Find the cornea on the picture below. The
cornea is a transparent or see-through covering on the outside of the
eye. Light passes through the cornea, and then through the pupil, an
opening in the eye. Find the lens that sits behind the pupil.
The lens puts the light in focus. The lens in your eye acts just
like the lens in a camera. The lens of your eye focuses a picture on
a special surface at the back of the eye. The image however is
upside-down. This special surface at the back of the eye is called
the retina. Find the retina on the picture below.
The retina sends images to the optic nerve, which then
sends them to the brain. This is where the image is flipped right
side up. This happens very quickly; so quickly you don't even notice
The pupil of the eye gets bigger and smaller
automatically. The size of the pupil adjusts so the eye will not be
injured. If the light is too dim, the pupil opens up to let more
light hit the retina. If the light is too bright, the pupil closes
to let less light in.
The part of the eye that adjusts the size of the pupil
is called the iris. The iris is the part of your eye that is colored
brown, blue, or green.
People who wear glasses do so because their eyes don't
work properly. Some people are nearsighted. This means that
they can see things close up, but have trouble seeing things far
away. People who are farsighted can see things far away, but have
trouble seeing things that are nearby.
It is important to have your eyes and vision checked by
a doctor. If a problem is found, you may need glasses. The
lenses of glasses are shaped to help your eyes work properly.
Directions: Answer the questions below about the
eye and how it works.
The transparent or see-through covering on the outside
of the eye is called the
The opening in the eye is called the
It can get bigger or smaller.
What sits directly behind the pupil of the eye?
The surface at the back of the eye is called the
How does the image at the back of the eye appear?
The optic nerve sends messages to the
The colored part of the eye that adjusts the size of the
pupil is called the
If you can see things close up, but have trouble seeing
things far away you are
If you can see things far away, but have trouble seeing
things close up, you are
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