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biology
the eye
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Created by
liv dickinson
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Cards (14)
What is the
primary
function of the eye?
To detect light as a
sensory receptor
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How does the
brain
process information from the eye?
It sends electrical impulses along
sensory neurons
to the brain
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What are the main parts of the eye involved in focusing light?
Iris
(controls light entry)
Cornea
(initial light focus)
Lens
(fine-tunes focus)
Retina
(contains
receptor cells
)
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What role do
rods
and
cones
play in the retina?
They detect light and form an image
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What happens to the image in the
retina
?
Nerves
in the retina convert the image into electrical impulses
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What is the pathway of signals from the
retina
to the brain?
Signals are sent along the
optic nerve
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How does the
eye lens
adjust for focusing on objects at different distances?
Distant
objects: lens is less
curved
Near
objects: lens is more curved
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What are common eye problems?
Colour blindness
Cataracts
Long-sightedness
Short-sightedness
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What is
long-sightedness
and how is it corrected?
It is the inability to focus on near objects, corrected with
converging lenses
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What is
short-sightedness
and how is it corrected?
It is the inability to focus on
distant
objects, corrected with
diverging lenses
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What occurs in
cataracts
?
The
lens
becomes cloudy, preventing light from passing through properly
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How are
cataracts
corrected?
By replacing the cloudy lens with a clear
artificial
lens
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What causes
colour blindness
?
It occurs when one of the
color-detecting receptors
(
red
,
green
,
blue
) does not work
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Who is most likely to inherit
colour blindness
?
It is most likely inherited by
males
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