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How the Eyes Work

Total questions: 37

Worksheet time: 15mins

Name
Class
Date
1.
Which layer is a blood vessel-rich layer with a dark brown membrane located between the retina and the sclera? 
a)
Choroid
b)
Sclera
c)
Retina
d)
Cornea
2.
What is the point where there are no photoreceptors and is considered a "blind spot"?
a)
Optic nerve
b)
Fovea centralis
c)
Optic disc
d)
Lens
3.
What is the innermost layer and most delicate layer of the eyeball where photoreceptors are located?
a)
Sclera
b)
Choroid
c)
Retina
d)
Cornea
4.
The vitreous humor is a fluid contained in the anterior segment of the eye.
a)
True
b)
False
5.
Which part of the eye contracts and dilates based on the environment? 
a)
Pupil
b)
Cornea
c)
Sclera
d)
lens
6.

What is letter B

a)

Optic nerve

b)

Lens

c)

Cornea

d)

Retina

e)

Pupil

7.
What is letter E?
a)
Vitreous humor
b)
Retina
c)
Cornea
d)
Optic nerve
8.

What is letter G?

a)

Sclera

b)

Retina

c)

Lens

d)

Vitreous humor

e)

Pupil

9.

What is letter I?

a)

Cornea

b)

Lens

c)

Vitreous humor

d)

Optic nerve

e)

Pupil

10.
Photoreceptors that detect grey tones in low light are called...
a)
Rods
b)
Cones
11.
The white portion of the eye (In Humans).
a)
Pupil
b)
Sclera
c)
Dyslexia
d)
Retina
12.
What does the tapetum Lucidum 
a)
Gives animals night vision
b)
Transparent jelly like fluid 
c)
Colored part of the eye
d)
Area where the optic nerve attaches
13.
What is the function of the pupil?
a)
Sends messages picked up by the retina to the brain
b)
The hole that controls the different amounts of light
c)
the colored part of the eye that controls the size of the pupil
d)
transparent jelly like fluid that fills the eye and refracts light
14.
Opens and closes to adjust the total amount of light entering the eye.
a)
Iris
b)
Scelera
c)
Cornea
d)
Human lens
15.
Light entering the eye is focused behind the retina instead of directly on it, objects close to the eye look blurry
a)
Iris
b)
Near Sighted
c)
Astigmatism
d)
Far Sighted
16.
what is this?
a)
Aqueous Humor
b)
Vitreous Humor
17.
Which one of the following correctly lists the order of the parts through which light passes?
a)
cornea, aqueous humor, lens, vitreous humor
b)
aqueous humor, cornea, lens, vitreous humor
c)
lens, aqueous humor, cornea, vitreous humor
d)
vitreous humor, lens, aqueous humor, cornea
18.
People with this type of vision can see things clearly when they are up close, but things are blurry far away.
a)
Emmetropia
b)
Hyperopia
c)
Myopia
d)
Far sighted
19.
What part of the eye is this (hint: contains the highest concentration of rods and cones)
a)
choroid
b)
fovea centralis
c)
optic nerve
d)
ciliary body
20.
What part of the eye controls lens shape?
a)
choroid
b)
lens
c)
iris
d)
ciliary body
21.

#3 is

a)

Sclera

b)

Extrinsic Eye Muscle

c)

Optic Nerve

d)

Conjunctiva

22.

#1 is

a)

Conjunctiva

b)

Extrinsic Eye Muscle

c)

Optic Nerve

d)

Cornea

23.

#5 is

a)

Cornea

b)

Sclera

c)

Optic Nerve

d)

Conjunctiva

24.

#1 is

a)

Eyelid

b)

Optic Nerve

c)

Suspensory Ligaments

d)

Pupil

25.

#9 is

a)

Iris

b)

Retina

c)

Cornea

d)

Conjunctiva

26.

#3

a)

Iris

b)

Optic Nerve

c)

Ciliary Body

d)

Optic Disc

27.

A clear fluid that helps the cornea keep its rounded shape

a)

aqueous humor

b)

blind spot

c)

cones

d)

cornea

28.

The place where all nerves from the retina join to form the optic nerve. Each eye has a _____ _____ where there are no light-sensitive cells

a)

aqueous humor

b)

blind spot

c)

cones

d)

cornea

29.

One kind of light-sensitive cell in the retina. Cones give you color vision in bright light.

a)

aqueous humor

b)

blind spot

c)

cones

d)

cornea

30.

A tough, clear covering over the iris and the pupil that helps protect the eye. Light bends as it passes through the _______ The cornea begins bending light to make an image; the lens finishes the job.

a)

aqueous humor

b)

blind spot

c)

cones

d)

cornea

31.

A muscle that controls how much light enters the eye. It is suspended between the cornea and the lens. Human ________ come in many colors, including brown, blue, green, and gray.

a)

iris

b)

lens

c)

myelin

d)

optic nerve

32.

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)

iris

b)

lens

c)

myelin

d)

optic nerve

33.

The layer of light-sensitive cells at the back of the eye. The _________ detects images focused by the cornea and the lens. The __________ is connected to the brain by the optic nerve.

a)

pupil

b)

retina

c)

rods

d)

sclera

34.
An increase in ocular pressure may develop into _________ for a patient. The patient may have mild visual disturbances and little to no pain.
a)
cataract
b)
glaucoma
c)
conjunctivitis
d)
astigmatism
35.
Clouding, of the normally clear lens, in the eye.
a)
Alzheimer's disease
b)
Organ procurement
c)
Spina bifida
d)
Cataract
36.

Focal point is behind the eyeball

a)

Myopia

b)

Hyperopia

c)

Both

37.

Focal point is in front of retina

a)

Myopia

b)

Hyperopia

c)

Both

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