CVT Gaze Stabilization & Oculomotor Assessment 2

Question 1

Dynamic visual acuity (DVA) testing measures:

Accepted Answer

The change in visual acuity between static conditions and during active head movement

Answer

Visual acuity at rest with best optical correction

Answer

Visual field defects caused by vestibular disorders

Answer

Contrast sensitivity during optokinetic stimulation

Question 2

Normal VOR gain during sinusoidal rotational chair testing is approximately:

Accepted Answer

0.8–1.0

Answer

0.3–0.5

Answer

0.6–0.7

Answer

1.2–1.5

Question 3

Covert saccades detected on vHIT are best described as:

Accepted Answer

Saccades that occur during the head impulse before the head stops moving

Answer

Saccades that occur after the head has completed its movement

Answer

Saccades directed away from the visual target

Answer

Saccades observed only in central vestibular disorders

Question 4

The smooth pursuit eye movement system is best tested at which frequency range?

Accepted Answer

0.5–2 Hz

Answer

5–10 Hz

Answer

0.1–0.4 Hz

Answer

10–20 Hz

Question 5

Which oculomotor finding most strongly suggests a central vestibular lesion rather than a peripheral one?

Accepted Answer

Direction-changing nystagmus that reverses with the direction of gaze

Answer

Unidirectional horizontal nystagmus suppressed by fixation

Answer

Spontaneous nystagmus that decreases with visual fixation

Answer

Reduced VOR gain ipsilateral to hearing loss

Question 6

The optokinetic nystagmus (OKN) response is generated by which combination of eye movement systems?

Accepted Answer

Both smooth pursuit and saccadic systems working together

Answer

Saccadic system only

Answer

Smooth pursuit system only

Answer

VOR system exclusively

Question 7

During fixation suppression of the VOR (VVOR), failure to suppress the VOR suggests:

Accepted Answer

Cerebellar or central nervous system pathology

Answer

Peripheral vestibular hypofunction on the tested side

Answer

Normal central vestibular processing

Answer

Bilateral otolith organ dysfunction