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21 Cards in this Set
- Front
- Back
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Top-Down Processing
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Information processing guided by higher-level mental processes as we construct perceptions, drawing on our experience and expectations
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Lens
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Transparent structure behind the pupil that changes shape to focus images on the retina.
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Accommodation
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The process by which the eye’s lens changes shape to help focus near or far objects on the retina
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Retina
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The light-sensitive inner surface of the eye, containing receptor rods and cones in addition to cells that process visual information
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Bipolar cells
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receive messages from photoreceptors and transmit them to ganglion cells, which converge to form the optic nerve.
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Optic nerve
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Carries neural impulses from the eye to the brain.
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Blind Spot
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Point where the optic nerve leaves the eye because there are no receptor cells located there.
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Fovea
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Central point in the retina around which the eye’s cones cluster.
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6 million
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How many cones in the human eye?
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120 million
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How many rodsin the human eye?
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Center
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Location of cones in retaina
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Periphery
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Location of rodsin retaina
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Sensation
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physical energy (a stimulus) from the environment is detected
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Transduction
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the physical energy is converted into neural signals
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Perception
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organization and interpretation of sensations
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Psychophysics
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A study of the relationship between physical characteristics of stimuli and our psychological experience with them.
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Opponent-Process Theory-
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opposing retinal processes enable color vision
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Color Blindness
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Genetic disorder in which people are blind to green or red colors. This supports the Trichromatic theory.
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Optic nerves
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connect to the thalamus in the middle of the brain
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thalamus
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connects to the visual cortex.
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Intensity
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Amount of energy in a wave determined by the amplitude.
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