Module 18 Vision: Sensory and Perceptual Processing Worksheet

the distance from the peak of one light or sound wave to the peak of the next
the dimension of color that is determined by the wavelength of light
the amount of energy in a light wave, which influences what we perceive as brightness
the adjustable opening in the center of the eye through which light enters
a ring of muscle tissue that forms the colored portion of the eye around the pupil and controls the size of the pupil opening; it dilates or constricts in response to light intensity
the transparent structure behind the pupil that changes shape to help focus images on the retina
a multilayered, light-sensitive tissue on the eyeball’s inner surface; contains the receptor rods and cones plus layers of neurons that begin the processing of visual information
the central focal point in the retina
the process by which the eye’s lens change its curvature and thickness to focus near or far objects on the retina
retinal receptors that detect black, white and gray, and are sensitive to movement; necessary for peripheral and twilight vision when cones don't respond
retinal receptors that are concentrated near the center of the retina and that function in daylight or in well-lit conditions; detect fine details and give rise to color sensations
the nerve that carries neural impulses from the eye to the brain
the point at which the optic nerve leaves the eye, creating a “blind” spot because no receptor cells are located there
nerve cells in the brain’s visual cortex that respond to specific features of the stimulus, such as shape, angle, or movement
processing of many aspects of a problem simultaneously; the brain’s natural mode of information processing for many functions, including vision
the theory that opposing retinal processes (red-green, blue-yellow, white-black) enable color vision. For example, some cells are stimulated by green and inhibited by red; others are stimulated by red and inhibited by green
the theory that the retina contains three different types of color receptors which, when stimulate in combination, can produce the perception of any