CO Ocular Motility Evaluation & Binocular Vision Assessment 2

Question 1

Which test best quantifies the angle of deviation in a patient who cannot fixate with either eye?

Accepted Answer

Krimsky test

Answer

The Krimsky test uses prisms over the deviating eye to center the corneal light reflex, estimating the angle when fixation is poor.

Question 2

During the cover-uncover test, the covered eye moves outward when uncovered. This indicates:

Accepted Answer

Esotropia

Answer

An outward refixation movement on uncovering means the eye was deviated inward (esotropia) under the cover.

Question 3

Which cyclovertical muscle is tested by asking the patient to look down and in?

Accepted Answer

Superior oblique

Answer

The superior oblique's primary depressor action is greatest when the eye is adducted, so looking down and in isolates it.

Question 4

A patient with a positive Worth 4-dot test showing 5 lights at near but fusion at distance most likely has:

Accepted Answer

Intermittent exotropia with divergence excess

Answer

Intermittent exotropia with divergence excess pattern shows fusion at near (smaller deviation) but suppression/diplopia at distance (larger deviation).

Question 5

The Maddox rod test dissociates the eyes by:

Accepted Answer

Converting a point light source into a streak seen only by one eye

Answer

The grooved glass converts the white dot of light into a red streak, preventing fusion and revealing the phoria.

(CO) Certified Orthoptist Practice Test

(CO) Certified Orthoptist Practice Test

CO Ocular Motility Evaluation & Binocular Vision Assessment 2