The Eye QuizDesigned by Esme Mirzoeff

Start

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.

Your brain is now switched on!

Next

A

Question 1

What is the white part in your eye

called?

B

C Iris

Retina

Sclera

Menu Menu

C

A

B

WELL DONE!

Menu

The sclera is the white outer

coating of the eye

More info

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 eyeThe optic nerve is

joined to the sclera at the back of the

eye.

Next

Oops, try again.

Try again Menu

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

Menu Menu

C

B

A

WELL DONE!

You blink to keep

your eyes moist

Menu

More info

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

Next question

Oops, try again.

MenuTry

again

Question 3True or false?

When your eye first receives an image, the image is upside down.

False

True

Menu Menu

WELL DONE!

MenuWhen your eye first gets an image, the

image is upside down

More info

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!

Next question

Oops, try again.

MenuTry

again

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

Menu Menu

C

B

A

WELL DONE!

Menu

That's right, when you look at

something bright your pupil gets

smaller.

More info

Oops, try again.

MenuTry

again

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 Exit

Menu

Question

4

Do all animals have eyes?

B

C

A

Only humans have eyes that can actually see things.

No

Of course they do

Menu Menu

A

C

B

WELL DONE!

Menu

Some animals live in caves so dark that

eyes would be completely useless

More info

They have evolved over time so that they use their other senses more

instead of eyesight

Next questio

n

The Kentucky

Cave Shrimp

The Cave

Crayfish

The Brazilian

Blind Characid

Click on one of these to find out

more

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

Back

The Cave CrayfishCave 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

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.Back

Oops, try again.

MenuTry

again

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

blinkA A

B

CC

B

Menu Menu

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. Menu

Next questio

n

WELL DONE!

Menu

More info on the optic

nerve

The optic nerve

Oops, try again.

MenuTry

again

Question 6

Menu MenuYou 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

WELL DONE!

Menu266

More info on eye prints

Do you reckon eye scans will eye-dentify robbers in the future?

Menu

Next

NoYes

Yes

So do eye!

Next

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?

Next

Oops, try again.

MenuTry

again

Thank you for doing THE EYE QUIZ!

Menu