Flashcards in 4.2 Deck (26):
What strikes our eyes is not color....
But pulses of electromagnetic energy that our visual system perceives as color
The distance from the peak of one light or sound wave to the peak of the next. Electromagnetic wavelengths vary from the short blips of cosmic rays to the long pulses of radio transmission
The dimension of color that is determined by the wavelength of light; what we know as the color names, blue, green, and so forth
The amount of energy in a light or sound wave, which we perceive as brightness or loudness, as determined by the wave's amplitude
Protects the eye and bends light to provide focus
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
The transparent structure behind the pupil that changes shape to help focus images on the retina
The light-sensitive inner surface of the eye, containing the receptor rods and cones plus layers of neurons that begin the processing of visual information
The process by which the eye's lens change shape to focus near or far objects on the retina
The retina doesn't....
"See" a whole image
Retinal receptors that vets the black, white, and gray; necessary for peripheral and twilight vision, when comes don't respond
Retinal receptor cells that are concentrated near the center of the retina and that function in daylight or in well-lit conditions. The cones detect fine detail 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" apt because no receptor cells are located there
The central vocal pony in the retina, around which the eye cones cluster
Bipolar cells help....
Relay the cone's individual message to the visual cortex
Cones enable you to...
Black and which vision
You eye responds to pressure as....
Nerve cells in the brain that respond to specific features of the stimulus, such as shape, angle, or movement
The processing of many aspects of a problem simultaneously; the brain's natural mode of information processing for many functions, including vision. Contrasts with the step by step processing of most computers and conscious problem solving
A localized area of blindness in their field of vision
Young-helmholtz trichromatic (three-color) theory
The theory that the retina contains three different color receptors- one most sensitive to red, one to green, one to blue-which, when stimulated on combination, can produce the perfection of any color
The theory that opposing retinal processes (red-green, yellow- blue, white-black) enable color vision. For example some cells are stimulated by green and inhibited by red and vice versa