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BIOPSYCHOLOGY (VISUAL SYSTEM), :pencil2: Light behaves like particles and…
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:pencil2: Light sometimes defines as waves of electromagnetic energy between 1 nanometers - 1 kilometer in length
:pencil2: Human eye can detect electromagnetic radiation called light between the wave - lengths range of about 380 and 780 nanometers
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:pencil2: The wavelength is directly related to the energy of light - shorter wavelength are higher energy and longer wavelength are lower energy
:pencil2: The brightness is the intensity, whereas the color is the wavelength
:pencil2: We can control the light either to make it more or less intense by making it brighter or dimmer
:pencil2: Lights enters the eye through the pupil, the hole in the iris
:pencil2: The adjustment of pupil size in response to changes in illumination represents a compromise between
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:pencil2: High level illumination - the visual system takes advantage of the situation by constricting the pupils
:pencil2: Low level illumination - the pupils dilate to let in more light, sacrificing acuity & depth of focus
:fire:Pupils constricted - the image falling in each retina is sharper & greater depth focus (a greater range of depths is simultaneously kept in focus on the retinas
:pencil2: By having eyes on each side, we can see almost direction without moving our heads
:pencil2: Eye mounted side by side in front of the heads - the ability to see behind so that what is in front can be viewed through both eyes simultaneously
:pencil2: Prey : have side-facing eyes because it give them lager fields of vision & ability to see predators approaching from most direction
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:pencil2: Hues color : blue,green & yellow
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:fire: Class for encoding color - only two basic color pigmentation (red &blue). Red's compliment green and blue compliment yellow
:fire: Class for encoding brightness - signal black & white color, from the right mixture of the basic color
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:fire: Receive input from the area of secondary visual cortex & from the secondary areas of other sensory systems
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:warning: Prospagnosia - a visual agnosia for faces that can be acquired either during development or as a result of brain injury
:explode: Agnosia : a failure of recognition that is not attributable to a sensory deficit or to verbal or intellectual impairment
:warning: Akinetopsia - the deficiency in the ability to see movement progress in a normal smooth fashion
:explode: Often associated with damage to the middle temporal area of the cortex which is located near the junction of the temporal, parietal & occipital lobe