Psychology 3.2

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Across
  1. 5. a transparent covering on the eye's surface through which light enters
  2. 7. the structure in the eye that focuses light rays on the retina
  3. 11. specialized neurons in the visual cortex that respond only to particular features of visual stimuli, such as horizontal or vertical lines
  4. 12. people who have no color vision and can only see in black and white
  5. 16. a theory of color vision that holds that the experience of color results from opposing processes involving two sets of color receptors, red-green receptors and blue-yellow receptors, and that another set of opposing receptors, black-white, is responsible for detecting differences in brightness
  6. 20. the black opening inside the iris that allows light to enter the eye
  7. 21. the pigmented, circular muscle in the eye that regulates the size of the pupil to adjust to changes in the level of illumination
Down
  1. 1. nerve cells in the back of the eye that transmit neural impulses in response to light stimulation, the axons of which make up the optic nerve
  2. 2. the process by which the lens changes its shape to focus images more clearly on the retina
  3. 3. photoreceptors that are sensitive only to the intensity of light (light and dark)
  4. 4. a layer of interconnecting cells in the eye that connect photoreceptors to ganglion cells
  5. 6. the area in the retina where the optic nerve leaves the eye and that contains no photoreceptor cells
  6. 8. a theory of color vision that posits that the ability to see different colors depends on the relative activity of three types of color receptors in the eye (red, green, and blue-violet)
  7. 9. the light-sensitive layer of the inner surface of the eye that contains photoreceptor cells
  8. 10. people who can see some colors but not others
  9. 13. the nerve that carries neural impulses generated by light stimulation from the eye to the brain
  10. 14. the visual image of a stimulus that remains after the stimulus is removed
  11. 15. the area near the center of the retina that contains only cones and that is the center of focus for clearest vision
  12. 17. light-sensitive cells (rods and cones) in the eye upon which light registers
  13. 18. people with normal color vision who can discern all the colors of the visual spectrum
  14. 19. photoreceptors that are sensitive to color