Ophthalmology

Question 1

A patient that is stuck looking upwards has likely damaged which nerve?

Answer 1

Trochlear

Question 2

Which part of obicularis oculi is involved in normal blinking?

Answer 2

Palpebral

Question 3

Which nerve is involved in tear sensation?

Answer 3

CN V

Question 4

Which nerve is involved in parasympathetic control of tear production?

Answer 4

CN VII

Question 5

To get from 3rd ventricle –> 4th, which space does CSF flow through?

Answer 5

Cerebral aqueduct

Question 6

In an eye with ptosis and positioned down and out, which nerve has suffered a palsy?

Answer 6

Oculomotor

Question 7

At which spinal level is a lumbarpuncture taken?

Answer 7

L3-5

Question 8

Which nerve is involved in the sensory arm of the blink reflex?

Answer 8

CN V

Question 9

Which nerve is involved in the motor arm of the blink reflex?

Answer 9

CN VII

Question 10

Which type of photoreceptor is found at a higher density over the fovea?

Answer 10

Cones

Question 11

Through what structure do superior and inferior ophthalmic veins drain to the cavernous sinus through?

Answer 11

Superior orbital fissure

Question 12

Which layer of the retina never regenerates?

Answer 12

Endothelium

Question 13

Which nerve supplied sensory innervation to the dura mater?

Answer 13

CN V

Question 14

Describe the effect of near vision on ciliary muscles, suspensory ligaments and lens shape

Answer 14

Ciliary muscle - contracts
Ligaments - relax
Lens - becomes spherical

Question 15

Describe the effect of far vision on ciliary muscles, suspensory ligaments and lens shape

Answer 15

Ciliary muscle - relaxes
Ligaments - contract
Lens - becomes flattened

Question 16

Are there Langerhans cells in the cornea? Where are they located?

Answer 16

Yes

In the peripheral cornea

Question 17

Describe the expression of MHC cells in the cornea.

Answer 17

MHC I - low expression

MHC II - no expression