Describing Colour
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H10: Description of Colour> Colour is a term used for a particular part of the description of the appearance of an object. Colour is not a property of light, colour is a sensation perceived by the brain in a similar way to sound, touch, smell and taste.
Eye Structure
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H11: Vision: Structure of the Eye> Sight can be considered as the most important of the senses, since it has been estimated that four-fifths of the information our senses gather about the world is through our eyes.
Colour Vision
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H12: Vision Properties and Effects> At medium and high levels of illumination the three types of cones cells are sensitive to light and the rod cells are insensitive to light.
Impaired Colour Vision
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H13: Impaired Colour Vision> The first detailed account of impaired colour vision was by the chemist John Dalton and his brother in 1798; as a result it is often called Daltonism. Impaired colour vision can be hereditary or acquired as a symptom of disease or an injury to the head.
Colour Vision Theory
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H14: Theories of Colour Vision> The presence of three types of "colour" receptors in the retinal layer confirmed the ideas that had been proposed in the trichromatic theory of human colour vision.