Vision and Stuff

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Vision and Stuff
2013-10-06 21:58:59

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  1. Traduction
    • conversion of one form of energy into another
    • in sensation, the transforming of stimulus energies such as sights, sounds, and smells, into neural impulses our brain can interpret
  2. Wavelength
    • 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
  3. Hue
    • the dimension of color that is determined by the wavelength of light
    • what we know as the color names blue, green, and so forth
  4. Intensity
    the amount of energy in a light or sound wave, which we perceive as brightness or loudness, as determined by the wave's amplitude
  5. Pupil
    the adjustable opening in the center of the eye through which light enters
  6. Iris
    a ring of muscle tissue that forms the colored portion of the eye around the pupil and controls the size of the pupil opening
  7. Lens
    the transparent structure behind the pupil that changes shape to help focus images on the retina
  8. 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
  9. Accomodation
    the process by which the eye's lens changes shape to focus near or far objects on the retina
  10. Rods
    • retinal receptors that detect BLACK, WHITE, and GRAY
    • necessary for peripheral and twilight vision, when cones don't respond
  11. Cones
    • retina receptor cells that are concentrated near the center of the retina that function in daylight or in well-lit conditions
    • the cones detect fine detail and give rise to color sensations
  12. Optic Nerve
    the nerve that carries neural impulses from the eye to the brain
  13. Blind Spot
    the point at which the optic nerve leaves the eye, creating a "blind" spot because no receptor cells are located there
  14. Fovea
    the central focal point in the retina, around which the eye's cones cluster
  15. Feature Detectors
    nerve cells in the brain that respond to specific features of the stimulus, such as shape, angle, or movement
  16. Parallel Processing
    • the processing of many aspects of a problem simultaneously
    • the brain's natural mode of information processing for many functions
    • contrasts with the step-by-step (serial) processing of most computers and of conscious problem solving