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Vision in Biological Definition

Albinism

... the eyes) or stigmatism, though this and general vision often improves towards middle age , when most ... as bright but angled reading lights, but their vision cannot be corrected completely. Although surgery ... limited degree) the improvements in the albino's vision that often come with age, the gain is generally ...

Eye

... complex eyes are used to provide the sense of vision . Contents showTocToggle("show","hide") ... Adaptation Accommodation Binocular vision Crystallin Evil eye Evolution of the ... Optometry Ophthalmology Persistence of vision Saccade Snellen chart Staring contest ...

Vision

... vision can refer to: Visual perception is one of the senses . vision (religion) "Vision" can mean an imagined ... play on this sense of the word. A company vision may express a corporate long-term goal - not ...

Brain

... The reverse path has also been demonstrated; brain implants have been used to generate artificial hearing and (crude and experimental) artificial vision for deaf and blind people, and brain pacemakers are now common to regulate brain activity in conditions such as Parkinson's disease . Both of ...

Diabetes mellitus

... common presenting symptom is altered vision. Prolonged high blood glucose causes changes in the shape of the lens in the eye, leading to blurred vision and, perhaps, a visit to an optometrist . All unexplained quick changes in eyesight should force a fasting blood glucose test. These are now quick ...

Homunculus

... Again this cannot be a full explanation because all that has been done is to place a little person in the brain behind the cortex. In the theory of vision the Homunculus Argument invalidates theories that do not explain 'projection', the experience that the viewing point is separate from the things that ...

Signal transduction

... of Ca 2+ Ca 2+ is used in a multitude of processes, among them muscle contraction, release of neurotransmitter from nerve endings, vision in retina cells, proliferation , secretion , cytoskeleton management, cell motion , gene expression and metabolism . The three main ...

Vestibular system

... (VOR) The vestibular system needs to be fast: if we want clear vision, head movements need to be compensated almost immediately. Otherwise our vision corresponds to a photograph taken with a shaky hand. To achieve clear vision, signals from the semicircular canals are sent as directly as possible ...
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