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Sensory Process of Vision: Energy Transduction, Anatomical Structures, and Specialized Pathways

Explore the sensory process of vision, including energy transduction, anatomical structures, and specialized pathways in the brain. Learn about the trichromatic theory of color vision, opponent process theory, and color blindness. Discover your blind spot and try the after-image effect.

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Sensory Process of Vision: Energy Transduction, Anatomical Structures, and Specialized Pathways

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  1. CHS AP Psychology Unit 4: Sensation and Perception • Essential Task 4-2:Describe the sensory process of vision including the specific nature of energy transduction (rods and cones and the trichromatic theory of color vision), relevant anatomical structures (cornea, pupil, iris, lens, retina, optic nerve, blind spot and fovea) and specialized pathways in the brain (opponent process theory of color vision and the occipital lobe).

  2. Path light travels through the eye.

  3. Find your blind spot • Get a textbook • Turn to page 239 • Complete exercise 6.9 Where there are no optic nerve cells

  4. Fovea The green and red cones are concentrated in the fovea centralis. The ‘blue’ cones  are mostly found outside the fovea centralis. Central fovea (Fovea Centralis) is responsible for visual acuity and color sensitivty.

  5. Transduction occurs in the Retina

  6. Rods and Cones

  7. Trichromatic Color Theory • We see color due to the RED GREEN BLUE Cones in the retina

  8. Color Blindness Dichromatic problems with reds and greens Dichromatic problems with blues and greens

  9. Color Blindness Tests

  10. OpponentProcessTheory • Further up in the optic nerve, neurons work in pairs to help process color vision signals. • Red-Green = Xmas • Blue-Yellow = Beach Ball • Black-White = Oreo

  11. OpponentProcesstheory helps us explain the after-image effect Your textbook has an example on page 244, but with the Union Jack, which is the British flag. Try it!

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