COT Ocular Motility Testing 5

Question 1

Brown syndrome is caused by:

Accepted Answer

Restriction of the superior oblique tendon sheath

Answer

Brown syndrome results from a tight or restricted superior oblique tendon sheath, limiting passive and active elevation in adduction.

Question 2

Internuclear ophthalmoplegia (INO) is caused by a lesion in which structure?

Accepted Answer

Medial longitudinal fasciculus

Answer

INO results from a lesion in the medial longitudinal fasciculus (MLF), disrupting conjugate horizontal gaze coordination between the abducens and contralateral oculomotor nuclei.

Question 3

During near point of convergence (NPC) testing, a receded NPC (beyond 10 cm) is associated with:

Accepted Answer

Convergence insufficiency

Answer

A receded NPC beyond approximately 6–10 cm is the hallmark objective finding in convergence insufficiency.

Question 4

The Bagolini striated lens test is used to evaluate:

Accepted Answer

Binocular status under near-natural conditions

Answer

Bagolini striated lenses minimally disrupt binocular vision, allowing assessment of fusion, suppression, and anomalous retinal correspondence under near-natural viewing conditions.

Question 5

In the prism and alternate cover (PACT) test, what does the total deviation measured represent?

Accepted Answer

The total deviation including both phoria and tropia

Answer

The PACT disrupts fusion completely, measuring the total deviation which includes both the manifest (tropia) and latent (phoria) components.

COT - Certified Ophthalmic Technician Practice Test

COT - Certified Ophthalmic Technician Practice Test

COT Ocular Motility Testing 5