What Do You See

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What Do You See?
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Emmerts Law
Stare at the center of this circle for about 45
seconds and then proceed to the next slide.
Notice the size of the aftereffect. Look at a
piece of white paper close to you and notice the
size of the aftereffect again.
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Write down the phrase.

• ThEcOwgAvecOla.
• TheCowGaveCola

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Read the following phrase from right to
leftonce.

• .rat eht saw tac ehT

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• .rat eht saw tac ehT
• The cat was the tar.

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• Linear Perspective
• Relative Size
• Size Constancy
• Shadows
• Wizard of Oz--
• Spiral
• Sandlot Science
• Specific Visual illusions
• After images

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SENSATION AND PERCEPTION
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Definitions

• Sensation
• a process by which our sensory receptors and
  nervous system receive and represent stimulus
  energy
• Perception
• a process of organizing and interpreting sensory
  information, enabling us to recognize meaningful
  objects and events

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Color blind

•    Color blindness is an inaccurate term for a
  lack of perceptual sensitivity to certain colors.
  Absolute color blindness is almost unknown.
• There are three types of color receptors in our
  eyes, red, green and blue. We also have black and
  white receptors. They are more sensitive than the
  color receptors, that is why we have poor color
  perception in the dark.

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• Color blindness comes as a result of a lack of
  one or more of the types of color receptors. Most
  color perception defects are for red or green or
  both. About 10 of males have a color perception
  defect, but this is rare in females. Red-green
  color blindness is a result of a lack of red
  receptors.
•     Another form of color blindness --
  yellow-blue is the second most common form, but
  it's extremely rare. It is also possible to have
  the color receptors missing entirely, which would
  result in black and white vision.

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 What numbers do you see ?
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• Another color blind test

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