The Eye

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The Eye
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• Our eyelid is like a windshield on a car, it
  cleans your eyeball when you blink.
• When it is dark the eye opens wider to let more
  light in. When it is light the eye protects
  itself by only letting a little light in.
• Eye lets you see millions of colors.
• Eye lets you see close and far.

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The eye

• Light enters the eye through the transparent
  cornea, passes through the aqueous humor, the
  lens and the vitreous humor, where it forms the
  image on the retina.

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The Eye
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Rods and Cones

• The retina contains two types of cells, called
  rods and cones. Rods handle vision in low light,
  and cones handle color vision and detail.

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Website showing Rods and Cones http//health.hows
tuffworks.com/eye2.htm
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Blind Spot

• Blind Spot - is the area where the optic nerve
  and retinal blood vessels enter the eye.  It is
  blind because there are no rods and cones to make
  vision possible.

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The Eye
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Why Do We Have 2 Eyes?

• The brain takes the picture seen by each eye
  and combines them to make one picture.

• Sometimes our brain is tricked
• into seeing things that arent real.
• These are called optical illusions.

• Lets try some!

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This Is a Bunny/duck Illusion. Do You See the
Bunny and the Duck?
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What do you see at first an old lady or a young
woman?
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Do You See a Vase, or Something More?
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How Many Prongs Are on This Fork?
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Find the Secret MessageHint Look at the White.
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There Is Not a Triangle Here.
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Is This Man Playing a Sax, or Is There Something
More Going on Here?
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What Does This Say?Now Read It Again!
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A Man With Ivy Leaves Around Him, but Do You See
a Couple Kissing?
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• The nose is actually the girls face
• The eyes of the old man are the hair for the boy
  and girl
• The beard is the dress for the girl on the right
  and the clothes for
• The boy on the left.