the way the brain makes sense of the visual image detected by the brain
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Retina
the light-sensitive layer at the back of the eye. It is made up f nerve cells called rods and cones
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Rods
light-sensitive cells in the retina that respond even in dim light.
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Cones
light-sensitive cells in the retina that can detect colour.
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Optic nerve
bundle of nerves that leads out from the retina at the back of the eye. It carries information from the rods and cones to the brain
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Blind spot
the area of the retina where the optic nerve leaves. It has no rods or cones and so cannot detect light
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Optic chiasma
the cross-shape where some of the information from the left and right eye crosses over to pass into the opposite side of the brain
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Visual cortex
the area at the back of the brain that interprets visual information
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Difference between vision and perception
vision is the biological process of seeing and perception is the psychological process of making sense of the image
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What the visual cortex does
allows us to understand shapes and distances and fills in the gap left by the blind spot in each eye
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Depth cues
the visual 'clues' that we use to understand depth or distance
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Monocular depth cues (examples)
information about distance that comes rfrom one eye, such as superimposition, relative size, texture gradient, linear perspective and height in the plane
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Binocular depth cues
information about distance that needs two eyes, such as stereopsis
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Size consistency
we percieve an object as the same size even when its distance from us changes
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Relative size
smaller objects are perceived as further away than larger ones
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Texture gradient
an area with a detailed pattern perceived to be nearer than one with less detail
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Height in the plane
objects closer to the horizon are perceived to be more distant than ones below or above the horizon
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Superimposition
a partly hidden object must be further away than the object covering it
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Linear perspective
parallel lines appear to converge (meet) in the distance
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Stereopsis
a binocular depth cue. The greater the difference between the view seen by the left eye and the right eye, the closer the viewer is looking
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Other cards in this set
Card 2
Front
the light-sensitive layer at the back of the eye. It is made up f nerve cells called rods and cones
Back
Retina
Card 3
Front
light-sensitive cells in the retina that respond even in dim light.
Back
Card 4
Front
light-sensitive cells in the retina that can detect colour.
Back
Card 5
Front
bundle of nerves that leads out from the retina at the back of the eye. It carries information from the rods and cones to the brain
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