B1 - Receptors: The Eye

Learn what each part of the eye does, and how to correct long/short sightedness, among other facts you need to know for your biology exam.

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The job of the cornea is...
...to refract light into the eye.
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The job of the iris is...
...to control how much light enters the eye.
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The job of the lens is...
...to refract light and focus it onto the retina.
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The job of the retina is...
...to detect the light using rods and cones that are on its surface.
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The job of rods is...
...to sense light, not colour.
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The job of cones is...
...to sense colour, not light.
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The job of the optic nerve is...
...to send impulses from the eye to the brain.
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The job of the ciliary muscle is...
...to relax/contract to control the suspensory ligaments.
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The job of the suspensory ligaments is...
...to tighten/slacken to control the shape of the lens.
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The pupil is...
...the hole in the middle that allows light to travel into the eye.
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Accomodation is...
...the shape change of the lens to focus light.
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When the lens is thin...
...light is refracted less.
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When the lens is round...
...light is refracted more.
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Long-sighted people are unable to focus on...
...near objects.
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Short-sighted people are unable to focus on...
...distant objects.
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Long-sightedness occurs when the eyeball is...
...too short.
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Short-sightedness occurs when the eyeball is...
...too long.
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A concave lens can be used to correct...
...short-sightedness.
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A convex lens can be used to correct...
...long-sightedness.
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An alternative to glasses or contact lenses is...
...corneal laser surgery.
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Binocular vision is when...
...the eyes are at the front of the head, and work together to form an image.
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Other cards in this set

Card 2

Front

The job of the iris is...

Back

...to control how much light enters the eye.

Card 3

Front

The job of the lens is...

Back

Preview of the front of card 3

Card 4

Front

The job of the retina is...

Back

Preview of the front of card 4

Card 5

Front

The job of rods is...

Back

Preview of the front of card 5
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