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How does the eye transform particles of light energy into colorful sights that the mind registers into vision?
<ul><li>Conversion of one form of energy into another.  </li></ul><ul><li>Sensory transduction: the process by which our s...
<ul><li>Transduce (transform) light energy into neural messages that the brain then processes into what you consciously se...
 
 
 
<ul><li>Pupil:  The adjustable opening in the center of the eye through which light enters. </li></ul><ul><li>Iris:  a rin...
<ul><li>Lens:  the transparent structure behind the pupil that changes shape to help focus images on the retina. </li></ul...
<ul><li>Cones :  retinal receptor cells that are concentrated near the center of the retina and that function in daylight ...
<ul><li>Rods   are responsible for vision at low light levels. They do not mediate color vision. </li></ul><ul><li>Retinal...
<ul><li>Fovea:  The ventral focal point in the retina, around which the eye’s cones cluster </li></ul><ul><li>Optic nerve:...
 
 
 
<ul><li>Dark Adaptation :  The recovery of the eye’s sensitivity to visual stimuli in darkness after exposure to bright li...
 
<ul><li>http://www.tangle.com/view_video.php?viewkey=09652b3ef45514be1e9a&sp=1 </li></ul><ul><li>“ The Miracle of Eyesight...
<ul><li>The sharpness of vision, which can be affected by small distortions in the eye’s shape. </li></ul><ul><ul><li>Near...
 
 
 
<ul><li>Nerve cells in the brain that respond to specific features of the stimulus, such as shape, angle, or movement. </l...
 
<ul><li>The processing of several aspects of a problem simultaneously; the brain’s natural mode of information processing ...
 
<ul><li>Requires about 30 percent of the cerebral cortex. </li></ul><ul><ul><li>Brain takes in visual content through the ...
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Vision chapter 3-2

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Vision chapter 3-2

  1. 1. How does the eye transform particles of light energy into colorful sights that the mind registers into vision?
  2. 2. <ul><li>Conversion of one form of energy into another. </li></ul><ul><li>Sensory transduction: the process by which our sensory systems encode stimulus energy as neural messages. </li></ul>
  3. 3. <ul><li>Transduce (transform) light energy into neural messages that the brain then processes into what you consciously see. </li></ul>
  4. 7. <ul><li>Pupil: The adjustable opening in the center of the eye through which light enters. </li></ul><ul><li>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. </li></ul>
  5. 8. <ul><li>Lens: the transparent structure behind the pupil that changes shape to help focus images on the retina. </li></ul><ul><li>Retina: the light-sensitive inner surface of the eye, contain the receptor rods and cones plus layers of neurons that begin the processing visual information. </li></ul>
  6. 9. <ul><li>Cones : retinal receptor cells that are concentrated near the center of the retina and that function in daylight or in well-lit conditions. Detect fine detail and color. </li></ul><ul><li>Scientists still debate exactly how we see color! </li></ul><ul><li>Cones will be sensitive to one of three colors: red, green or blue. </li></ul>
  7. 10. <ul><li>Rods are responsible for vision at low light levels. They do not mediate color vision. </li></ul><ul><li>Retinal receptors that detect black, white, and gray; necessary for peripheral and twilight vision, when cones don’t respond. </li></ul>
  8. 11. <ul><li>Fovea: The ventral focal point in the retina, around which the eye’s cones cluster </li></ul><ul><li>Optic nerve: The nerve that carries neural impulses from the eye to the brain. </li></ul><ul><li>Blind spot: the point at which the optic nerves leaves the eye, creating a “blind” spot because no receptor ells are located there. </li></ul>
  9. 15. <ul><li>Dark Adaptation : The recovery of the eye’s sensitivity to visual stimuli in darkness after exposure to bright lights . (example: night blindness) </li></ul><ul><li>Light Adaptation : The </li></ul><ul><li>recovery of the eye’s </li></ul><ul><li>sensitivity to visual </li></ul><ul><li>stimuli in light after </li></ul><ul><li>exposure to darkness. </li></ul>
  10. 17. <ul><li>http://www.tangle.com/view_video.php?viewkey=09652b3ef45514be1e9a&sp=1 </li></ul><ul><li>“ The Miracle of Eyesight” </li></ul>
  11. 18. <ul><li>The sharpness of vision, which can be affected by small distortions in the eye’s shape. </li></ul><ul><ul><li>Nearsightedness: nearby objects are seen more clearly. </li></ul></ul><ul><ul><li>Farsightedness: faraway objects are seen more clearly than near objects. </li></ul></ul>
  12. 22. <ul><li>Nerve cells in the brain that respond to specific features of the stimulus, such as shape, angle, or movement. </li></ul>
  13. 24. <ul><li>The processing of several aspects of a problem simultaneously; the brain’s natural mode of information processing for many functions, including vision. </li></ul><ul><li>Contrasts with the step-by-step (serial) processing of most computers and of conscious problem solving. </li></ul>
  14. 26. <ul><li>Requires about 30 percent of the cerebral cortex. </li></ul><ul><ul><li>Brain takes in visual content through the eyes back to the visual cortex and adjacent areas. </li></ul></ul><ul><ul><li>Compares it to stored memories. </li></ul></ul><ul><ul><li>Connects what is seen with memory, enabling recognition! </li></ul></ul>

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