Anatomy of the Eye

Question 1

Name the three coats of the eyeball.

Answer 1

Fibrous coat
Vascular coat
Sensory coat

Question 2

Which layer is the outer layer?

Answer 2

Fibrous coat

Question 3

Which coat of the eyeball contains collagen?

Answer 3

Fibrous coat

Question 4

Which cranial nerve goes out from the posterior aspect of the eyeball?

Answer 4

CN II, optic nerve

Question 5

Name the two components of the fibrous coat of the eyeball.

Answer 5

Cornea
Sclera

Question 6

What is the sclera?

Answer 6

White of the eye, forms posterior 5/6 of eyeball

Question 7

Name the three parts of the vascular coat of the eyeball.

Answer 7

Iris
Choroid
Ciliary body

Question 8

Which part of the sensory coat gives colour of the eye?

Answer 8

Iris

Question 9

What makes up the sensory coat of the eyeball?

Answer 9

The retina

Question 10

The retina ends in a serrated margin just anterior to the equator of the eye. What is the name of this serrated margin?

Answer 10

Ora serrata

Question 11

What makes up the anterior 1/6 of the fibrous coat of the eye?

Answer 11

Cornea

Question 12

What is the cornea?

Answer 12

Transparent window which allows light rays into the eyes

Question 13

Both the sclera and the cornea contain collagen. What is different about the collagen in the sclera?

Answer 13

Collagen fibres of different diameters arranged irregularly to give white appearance.

Question 14

Both the sclera and the cornea contain collagen. What is different about the collagen in the cornea?

Answer 14

Very fine, uniform fibres which allows the light to pass through it

Question 15

What does the iris do?

Answer 15

Controls diameter of pupil

Question 16

What is the function of the ciliary body?

Answer 16

Suspends lens
Produces aqueous humor

Question 17

What is aqueous humor?

Answer 17

Fluid which fills the space in front of the lens

Question 18

What is the role of the choroid?

Answer 18

Richly vascular and supplies blood to outer layers of the retina

Question 19

What does the retina contain?

Answer 19

Light sensitive rods and cones which help us to see

Question 20

What is found in the anterior segment of the eye?

Answer 20

Aqueous humor

Question 21

What is found in the posterior segment of the eye?

Answer 21

Vitreous humor

Question 22

What is vitreous humor?

Answer 22

Gel which helps push the retina against the choroid.

Question 23

Why is everything in the path of the light rays transparent?

Answer 23

To allow light rays to travel to retina and activate rod and cone cells

Question 24

Describe the crystalline lens.

Answer 24

Transparent, bi-convex, and suspended from the ciliary body by zonules.

Question 25

What does the aqueous humor help to maintain?

Answer 25

Intraocular pressure

Question 26

Where is the anterior and posterior chambers of the eyes?

Answer 26

Anterior- in front of iris
Posterior- behind iris but in front of lens

Question 27

Where is the anterior and posterior segments of the eyes?

Answer 27

Anterior- in front of lens
Posterior- behind lens

Question 28

What does the canal of Sclemm do?

Answer 28

Reabsorbs aqueous humor.

Question 29

Surface anatomy.
Name the:

1. White of the eye
2. Colour of the eye
3. Reflection seen on the surface of the eye

Answer 29

1. Sclera
2. Iris
3. Cornea

Question 30

Name the condition where the lens of the eye has started to opacify.

Answer 30

Cataracts