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IGCSE The Eye

Total questions: 18

Worksheet time: 27mins

Name
Class
Date
1.

Identify the structure that refracts light as it enters the eye

a)

Fovea

b)

Cornea

c)

Iris

d)

Lens

2.

State the light sensitive tissue found in the eye

(a)  

3.

Which structure contains two types of muscle and controls how much light can enter the eye?

a)

Iris

b)

Pupil

c)

Sclera

d)

Lens

4.

Identify the receptor that is sensitive to red, green and blue light

a)

Rod cell

b)

Thermoreceptor

c)

Mechanoreceptor

d)

Cone cell

5.

Which structure is a circular opening that lets light into the eye?

a)

Retina

b)

Blind spot

c)

Pupil

d)

Iris

6.

Identify the region at the back of the eye where there are no photoreceptors

(a)  

7.

Which structures can adjust in shape to focus light on the retina?

a)

Iris

b)

Lens

c)

Cornea

d)

Pupil

8.

#1 Refers to the clear tissue that covers the front of the eye

a)

Retina

b)

Cornea

c)

Pupil

d)

Iris

9.

#2 refers to

a)

optic nerve

b)

cornea

c)

iris

d)

pupil

10.

#7 Refers to the part of the eye that carried visual information from the eyeball to the brain

a)

lens

b)

optic nerve

c)

retina

d)

sclera

11.

# 5 refers to the layer of receptor cells at the back of the eye in which the image is focused

a)

Retina

b)

Lens

c)

Optic Nerve

d)

Lens

12.

gel substance that gives the eye shape

a)

optic nerve

b)

iris

c)

vitreous humor

d)

retina

13.
Which of the following is the correct order in which light travels through the eye?  
a)
Cornea, Lens, Retina, Pupil, Optic Nerve
b)
Pupil, Cornea, Lens, Retina, Optic Nerve
c)
Cornea, Retina, Lens, Pupil, Optic Nerve
d)
Cornea, Pupil, Lens, Retina, Optic Nerve
14.

Where does light refract?

a)

Lens

b)

Cornea

c)

Pupil

d)

Optic Nerve

15.

Which part of the eye contains rods and cones?

a)

Cornea

b)

Lens

c)

Retina

d)

Vitreous Humor

16.
In dim light, your pupil will be 
a)
larger
b)
smaller
17.
In bright light, your pupil will be
a)
larger
b)
smaller
18.
In order for your brain to process the light waves that enter your eye, what must your eye do to those waves before sending them to the brain?
a)
Nothing, the light waves just get sent to the brain.
b)
Light waves have to be converted into sound waves by the eye. 
c)
Light waves have to be converted into nerve impulses by the eye. 
d)
Light waves have to be refracted by the eye. 

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