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How the Eyes Work

Total questions: 22

Worksheet time: 25mins

Name
Class
Date
1.
Which parts of your eye are transparent?
a)
retina
b)
optic nerve
c)
cornea and lens
d)
iris
2.
This part of the eye carries the message from your eye to the part of your brain that controls vision. 
a)
cornea
b)
lens
c)
optic nerve
d)
retina
3.
In dim light, your pupil will be 
a)
larger
b)
smaller
4.
In bright light, your pupil will be
a)
larger
b)
smaller
5.
The part of your eye that gives it its color.  It is a muscle that controls the size of your pupil.
a)
cornea
b)
lens
c)
pupi
d)
iris
6.
The back of the eye;  an upside-down image of whatever you are looking at is projected here. 
a)
lens
b)
cornea
c)
pupi
d)
retina
7.
The first part of the eye that light hits. 
a)
lens
b)
cornea
c)
pupil
d)
retina
8.
The layer of receptor cells that lines the back of the eye where nerve impulses begin.
a)
Iris
b)
Lens
c)
Retina
d)
Pupil
9.
Lens
a)
Clear tissue that covers the eye
b)
Opening of the eye
c)
Focuses the light
d)
Regulates amount of light
10.
What is letter B
a)
Optic nerve
b)
Lens
c)
Cornea
d)
Retina
11.
What is letter E?
a)
Vitreous humor
b)
Retina
c)
Cornea
d)
Optic nerve
12.
What is letter I?
a)
Cornea
b)
Lens
c)
Vitreous humor
d)
Optic nerve
13.

This part of the eye changes shape to focus light on the retina...

a)

Iris

b)

Pupil

c)

Lens

d)

Ciliary body (muscle)

14.
Pupil
a)
Focuses light
b)
Clear tissue that covers the front of the eye
c)
Opening through which light enters the eye
d)
Layer of receptor cells
15.
This part of the eye carries the message from your eye to the part of your brain that controls vision. 
a)
cornea
b)
lens
c)
optic nerve
d)
retina
16.
Which of these is true?
a)
Cone cells detect light and dark
b)
Rods focus light
c)
Cones detect color
d)
Rods detect color
17.

Detects brightness

a)

Rods

b)

Cones

18.

The thick, tough, white outer covering of the eyeball is called the __________________.

a)

sclera

b)

lens

c)

pupil

d)

cornea

19.

The place where the optic nerve leaves the retina, where there are no light-sensitive cells is the ________________.

a)

lens

b)

cornea

c)

blind spot

d)

sclera

20.

The ________________ is the dark circle in the center of your iris that lets light into the inner eye.

a)

retina

b)

cornea

c)

iris

d)

pupil

21.

A clear, flexible structure that makes an image on the eye's retina. The _______________ is flexible so that it can change shape, focusing on objects that are close up and objects that are far away.

a)

lens

b)

cornea

c)

pupil

d)

retina

22.

Identify the part of the eye colored red in this diagram.

a)

cornea

b)

pupil

c)

iris

d)

sclera

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