vision and the eye

structure and function of the eye

The human eye is an organ that is specialized to collect light and focus images. The structures of the human eye are shown in the Figure 1.1. Examine each structure in the diagram as you read about it below. The sclera, also known as the white of the eye, is an opaque outer covering that protects the eye. It keeps light out of the eye except at the center front of the eye. The cornea is a transparent outer covering of the front of the eye. It protects the eye and also acts as a convex lens. A convex lens is thicker in the middle than at the edges and makes rays of light converge, or meet at a point. The shape of the cornea helps focus light that enters the eye. The pupil is an opening in the front of the eye. It looks black because it doesnt reflect any light. All the light passes through it instead. The pupil controls the amount of light that enters the eye. It automatically gets bigger or smaller to let more or less light in as needed. The iris is the colored part of the eye. It controls the size of the pupil. The lens of the eye is a convex lens. It fine-tunes the focus so an image forms on the retina at the back of the eye. Tiny muscles control the shape of the lens to focus images of close or distant objects. The retina is a membrane lining the back of the eye. The retina has nerve cells called rods and cones that change images to electrical signals. Rods are good at sensing dim light but cant distinguish different colors of light. Cones can sense colors but not dim light. There are three different types of cones. Each type senses one of the three primary colors of light (red, green, or blue). The optic nerve carries electrical signals from the rods and cones to the brain. Q: The lens of the eye is a convex lens. How would vision be affected if the lens of the eye was concave instead of convex? A: A concave lens causes rays of light to diverge, or spread apart. It forms a virtual image on the same side of the lens at the object being viewed. Therefore, a concave lens would focus the image in front of the eye, not on the retina inside the eye. No signals would be sent to the brain so vision would not be possible.

textbook_image

how we see

The ability to see is called vision. This ability depends on more than healthy eyes. It also depends on certain parts of the brain, because the brain and eyes work together to allow us to see. The eyes collect and focus visible light. The lens and other structures of the eye work together to focus an image on the retina. The image is upside-down and reduced in size, as you can see in the Figure 1.2. Cells in the retina change the image to electrical signals that travel to the brain through the optic nerve. The brain interprets the electrical signals as shape, color, and brightness. It also interprets the image as though it were right-side up. The brain does this automatically, so what we see always appears right-side up. The brain also interprets what we are seeing. Q: The part of the brain that processes information from the eyes is the visual cortex. It is located at the back of the brain. How might an injury to the visual cortex affect vision? A: An injury to the visual cortex might cause abnormal vision or even blindness regardless of how well the eyes can gather and focus light.

textbook_image

instructional diagrams

description_image

The ability to see is called vision. The eyes sense light and form images which The brain then interprets. The images are formed by the eyes and the brain tells us what we are looking at. All creatures have different types of eyes, some are great at seeing vast distances such as the eagle or owl and some are able to pick up light in dark settings in order to see better at night, such as cats. Many people have issues with their vision but we have been able to correct this with lenses which come in the form of glasses or contact lenses. The eyes are made up of several parts the pupil, cornea, iris, lens, retina and the optic nerve which carries the images the eyes sees and takes the images to brain for it to interpret.

description_image

Below is a diagram of the structure of the eyeball. As you can see below, the eyeball is made up of various parts. One of the major parts is the cornea. The cornea of the eyeball is a clear covering that protects the eyeball. The light first comes through the cornea then goes through the pupil. The pupil is the opening in the center of the eyeball. The pupil is the dark part in the center of the iris, which is the colored part of the eye. The light then goes through the lens and reaches the retina. The retina is the part where the image first occurs. Then the optic nerves carries the impulses to the brain.

description_image

This picture shows the parts of the eye. The light enters the eye through the pupil. The cornea covers the eye and protects it from damage. The iris controls the size of the pupil. The size of the pupil changes based on the amount of light that enters the eye. The lens projects the image onto retina. The retina has nerve cells which transmit color and other information to the brain. The space between the lens and Retina is filled by a transparent liquid called Viterous gel. Fovea has the highest concentration of cone cells. Cone cells are responsible for seeing color and function best in bright light.

questions

the sclera is the opaque, white, outer covering of the eye.

-->  a. true

b. false

the lens is the only structure in the eye that focuses light.

a. true

-->  b. false

which of the following statements about the cornea is false?

a) it is transparent.

b) it helps focus light.

c) it helps protect the eye.

-->  d) none of the above

which structure controls the amount of light that enters the eye?

a) retina

b) lens

-->  c) pupil

d) none of the above

the membrane lining the back of the eye is the

a) cornea.

b) sclera.

-->  c) retina.

d) optic nerve.

rods are nerve cells that sense different colors of light.

a. true

-->  b. false

diagram questions

question_image

Identify the iris in this picture

a. X

b. C

c. L

-->  d. H

question_image

Which letter represents the Pupil?

a. Y

b. H

c. L

-->  d. P

question_image

Where is the iris?

-->  a. H

b. P

c. X

d. T

question_image

Which part focuses light on to the back of the eye?

a. C

b. Y

c. T

-->  d. L

question_image

Which label represents the retina?

a. V

b. P

-->  c. H

d. F

question_image

Which letter represents the optic nerve?

-->  a. K

b. L

c. H

d. V

question_image

From the diagram, what part of the eye looks like a lens?

a. H

b. N

-->  c. F

d. K

question_image

Identify the fovea

a. T

b. F

c. J

-->  d. E

question_image

Which letter is representing of the Retina?

a. F

b. T

c. E

-->  d. J

question_image

The lens projects an image onto which part of the eye?

a. R

b. Y

-->  c. J

d. E

question_image

Which label refers to the sclera?

-->  a. N

b. V

c. J

d. T

question_image

Which label represents the sclera?

a. J

-->  b. N

c. T

d. V

question_image

Identify the iris in this picture

a. V

b. N

c. C

-->  d. W

question_image

Where is the outer front layer of the eye?

a. Y

-->  b. E

c. S

d. V

question_image

Identify the optic nerve in this picture

a. J

b. R

-->  c. P

d. Y

question_image

Which label indicates the eye's choroid?

a. C

b. T

c. A

-->  d. V

question_image

It is known as the blind spot of the eye. Which?

a. K

-->  b. A

c. D

d. Y

question_image

What is the clear protective coating of the eye where light first passes through called?

a. PUPIL

-->  b. CORNEA

c. IRIS

d. LENS

question_image

Find out the lens.

a. E

-->  b. M

c. C

d. Y

question_image

Which letter represents the iris?

a. F

b. V

c. D

-->  d. E

question_image

Identify the pupil in this picture

a. H

b. T

-->  c. P

d. K

question_image

Which label refers to the retina?

a. J

b. Y

-->  c. E

d. V

question_image

Identify the sclera in the following image:

a. K

b. H

-->  c. V

d. W

question_image

Where is the iris?

-->  a. T

b. P

c. C

d. K

question_image

Where is the physiologic blind spot of the human eye?

a. H

-->  b. X

c. V

d. K

question_image

Which represents a clear, protective covering on the outside of the eye?

a. K

b. T

-->  c. C

d. P

question_image

Which label indicates IRIS?

a. U

b. N

c. R

-->  d. X

question_image

Which label stands for the retina?

a. V

-->  b. W

c. N

d. H

question_image

Identify the pupil of the eye:

a. W

-->  b. R

c. N

d. U

question_image

Where's the retina located?

a. Y

b. Z

-->  c. W

d. X

question_image

Select the lens.

a. U

b. X

c. R

-->  d. N

question_image

What is behind R?

a. IRIS

b. CORNEA

-->  c. LENS

d. PUPIL

question_image

Which represents a clear, protective covering on the outside of the eye?

a. R

b. X

c. W

-->  d. U

question_image

Identify the iris in this picture

a. P

-->  b. D

c. J

d. S

question_image

Which letter is representative of the Iris in this diagram?

a. J

b. H

-->  c. D

d. F

question_image

Which label shows the vitreous gel?

-->  a. W

b. V

c. T

d. M

question_image

Which letter represents the Macula?

a. M

-->  b. A

c. W

d. R

question_image

What goes between E and J?

a. R

-->  b. Y

c. W

d. A

question_image

Which fibers lead the optic information to the central nervous system?

a. R

b. M

c. T

-->  d. A

question_image

The vitreous gel is represented by the letter:

a. F

b. D

-->  c. S

d. N

question_image

Which label refers to the lens?

a. D

-->  b. W

c. S

d. V

question_image

Where on the eye does light pass through first?

a. D

-->  b. F

c. N

d. W

question_image

Which letter indicates the retina?

-->  a. S

b. H

c. A

d. D

question_image

What does A represent?

-->  a. CORNEA

b. IRIS

c. RETINA

d. LENS

question_image

Which represents a clear, protective covering on the outside of the eye?

a. H

b. X

c. T

-->  d. A

question_image

Which label shows the retina?

-->  a. N

b. L

c. J

d. X

question_image

Which letter identifies the Cornea in this diagram of the eye?

a. F

b. V

-->  c. L

d. J

question_image

Which is the cornea?

a. R

-->  b. L

c. W

d. J

question_image

Which part of the eye is colored?

a. E

b. N

c. W

-->  d. F

question_image

Which label refers to the pupil?

a. A

b. F

-->  c. U

d. W

question_image

Which letter is the Cornea in this diagram?

a. X

b. U

c. H

-->  d. N

question_image

Identify the sclera of the eye in the following image:

a. W

-->  b. F

c. N

d. H

question_image

Which letter represents a cornea?

a. F

-->  b. N

c. H

d. W

question_image

Where is the optic nerve?

a. N

b. H

-->  c. A

d. U

question_image

What is at the very back of the eye and goes to the brain?

a. CORNEA

b. SCLERA

c. LENS

-->  d. OPTIC NERV

question_image

Which label shows the iris?

-->  a. H

b. C

c. X

d. S

question_image

Which of the following labels represents the cornea?

a. N

-->  b. C

c. X

d. W

question_image

Which letter represents the macula?

a. H

-->  b. N

c. A

d. C

question_image

Where is the eyelid?

-->  a. A

b. N

c. C

d. H

question_image

Which represents a clear, protective covering on the outside of the eye?

a. H

-->  b. C

c. S

d. A

question_image

By what letter is the lens represented in the diagram?

-->  a. V

b. H

c. U

d. J

question_image

Which of the labeled elements is the pupil?

-->  a. H

b. M

c. V

d. U

question_image

Where is fovea in this picture?

a. V

-->  b. L

c. U

d. H

question_image

Which label identifies the pupil?

-->  a. H

b. U

c. K

d. V

question_image

Identify the label between the pupil and the cornea

-->  a. K

b. U

c. C

d. V

question_image

What does U represent?

a. RETINA

b. LENS

-->  c. CORNEA

d. PUPIL

question_image

Which letter is between the Retina and Sclera?

a. R

b. V

c. J

-->  d. N

question_image

Which represents the cornea?

-->  a. U

b. V

c. E

d. R

question_image

Which label identifies the retina in this diagram?

-->  a. Y

b. D

c. S

d. M

question_image

Which letter indicates the optic nerve?

a. P

b. E

c. U

-->  d. K

question_image

Which letter represents the vitreous humor?

a. T

b. P

-->  c. S

d. E

question_image

Which letter corresponds to the part that focuses the light into an image?

-->  a. V

b. P

c. U

d. E

question_image

Which label indicates the retina?

a. S

-->  b. K

c. X

d. Y

question_image

Which label refers to the cornea?

a. R

b. U

-->  c. C

d. M

question_image

What is the letter S being used to label?

-->  a. FOVEA

b. CHOROID

c. RETINA

d. SCLERA

question_image

Where is the choroid?

a. K

b. Y

c. S

-->  d. X

question_image

Where does light first pass through the eye?

-->  a. Cornea

b. Lens

c. Iris

d. Optic Nerve

question_image

Which is the innermost part of the eye?

a. 5

b. 2

-->  c. 7

d. 1

question_image

Which part of the eye controls the size of the pupil?

a. 6

b. 5

-->  c. 3

d. 2

question_image

After the light enters through the cornea and passes the pupil, where does it go next?

-->  a. Lens

b. Ciliary Muscle

c. Iris

d. Retina

question_image

The pupil is an opening in which part of the eye?

a. Cornea

b. Retina

c. Lens

-->  d. Iris

question_image

How many parts is the eye made of?

a. 8

b. 6

-->  c. 7

d. 5

question_image

How many parts make up the human eye?

-->  a. 7

b. 4

c. 8

d. 5

question_image

Please give the name for nearsightedness

-->  a. myopia

b. hyperopia

c. presbyopia

d. astigmatism

question_image

Which part focuses light on the back of the eye?

a. iris

-->  b. lens

c. pupil

d. ciliary muscle

question_image

Which part of the eye is treated with laser surgery to correct near-sightedness and far-sightedness?

-->  a. Cornea

b. Iris

c. Retina

d. Lens

question_image

Which part of the eye is located between the cornea and lens?

a. Fovea

b. Optic nerve

c. Retina

-->  d. Iris

question_image

What is the protective covering on the outside of the eye called?

-->  a. Cornea

b. Iris

c. Lens

d. Retina

question_image

What part of the eye connects it to the nervous system?

a. Fovea

b. Cornea

-->  c. Optic nerve

d. Pupol

question_image

What is the colored part of the eye called?

a. Lens

-->  b. Iris

c. Cornea

d. Retina

question_image

Which of the following parts adjusts the focus to produce an image?

a. iris

b. suspensory ligaments

-->  c. lens

d. pupil

question_image

What is the outermost layer of the eye called?

a. cornea

-->  b. sclera

c. retina

d. choroid

question_image

What part is in between the cornea and the pupil?

a. lens

b. cilliary muscle

-->  c. aqueous humour

d. retina

question_image

How many parts of the eye are shown?

a. 14

b. 17

-->  c. 16

d. 20

question_image

How many parts of the eye does light pass through?

a. 2

-->  b. 4

c. 5

d. 3

question_image

What is the area in blue called?

a. iris

b. retina

c. pupil

-->  d. lens

question_image

Which is the outermost part of eye?

a. Lens

b. Pupil

c. Iris

-->  d. Cornea

question_image

What is the thin layer that covers the back of the eye?

a. ciliary body

b. sclera

c. choroid

-->  d. retina

question_image

What is the coloured part of the eye called?

-->  a. Iris

b. Cornea

c. Lens

d. Pupil

question_image

Light sensitive layer that surrounds the Vitreous humor and lies under the choroid

a. Iris

b. Cornea

-->  c. Retina

d. Pupil

question_image

How many centers of visual field are there in the eye?

a. 3

-->  b. 1

c. 6

d. 2

question_image

How many parts of the eye does light go through before reaching the lens?

-->  a. 3

b. 4

c. 1

d. 2

question_image

What is between the pupil and the vitreous humor?

-->  a. lens

b. retina

c. fovea

d. choroid

question_image

What is the part of the eye commonly known as the white and forms the supporting wall of the eyeball, and is continuous with the clear cornea?

a. Choroid

-->  b. Sclera

c. Retina

d. Ciliary Body

question_image

What is the small film protecting the back of the eye called?

a. Iris

b. Choroid

c. Ciliary Body

-->  d. Retina

question_image

Which is the name of the nerve of the eyes?

a. retina

-->  b. optic nerve

c. iris

d. cornea

question_image

How many parts of the eye are between the vitreous body and the cornea?

a. 11

b. 1

c. 3

-->  d. 5

question_image

How many parts of the eye are shown?

a. 9

b. 8

-->  c. 11

d. 10

question_image

What is the front outer most structure?

a. Sclera

-->  b. Cornea

c. Iris

d. Lens

question_image

Identify the first layer of the eye.

-->  a. Cornea

b. Choroid

c. Sclera

d. Ciliary Body

question_image

What is the opening in the center of the eye through which light passes?

a. Iris

b. Cornea

-->  c. Pupil

d. Lens

question_image

What is holding the Lens in place?

a. Pupil

b. Iris

c. Cornea

-->  d. Suspensory Ligament

question_image

What part of the eye does light pass through first?

a. sclera

b. iris

-->  c. cornea

d. retina

question_image

How many parts make up the human eye?

a. 10

b. 8

c. 7

-->  d. 13

question_image

How many parts of the eye is being identified in the diagram?

-->  a. 13

b. 10

c. 12

d. 11

question_image

What lies between the Retina and the Sclera?

a. Iris

-->  b. Choroid

c. Fovea centralis

d. Lens

question_image

Which part is the outermost part of the eye?

a. ciliary body

b. iris

-->  c. cornea

d. pupil

question_image

What part of the eye is differently colored between people?

-->  a. Pupil

b. Cornea

c. Iris

d. Lens

question_image

In the diagram below which part of the eye consists of light-sensing cells called rods and cones?

a. Iris

b. Pupil

-->  c. Retina

d. Cornea

question_image

What is between the lens and the optic nerve?

a. Choroid

-->  b. Vitreus body

c. Cornea

d. Sclera

question_image

What is the opening in the center of the eye called?

a. optic nerve

-->  b. pupil

c. macula

d. choroid

question_image

How many eyes do we have?

-->  a. 2

b. 1

c. 3

d. 4

question_image

How many layers does the eyeball have?

a. 6

b. 5

c. 11

-->  d. 4

question_image

What is right next to the pupil?

a. sclera

b. choroid

c. optic nerve

-->  d. lens

question_image

Which part of the eye consists of special light-sensing cells called rods and cones?

a. Lens

b. Iris

-->  c. Retina

d. Sclera

question_image

Which part controls the diameter and size of pupil?

a. Retina

b. Cornea

-->  c. Iris

d. Lens

question_image

Light sensitive layer that surrounds the Vitreous humor and lies under the sclera

a. Cornea

b. Pupil

-->  c. Retina

d. Iris

question_image

What is the innermost part of the eye called?

a. Retina

-->  b. Vitreous

c. Pupil

d. Iris

question_image

How many parts of the eye are shown in the diagram?

-->  a. 7

b. 5

c. 6

d. 4

question_image

How many parts of the eye are shown in this diagram?

a. 3

-->  b. 7

c. 8

d. 5

question_image

What is the largest area called?

a. Cornea

-->  b. Vitreous

c. Retina

d. Iris

question_image

What opening does light pass through to get to the lens?

a. retina

b. sclera

c. vitreous

-->  d. pupil

question_image

Identify the pupil.

a. 5

-->  b. 4

c. 1

d. 3

question_image

What part fine-tunes the focus so an image forms on the back of the eye?

a. 5

-->  b. 4

c. 3

d. 2

question_image

Light sensitive layer that surrounds the Vitreous humor and lies under the choroid

-->  a. 10

b. 5

c. 2

d. 8

question_image

Which one of these structures is the cornea?

a. 4

b. 7

-->  c. 2

d. 3

question_image

Identify parts of the eye

a. 2

b. 3

-->  c. 13

d. 6

question_image

What is the part labelled '2' called?

a. ciliary muscle

-->  b. cornea

c. iris

d. lens

question_image

Where is the pupil?

-->  a. Behind the cornea

b. Before the Choroid

c. Over the iris

d. Below optic nerve

question_image

On what part of the eye the light form an object passes through?

a. Iris

-->  b. Cornea

c. Choroid

d. Lens

question_image

Part of the eye that is in between the iris and the pupil

a. cornea

-->  b. lens

c. macula

d. choroid

question_image

How many parts make up the front of the eye?

a. 1

-->  b. 6

c. 2

d. 4

question_image

How many parts of the eye are shown?

-->  a. 11

b. 9

c. 8

d. 10

question_image

What is right next to the cornea?

-->  a. anterior chamber

b. iris

c. lens

d. pupil

question_image

Where does the light reflected from an object passes first in a human eye?

a. Iris

-->  b. Cornea

c. Pupil

d. Anterior Chamber

question_image

What is the transparent outer covering that protects the eye?

a. Retina

b. Lens

c. Optic nerve

-->  d. Cornea

question_image

Where is the retina located?

a. Surrounding the macula

b. Surrounding the iris

-->  c. Surrounding the vitreous gel

d. Surrounding the pupil

question_image

Which part of the eye focuses light on the back of the eye?

a. Cornea

-->  b. Lens

c. Iris

d. Vitreous gel

question_image

Light sensitive layer that surrounds the Vitreous gel and lies under the choroid

a. Macula

-->  b. retina

c. Cornea

d. Iris

question_image

Which layer of the eye does the light pass through first?

a. pupil

b. optic nerve

-->  c. cornea

d. iris

question_image

How many parts of the eye are located behind the lens?

a. 1

b. 2

c. 9

-->  d. 5

question_image

The pupil is located in the center of which eye structure?

a. Optic nerve

-->  b. Iris

c. Lens

d. Cornea

question_image

What is between the pupil and the vitreous gel?

a. fovea

b. macula

-->  c. lens

d. optic nerve

question_image

What is the transparent outer covering of the eye called?

-->  a. Cornea

b. Pupil

c. Optic nerve

d. Iris

question_image

What does the optic nerve do?

a. Hear

b. Think

-->  c. Send signals to brain

d. See

question_image

What is the outermost part of the eye?

a. Retina

b. Pupil

c. Optix Nerve

-->  d. Cornea

question_image

How many components make up the human eye?

-->  a. 10

b. 9

c. 12

d. 11

question_image

How many parts of the eye are shown?

a. 7

-->  b. 10

c. 9

d. 8

question_image

What is the largest area of the eyeball called?

a. Pupil

b. Optic nerve

c. iris

-->  d. Vitreous gel

question_image

What is the purpose of the retina?

-->  a. This is where the image of the object normally forms

b. It carries the nerve impulses to the brain

c. focuses the light on the back of the eye

d. protective covering on the outside of the eye

question_image

Apart from the cornea, what's the name of the outermost layer around the figure in the diagram?

a. Macula

b. Cornea

c. Iris

-->  d. Sclera

question_image

What is in contact with the Vitreous Body?

a. Sclera

-->  b. Lens

c. Cornea

d. Iris

question_image

How many parts of the eye are shown in the diagram?

a. 6

b. 8

-->  c. 9

d. 7

question_image

How many parts of the eye are shown?

a. 7

b. 5

c. 6

-->  d. 8

question_image

What is the large empty part of the eye?

a. retina

b. cornea

-->  c. vitreous body

d. iris

question_image

What is the outer layer in the cross section of eye?

a. lens

b. pupil

-->  c. cornea

d. iris

question_image

Identify which is located right behind the pupil.

a. Retina

-->  b. Lens

c. Cornea

d. Optic Nerve

question_image

Light sensitive layer that surrounds the Vitreous humor and lies under the choroid

-->  a. Retina

b. Pupil

c. Cornea

d. Sclera

question_image

How many parts of the eye does light passes through?

a. 1

b. 4

-->  c. 3

d. 2

question_image

How many structures make up the inside of the eye?

a. 11

-->  b. 5

c. 6

d. 3

question_image

How many parts of the eye are labeled?

a. 14

b. 22

-->  c. 11

d. 1

question_image

What if the lens is removed?

a. can focus on particular distance

-->  b. can't focus on object in a particular distance

c. vision will be dark

d. cannot project image

question_image

Which is the clear, protective covering on the outside of the eye that light passes through first?

a. Iris

b. Pupil

-->  c. Cornea

d. Retina

question_image

Where light enters the eye.

a. Sclera

b. Cornea

c. Optic nerve

-->  d. Pupil

question_image

What is the colored part of the eye called?

a. sclera

b. pupil

-->  c. iris

d. cornea

question_image

Where does light pass through after the cornea?

a. crystalline lens

-->  b. pupil

c. ciliary zonule

d. iris

question_image

How many parts does the human eye have?

a. 9

-->  b. How many parts does the human eye have?

c. 11

d. 12

question_image

What happens when images focus in front of the retina because the eyeball is too long

-->  a. People with myopia can see nearby objects clearly, but distant objects appear blurry.

b. vision will be clear

c. nearby objects become blurry

d. far objects are clear

question_image

What is between the pupil and the vitreous body?

-->  a. crystalline lens

b. optic nerve

c. choroid

d. sclera

question_image

It is where the image of an object normally forms.

a. macula

b. iris

-->  c. retina

d. cornea

question_image

Which part is behind the iris?

a. Retina

-->  b. Lens

c. Sclera

d. Choroid

question_image

Light sensitive layer that surrounds the Vitreous humor and lies under the choroid

a. Lens

-->  b. Retina

c. Ciliary Body

d. Pupil

question_image

Which structure sends the image formed by the eye to the brain?

a. Iris

b. Pupil

c. Retina

-->  d. Optic Nerve

question_image

How many parts of the eye are identified in the diagram?

a. 13

b. 14

c. 12

-->  d. 15

question_image

Light enters the eye through this.

a. Conjunctiva

b. Choroid

c. Retina

-->  d. Pupil

question_image

What's inside the macula?

a. aqueous humour (watery fluid)

-->  b. vitrous humour (clear jelly)

c. conjuctiva

d. pupil

question_image

Where does the image of the outside world form in the eye?

-->  a. Retina

b. Cornea

c. Macula

d. Iris

question_image

Where does light pass through after the pupil?

-->  a. lens

b. eyelid

c. macula

d. cornea

question_image

What is the name of the hole located inside the Iris?

a. Cornea

b. Eyelid

-->  c. Pupil

d. Retina

question_image

What is the part of the eye that shows eye color?

a. Retina

-->  b. Iris

c. Pupil

d. Cornea

question_image

How many parts is the front side of the eye made of?

-->  a. 5

b. 3

c. 2

d. 1

question_image

Which part of this diagram protects the eye?

-->  a. eyelid

b. macula

c. cornea

d. iris

question_image

What is the transparent layer covering the eye?

-->  a. Cornea

b. Lens

c. Pupil

d. Iris

question_image

Which part of the eye helps us to focus?

a. Retina

b. Optic disc

c. Choroid

-->  d. Lens

question_image

What's covering the pupil?

a. sclera

b. choroid

c. retina

-->  d. iris

question_image

How many retinas are there?

a. 2

-->  b. 1

c. 5

d. 6

question_image

What are the red string like parts called?

a. sclera

-->  b. blood vessels

c. retina

d. iris

question_image

What opening does light pass through to get to the lens?

-->  a. pupil

b. cornea

c. retina

d. choroid

question_image

Identify which is in front of the lens.

a. Iris

-->  b. Pupil

c. Cornea

d. Retina

question_image

Which part regulates the amount of light that enters the eye?

a. Lens

b. Blood vessels

-->  c. Pupil

d. Retina

question_image

The fovea is located in the center of which of the following?

a. Retina

b. Blood vessels

-->  c. Macula

d. Lens

question_image

How many corneas are there?

a. 6

-->  b. 1

c. 3

d. 2

question_image

What is the dark circular feature called that is located near the back of the eye?

a. Retina

b. Lens

-->  c. Macula

d. Pupil

question_image

What occurs when images focus in front of the retina because the eyeball is too long?

a. conjunctivitis

-->  b. myopia

c. hyperopia

d. astigmatism

question_image

What is the name of the nerve located in the eye?

-->  a. Optic Nerve

b. Lens

c. Iris

d. Retina

question_image

What is the clear protective covering on the outside of the eye called?

a. Lens

b. Iris

c. Pupil

-->  d. Cornea

question_image

What is the clear, protective covering on the outside of the eye?

-->  a. Cornea

b. Retina

c. Lens

d. Iris

question_image

What is the first thing light touches?

-->  a. Cornea

b. Lens

c. Iris

d. Optic nerve

question_image

How many parts of the eye are behind the lens?

a. 1

b. 12

c. 3

-->  d. 5

question_image

How many parts of the eye are shown?

a. 9

-->  b. 11

c. 10

d. 7

question_image

What is between the iris and the vitreous humor?

-->  a. lens

b. optic nerve

c. retina

d. fovea

question_image

What is the biggest part of the eyeball?

a. iris

-->  b. vitreous humor

c. ciliary muscle

d. optic nerve

question_image

What is between the iris and the vitreous humor?

-->  a. lens

b. choroid

c. cornea

d. ciliary muscle

question_image

Which part is behind the Iris?

-->  a. Lens

b. Pupil

c. Cornea

d. Retina

question_image

What is in between the iris and the vitreous humor?

a. pupil

-->  b. lens

c. cornea

d. aqueous humor

question_image

How many eyes do we have?

a. 3

-->  b. 2

c. 4

d. 1

question_image

How many parts make up the human eye?

a. 7

-->  b. 12

c. 8

d. 10

question_image

What is the large empty space in the middle of the eye?

a. lens

b. iris

-->  c. vitreous humor

d. cornea

question_image

What opening does light pass through to get to the lens?

a. sclera

b. choroid

-->  c. pupil

d. ciliary muscle

question_image

What does the eye need to convey information to the brain?

-->  a. Light

b. Water

c. Air

d. Gas

question_image

It is where the light passes thru after the lens

a. Iris

b. Cornea

c. Optic Nerve

-->  d. Retina

question_image

How many parts of the eye are shown here?

a. 5

b. 4

-->  c. 6

d. 7

question_image

How many parts of the eye is being identified in the diagram?

-->  a. 6

b. 3

c. 4

d. 5

question_image

What opening does light pass through to get to the lens?

a. retina

b. optic nerve

c. cornea

-->  d. iris and pupil

question_image

What passes through the eye so we can see?

-->  a. Light

b. lens

c. Retina

d. Pupil

question_image

Which part of the eye is labeled 4?

a. Lens

b. Iris

c. Pupil

-->  d. Cornea

question_image

Which number points to the optic nerve?

a. 12

b. !

-->  c. 13

d. 11

question_image

The nerve impulses carried by the optic nerve passes through this structure first before it travels to the brain.

a. 10

-->  b. 11

c. 14

d. 13

question_image

How many parts compose the eye?

a. 6

-->  b. 14

c. 3

d. 5

question_image

Name the large fluid filled center of the eyeball

a. cornea

b. optic nerve

-->  c. vitreous chamber

d. lens

question_image

From the diagram, identify the part of the eye which is a clear, protective covering on the outside of the eye.

a. iris

b. retina

-->  c. cornea

d. lens

question_image

What is between sclera and retina?

a. Fovea.

-->  b. Choroid.

c. Suspensory ligaments.

d. Cornea.

question_image

What is the name of the external part of the eye?

a. iris

-->  b. cornea

c. lens

d. retina

question_image

How many chambers does the eye have?

a. 4

b. 1

c. 6

-->  d. 2

question_image

How many parts of the eye are there?

a. 12

-->  b. 10

c. 11

d. 15

question_image

What is right inside the center of the eyeball?

-->  a. vitreous chamber

b. suspensory ligaments

c. anterior chamber

d. lens

question_image

What will happen to the opening of the iris when there's a lot of light in front of the eye?

a. It will not react at all to the light

-->  b. It will become smaller

c. It will remain same

d. It will open larger to absorb the more light

question_image

The anterior chamber contains which fluid?

-->  a. Aqueous humor

b. Vitreous humor

c. Sclera humor

d. Corneal humor

question_image

How many chambers does the human eye have?

a. 3

-->  b. 2

c. 4

d. 1

question_image

How many parts of the eye are shown?

-->  a. 11

b. 12

c. 10

d. 9

question_image

What is the opaque, fibrous, protective, outer layer of the eye containing collagen and elastic fiber?

a. Lens

-->  b. Sclera

c. Iris

d. Retina

question_image

Which part is responsible for bringing data from the eye to the brain?

-->  a. optic nerve

b. lens

c. sclera

d. iris

question_image

What is in the outside of the Lens?

-->  a. Aqueous Body

b. Vitreous Body

c. Central Fovea

d. Optic Nerve

question_image

How many parts of the eye are shown?

-->  a. 9

b. 7

c. 10

d. 8

question_image

How many parts of the eye can be seen even without dissection?

a. 7

b. 6

c. 4

-->  d. 5

question_image

What carries nerve impulses from the eye to the brain?

a. Iris

b. Retina

c. Cornea

-->  d. Optic nerve

question_image

Which part of the eye is the first part that light passes through?

a. iris

-->  b. cornea

c. macula

d. pupil

question_image

Part of the eye in between the iris and the vitreous humor

a. pupil

-->  b. lens

c. cornea

d. macula

question_image

How many parts make up the human eye?

a. 7

b. 6

c. 10

-->  d. 13

question_image

How many parts of the eye are shown?

a. 10

b. 12

c. 11

-->  d. 13

question_image

What is the small orange circle between the blood vessels called?

-->  a. macula

b. iis

c. ciliary body

d. cornea

question_image

What opening does light pass through to get to the lens?

a. blood vessels

b. sclera

c. macula

-->  d. pupil

question_image

Which eye part sends imagery signals from the eye to the brain?

a. Retina

-->  b. Optic nerve

c. Vitreous

d. Macula

question_image

Which part is the eye's outermost lens?

a. Iris

b. Pupil

-->  c. Cornea

d. Retina

question_image

Which part of the eye has the eye color?

a. macula

b. cornea

-->  c. iris

d. retina

question_image

Light sensitive layer that surrounds the Vitreous and lies under the choroid

-->  a. Retina

b. Pupil

c. Cornea

d. Optic Nerve

question_image

Which structure sends the image formed by the eye to the brain?

a. Blind Spot

-->  b. Optic Nerve

c. Retina

d. Macula

question_image

How many blind spots are in the eye?

a. 2

-->  b. 1

c. 3

d. 4

question_image

How many structures make up the visible front of the eye?

a. 8

b. 2

-->  c. 3

d. 5

question_image

Identify the part of the eye that adjusts to control how much light enters the eye.

a. Cornea

-->  b. Iris

c. Retina

d. Lens

question_image

What is between the iris and the vitreous gel?

-->  a. lens

b. sclera

c. retina

d. posterior cavity

question_image

Where does light first pass through before entering the pupil?

-->  a. Cornea

b. Posterior cavity

c. Lense

d. Retina

question_image

How many cavities are there?

a. 4

b. 3

c. 1

-->  d. 2

question_image

Which part focuses light on the back of the eye?

a. posterior cavity

b. iris

c. cornea

-->  d. lens

question_image

Identify the pupil

a. A

-->  b. X

c. L

d. W

question_image

Identify the pupil

-->  a. L

b. N

c. V

d. F

question_image

Identify the pupil

-->  a. C

b. E

c. V

d. D