1. The Eye Quiz
Designed by Esme Mirzoeff
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2. Welcome to the eye quiz!
You will be asked different questions,
try as hard as you can to get them right.
Your brain MUST be switched on!
Click here to
switch on your
brain.

3. Your brain is now
switched on!
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4. A
Question 1
What is the white
part in your eye
called?
B
C Iris
Retina
Sclera
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C
A
B

5. WELL DONE!
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The sclera is the
white outer coating
of the eye
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6. The sclera
The sclera is
the
protective
coat of the
eye
It is thinner in
children and
thicker in
adults
There are six
muscles around
the sclera. They
are connected
to it and control
the movement
of the eye
The optic
nerve is joined
to the sclera
at the back of
the eye.
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7. Oops, try again.
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8. Question 2
Why do you blink?
C
B
A To save energy
To keep your eyes moist
So your brain has time to process images
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C
B
A

9. WELL DONE!
You blink
to keep
your eyes
moist
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More info

10. Blinking
3
1
2
4
You normally blink 10,000 times a day
The average length of a blink is 100 to 400
milliseconds
When you are nervous you blink a lot
The eyes on tortoises and hamsters blink
independently
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11. Oops, try again.
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12. Question 3True or false?
When your eye first receives
an image, the image is upside
down.
False
True
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13. WELL DONE!
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When your eye first
gets an image, the
image is upside down
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14. The lens and the brain
Light comes into the eye and the lens refracts the rays of light
which flips the image upside down onto the retina. The image
is then sent to the brain and gets flipped back the right way up
again. You would think it would take ages, but actually it's as
quick as a blink!
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question

15. Oops, try again.
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16. Question 4
What happens to your
pupil when you look at
something bright?
C
B
A It gets smaller
It gets bigger
They change colour
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C
B
A

17. WELL DONE!
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That's right, when
you look at
something bright your
pupil gets smaller.
More info

18. Oops, try again.
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19. Your pupils get smaller
to protect your retina
from light. Your iris is a
muscle which controls
how small or big your
pupils get.
Next
questi
on
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20. Question4
Do all animals have eyes?
B
C
A
Only humans have eyes that can
actually see things.
No
Of course they do
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A
C
B

21. WELL DONE!
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Some animals live in
caves so dark that eyes
would be completely
useless
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22. They have evolved over time so that they
use their other senses more instead of
eyesight
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question
The
Kentucky
Cave
Shrimp
The
Cave
Crayfish
The
Brazilian
Blind
Characid
Click on one of
these to find out
more

23. The Kentucky Cave
Shrimp
The Kentucky Cave Shrimp is
eyeless and transparent. They
live in a cave and are
endangered due to dams and
canals above the ground
which affects the water flow.
They are this
long
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24. The Cave Crayfish
Cave Crayfish can live up
to 75 years! They live in
only the United States
and there are 40 different
species of them.
They can be this long.
Back

25. The Brazilian
Blind Characid
The Brazilian Blind
Characid is related to the
piranha. The are found in
one 15.5 mile aquifer and
are very, very endangered.
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26. Oops, try again.
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27. Question 5
What is the optic
nerve?
It is a tube which runs around your body
to collect water for your eyes.
It is a nerve which takes information
from your eye to your brain.
It is a sensor above your eyelid which
senses when you need to blink
A A
B
CC
B
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28. The optic nerve connects
the eye with the brain.
Your eyes see the image
then send it to the brain.
Your brain then works
out what the image is
using its memory. MenuNext
question

29. WELL DONE!
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More info on
the optic nerve
The optic
nerve

30. Oops, try again.
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31. Question 6
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You have 40 features
unique to you on your
fingers. How many do you
have on your eye?
117
266
28
C
B
A
C
B
A

32. WELL DONE!
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More info on eye
prints

33. Do you reckon eye scans
will eye-dentify robbers in
the future?
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Next
NoYes

34. Yes
So do eye!
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35. No
But surely if your fingers
only have 40 features
unique to them and your
eyes have 266 then it must
be a better way to eye-
dentify people?
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36. Oops, try again.
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37. Thank you for doing
THE EYE QUIZ!
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