MCQs - Examination of the Eye

Question 1

When diagnosing dendritic corneal ulceration, the ideal stain to use is

a. Rose Bengal
b. Toluidine blue
c. Fluoroscein
d. Proxymetacaine

Answer 1

Rose Bengal

Question 2

When on a setting of +20 D, the direct ophthalmoscope will allow the user to focus on the

a. Retina
b. Cornea
c. Lens
d. Irido-corneal angle

Answer 2

Cornea

Question 3

Question 3
An intact Purkinje image on the cornea suggests:

a. The presence of early KCS
b. Functioning flash unit on your camera
c. Absence of lipid layer from Meibomian glands
d. A healthy corneal surface and tear film

Answer 3

d. A healthy corneal surface and tear film

Question 4

Question 4
In distant direct ophthalmoscopy, opacities in the clear optic media
a. Do not affect the fundic reflex
b. Appear white
c. Render this technique obsolete
d. Appear black

Answer 4

d. Appear black

Question 5

Question 5
In indirect ophthalmoscopy, the strength of the lens is:

a. Directly correlated to the field of view
b. Not having any effect on the image seen
c. Important in improving binocularity
d. Directly correlated to the degree of magnification

Answer 5

Directly correlated to the field of view

Well done. High dioptre lenses offer a wide field of view. Therefore there is a direct (positive) correlation between these factors.

Question 6

Question 6
In healthy cats, STT readings:

a. Are never lower than 15mm/min
b. Can be as low as 10mm/min
c. Can be as low as 5mm/min
d. Can vary markedly on different days

Answer 6

d.Can vary markedly on different days

Well done. Although readings vary markedly, comparison between eyes can be useful.
The correct answer is: Can vary markedly on different days

Question 7

Question 7
The Tono-vet tonometer works on the principle of:

a. Rebound
b. Indentation
c. Applanation
d. Elevation

Answer 7

The Tono-vet tonometer works on the principle of:

a.Rebound

Question 8

Question 8
Which of the following is NOT a cause for an absent menace response in a sighted dog?

a. Facial paralysis
b. Cerebellar hypoplasia
c. Trigeminal function loss
d. Stress response

Answer 8

Which of the following is NOT a cause for an absent menace response in a sighted dog?

c. Trigeminal function loss

Well done. The menace response should be present in this situation

Question 9

Question 9
Following induction of mydriasis with atropine, which of the following responses is absent?

a. Direct PLR
b. Blink response
c. Indirect PLR to the fellow eye
d. Menace response

Answer 9

Following induction of mydriasis with atropine, which of the following responses is absent?

a.Direct PLR

Well done. A direct PLR will be absent as the iris will be unable to constrict due to the pharmacological blockade provided by atropine

Question 10

Question 10
To visualise flare on slit lamp examination, the ideal setting includes

a. Blue light, narrow slit
b. Low illumination, wide slit
c. Moderate illumination, wide slit
d. High illumination, narrow slit

Answer 10

To visualise flare on slit lamp examination, the ideal setting includes

d.High illumination, narrow slit