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Terms in this set (17)
The thin, light-sensitive layer at the back of the eyeball. The ____ contains millions of photoreceptors and other nerve cells.
Operate like tiny pixel receptors in a camera. Light sensitive cells (neurons) in the retinas that convert light energy to neural impulses. The _____ are as far as light gets into the visual system
Photo receptors in the retina that are especially sensitive to dim light but not the colors.
Photo receptors in the retinas that are specially sensitive to colors but not to dim shapes.
The tiny area of sharpest vision in the retina
The bundle of neurons that carries visual information from the retina to the brain. Transports visual info from eye to brain
Collecting impulses from many photoreceptors. Shuttle them to the ganglion cells
Make up optic nerve
Small area of retina in each eye where everyone is ___. The point where the optic nerve exits The eye and where there are no Photo receptors. Any stimulus that falls on this area cannot be seen
A psychological sensation caused by the intensity of light waves
This is not a property of things in the external world, rather, it is a psychological sensation created in the brain by information obtained by the eyes from the wavelengths of visible light
The entire range of electromagnetic energy, including radio waves, x-rays, microwaves, invisible light. The light we see is a tiny segment of this
The tiny part of the electromagnetic spectrum to which our eyes are sensitive. The _____ of other creatures maybe slightly different from our own
The idea that colors are sensed by three different types of cones sensitive to light in the red, blue, and green wave links. The trichromatic theory explains the earliest stage of color sensation
Explains what happens to bipolar cells and beyond. The idea that cells in the visual system process colors in complementary pairs, such as red or green or as yellow or blue.
Sensations that linger after the stimulus is removed. Most visual ____ or negative after images, which appear in reversed colors
Typically a genetic disorder (although sometimes the result of trauma, as in the case of Jonathan) that prevents an individual from discriminating certain colors. The most common form is red-green
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