Anatomy

Question 1

Which bone makes up the roof of the orbit?

Answer 1

Frontal bone

Question 2

Name the orbital structures?

Answer 2

1) Eyeball
2) Nerves
3) Muscles
4) Blood Vessels
5) Lacrimal Gland
6) Fat

Question 3

Which cranial nerves are part of the orbit?

Answer 3

1) Optic (CN 2)
2) Oculomotor (CN 3)
3) Trochlear (CN 4)
4) Trigeminal (CN 5¹ and 5²)
5) Abducent (CN 6)

Question 4

Name the muscles part of the orbit.

Answer 4

1) Extraocular Muscles- EOM
2) Levator Palpebrae Superioris

Question 5

The wall of the eye has 3 tunics:

Answer 5

1) Sclera
2) Choroid
3) Retina

Question 6

The cornea is responsible for __ of the refractive power of the eye

Answer 6

2/3

Question 7

Is the cornea vascular or avascular?

Answer 7

Avascular

Question 8

The cornea is made of:

Answer 8

Collagen type 1

Question 9

The sclera is covered by the __
anteriorly.

Answer 9

Conjunctiva

Question 10

The sclera is the ___ (thinnest/thickest) in the area surrounding the optic nerve.

Answer 10

Thickest

Question 11

The sclera is made up of three divisions:

Answer 11

1) Episclera
2) Sclera proper
3) Lamina fusca

Question 12

The episclera is made up of:

Answer 12

Loose connective tissue

Question 13

The lamina fusca is made up of:

Answer 13

Elastic fibers

Question 14

What gives attachment to extraocular muscles?

Answer 14

Sclera

Question 15

The sclera allows the passage of the ___ posteriorly.

Answer 15

Optic nerve

Question 16

Limbus-Corneoscleral Junction is a common site for:

Answer 16

Surgical incisions

Question 17

The Limbus-Corneoscleral Junction contains which cells?

Answer 17

Stem cells

Question 18

The anterior chamber is filled with:

Answer 18

Aqueous humor

Question 19

The anterior chamber is the space between:

Answer 19

Cornea and the iris/lens

Question 20

The Irido-corneal Angle contains:

Answer 20

The aqueous drainage system:

1) Trabecular meshwork
2) Schlemm’s canal

Question 21

The Crystalline Lens are held in place by:

Answer 21

Zonules (suspensory ligaments) of the ciliary body

Question 22

The ciliary body connects:

Answer 22

Iris + Choroid

Question 23

The ciliary body has 2 parts:

Answer 23

1) Pars Plicata (Ciliary processes)
2) Pars Plana

Question 24

When looking at a distant object, the ciliary muscle ___ (contracts/relaxes), while the suspensory ligaments ___ (contract/relax).

Answer 24

Relaxes; Contract

Question 25

When looking at a nearby object, the ciliary muscle ___ (contracts/relaxes), while the suspensory ligaments ___ (contract/relax).

Answer 25

Contracts; Relax

Question 26

Tight ligaments = __ (flat/round) lens.

Answer 26

Flat

Question 27

Loose ligaments = __ (flat/round) lens.

Answer 27

Round

Question 28

The posterior chamber is the space between:

Answer 28

ciliary body and iris/lens

Question 29

The choroid extends from:

Answer 29

The optic nerve to the ciliary body (at ora serrata)

Question 30

The __ of the retina provides the greatest resolving power of the eye.

Answer 30

Center (Macula)

Question 31

The center of the macula is called the __.

Answer 31

Fovea

Question 32

Peripherally, the retina has dentate/teeth like processes called __.

Answer 32

Ora Serrata

Question 33

The vitreous body contains:

Answer 33

1) Collagen
2) Hyaluronic acid
3) Water

Question 34

Most common complication of roof fractures?

Answer 34

CSF leak

Question 35

Which orbital wall is the thickest?

Answer 35

Lateral

Question 36

Which orbital wall is the thinnest?

Answer 36

Medial

Question 37

Most common orbital fracture site?

Answer 37

Floor

Question 38

Which nerve is affected in floor fractures?

Answer 38

Infraorbital nerve