B1 - Receptors (The Eye)

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  • Created by: Rachelcfx
  • Created on: 29-04-16 16:45
What does the cornea do?
Refracts (bends) light into the eye.
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What does the iris do?
Controls how much light enters the pupil.
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What does the lens do?
Refracts light, focusing it to the retina.
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What does the retina do?
LIGHT SENSITIVE part that is covered in RODS AND CONES which DETECT LIGHT.
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Rods...
Sensitive in dim light, can't sense colour.
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Cones...
Sensitive to colours, not good in dim light.
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What is red, green colour blindness due to?
A lack of CONE CELLS.
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What is the optic nerve?
Carries impulses from receptors to brain.
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How does the eye focus light?
By changing the shape of the lens (accommodation)
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To look at distant objects...
Ciliary muscle relaxes.
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To look a close objects...
Ciliary muscle contracts.
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Other cards in this set

Card 2

Front

What does the iris do?

Back

Controls how much light enters the pupil.

Card 3

Front

What does the lens do?

Back

Preview of the front of card 3

Card 4

Front

What does the retina do?

Back

Preview of the front of card 4

Card 5

Front

Rods...

Back

Preview of the front of card 5
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