder in which objects appear nearer than they actually are. Pelopsia can be caused by psychoneurotic phenomena, changes in atmospheric clarity, or sometimes by wearing a corrective lens. See also *Teleopsia Tele ... References Eye diseases {{eye-stub ...
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Visual Perception
Visual perception is the ability to interpret the surrounding environment through photopic vision (daytime vision), color vision, scotopic vision (night vision), and mesopic vision (twilight vision), using light in the visible spectrum reflected by objects in the environment. This is different from visual acuity, which refers to how clearly a person sees (for example "20/20 vision"). A person can have problems with visual perceptual processing even if they have 20/20 vision. 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 biology, collectively referred to as vision science. Visual system In humans and a number of other mammals, light enters the eye through the cornea and is ...
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