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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. |
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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. |
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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. |
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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. |
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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. |
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