Ocular Motility Testing Flashcards
7 cards from real COT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Ocular Motility Testing flashcards as text
Which cranial nerve innervates the superior oblique muscle?
Answer: CN IV
The trochlear nerve (cranial nerve IV) is the sole innervator of the superior oblique muscle.
A Krimsky test uses prisms in which of the following ways?
Answer: Over the fixing eye to center the light reflex in the deviating eye
The Krimsky test places prism over the fixing eye until the corneal reflex centers in the deviating eye, neutralizing the deviation.
When performing versions, which movement is described as both eyes rotating to the right?
Answer: Dextroversion
Dextroversion is a conjugate movement of both eyes to the right.
Which test is most useful for detecting small vertical deviations and cyclotropia simultaneously?
Answer: Double Maddox rod test
The double Maddox rod test is used to quantify cyclodeviation by having the patient align two perceived lines, one seen by each eye.
Innervation of the inferior oblique muscle is supplied by which branch of the oculomotor nerve?
Answer: Inferior division
The inferior division of CN III innervates the inferior oblique, medial rectus, and inferior rectus muscles.
A patient's left eye drifts up under cover during the cover-uncover test, and returns down when uncovered. This finding indicates:
Answer: Left hyperphoria
A latent upward drift of the left eye that corrects with fusion is called left hyperphoria (a phoria, not a tropia, since it requires cover to disrupt fusion).
The Parks three-step test is specifically designed to identify which type of muscle palsy?
Answer: Cyclovertical muscle palsy
The Parks three-step test systematically isolates which of the eight cyclovertical muscles is paretic by evaluating hyperdeviation in primary gaze, side gaze, and head tilt.