Anatomy of the eye

Question 1

1) Which among the following is the transparent and avascular structure that obtains its nutrition from the limbal vessels, aqueous and tears?
a) Cornea
b) Iris
c) Lens
d) Vitreous

Answer 1

A

Question 2

3) Which among the following is the posterior portion of the uveal tract located between the retina and the sclera?
a) Choroid
b) Peripheral retina
c) Macula
d) Foveola

Answer 2

A

Question 3

4) Which is the EOM that is innervated by CN VI?
a) Superior Rectus
b) Inferior Rectus
c) Medial Rectus
d) Lateral Rectus

Answer 3

D

Question 4

5) Which among the following EOM inserts furthest from the limbus?
a) Superior Rectus
b) Lateral Rectus
c) Inferior Rectus
d) Medial Rectus

Answer 4

A

Question 5

6) Which bone primarily forms the floor of the orbit?
a) Maxillary bone
b) Sphenoid bone
c) Palatine bone
d) Zygomatic bone

Answer 5

A

Question 6

7) Which is the thickest wall of the orbit?
a) Inferior wall
b) Lateral wall
c) Roof of the orbit
d) Medial wall

Answer 6

B

Question 7

8) The nasolacrimal duct opens into the nose via the:
a) Inferior meatus
b) Superior meatus
c) Lateral meatus
d) Middle meatus

Answer 7

A

Question 8

9) Which of the following vessel/vessels supplied the nutrition of the outer third of the retina?
a) Central vessels of the retina
b) Anterior and Posterior Ciliary Vessels
c) Choroidal vessels
d) Vessels of the ciliary body

Answer 8

C

Question 9

10) Which is the weakest spot in the outer fibrous tunic of the eye?
a) Macula
b) Equator
c) Ora serrate
d) Lamina Cribrosa

Answer 9

B

Question 10

11) Pupil size is determined by the balance between constriction and dilation which are controlled by the tandem of the:
a) Trigeminal Nerve and the optic nerve
b) Trochlear nerve and the parasympathetics
c) Oculomotor nerve and the sympathetics
d) Optic never and the sympathetics

Answer 10

C

Question 11

12) Which of the following shows the correct arrangement of the layers of the cornea from aqueous humour to the atmosphere?
a) Endothelium, Stroma, Bowman’s Membrane
b) Endothelium, Descemet’s Membrane, Bowman’s Membrane
c) Stroma, Bowman’s Membrane, Epithelium
d) Bowman’s membrane, Descemet’s Membrane, Epithelium

Answer 11

C

Question 12

13) The bull’s eye of the eye if made up of:
a) A single layer of cones only
b) A single layer of rods only
c) A single layer of rods and cones
d) A single layer of rods and two layers of cones

Answer 12

A

Question 13

14) The retina has essentially 10 layers. Visual stimuli are sent to the optic nerve in a relay system composed of these neurons. These three neurons are located in layers. The three layers of the retina which contain the “RELAY” neurons are the:
a) RPE, Rods and Cones, and the Outer Plexiform Layer
b) Rods and Cones, Outer Nuclear Layer, and Inner Nuclear Layer
c) Outer Nuclear Layer, Inner Nuclear Layer, and Ganglion Cell Layer
d) Outer Plexiform Layer, Inner Plexiform Layer, and Nerve Fiber Layer

Answer 13

C

Question 14

15) What elements are present in the inner plexiform layer?
a) Photoreceptors
b) RPE
c) Ganglion
d) Nerve fiber layer

Answer 14

C

Question 15

16) What is the afferent limb of the pupillary response?
a) Optic nerve
b) Oculomotor nerve
c) Parasympathetic branch only of the Oculomotor never
d) Sympathetic branch of the trigeminal nerve

Answer 15

A

Question 16

72) The lens consists of 65% and 35% protein. It has no innervation nor blood vessels. T/F

Answer 16

T

Question 17

73) The extracellular space of the retina can accumulate fluid due to breakdown of the inner blood retinal barrier.. T/F

Answer 17

T

Question 18

74) The Medial Rectus, Superior Rectus, Inferior Rectus, and the Inferior Oblique are innervated by the Oculomotor Nerve.

Answer 18

T

Question 19

95) Aqueous humour flows from the anterior chamber to the posterior chamber from where it exists the eye. T/F

Answer 19

F

Question 20

98) The two sources of the retinal blood supply are the anterior and posterior ciliary artery. T/F

Answer 20

F

Question 21

99) One of the reasons why the cornea is clear is because it has no stromal blood vessels. T/F

Answer 21

T

Question 22

100) The optic nerve is made of retinal ganglion cell axons. T/F

Answer 22

T

Question 23

The orbital apex is the entrance of all nerves and blood vessels to the eye and all extraocular muscles except which?

Answer 23

Inferior oblique

Question 24

The superior opthalmic vein, lacrimal frontal and trochlear nerves pass through the (lateral/medial) portion of the SOF that lies (inside/outside) the annulus of Zinn.

Answer 24

Lateral, outside

Question 25

The superior and inferior divisions of the oculomotor nerve and abducens and nasocilliary nerves pass through the (lateral/medial) portion of the SOF that lies (inside/outside) the annulus of Zinn.

Answer 25

Medial, inside

Question 26

The optic canal lies (inside/outside) the annulus of Zinn.

Answer 26

Inside

Question 27

The opthalmic artery and optic nerve pass through which orbital opening?

Answer 27

Optic canal