Vision - on near objects; requires bifocals Vision: Normal...

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Vision 1. Light 1. Wave characteristics 2. The Eye 1. Structure of the eye 2. Problems with vision 3. Colour 1. Rods and cones 2. Colour blindness Light Physical Characteristics ± transduction : conversion of external stimulus energy into internal neural energy that can be sensed ± wavelength : distance from peak to peak of the wave; determines hue (colour) ± intensity : distance from top to bottom, or amplitude (height); determines brightness
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The Eye Common Problems with Vision ± short-sightedness ( myopia ) = image focused in front of retina; eye is too long ± far-sightedness ( hypermetropia ) = image focused behind retina; eye is too short ± aging eyes ( presbyopia ) = the lens stiffens with age and won’t curve; harder to focus
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Unformatted text preview: on near objects; requires bifocals Vision: Normal & Abnormal Transduction & Transmission Finding Your Blind Spot + . 2 inches- hold 6-10 inches away, close your right eye, and look at the dot- the blind spot is where the optic nerve exits the back of the eye Retinal Receptors ± rods : retinal receptors that detect shading of black, white & grey; more in the periphery; important at night ± cones : retinal receptors that detect colours; concentrated in the fovea (centre); important in the day time and for fine detail Protanopia Normal Protanope Deuteranopia Normal Deuteranope Deuteranopia Normal Deuteranope Tritanopia Normal Tritanope...
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This note was uploaded on 04/02/2010 for the course PSYCH PSYCH 101 taught by Professor D during the Fall '09 term at Waterloo.

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Vision - on near objects; requires bifocals Vision: Normal...

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