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COT exam review-Ocular Motility| Questions with 100% Solutions
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COT exam review-Ocular Motility|Questions with 100% Solutions
The gaze most affected by LR palsy is: - ✔✔Abduction
The gaze most affect by SO palsy is: - ✔✔Down and in
A common deviation found following head trauma is: - ✔✔Bilateral SO palsy
The Bielschowsky 3-step test is used in vertical deviations to: - ✔✔Identify which cyclovertical muscle
is at fault.
The Bielschowsky 3-step test will be accurate in which case?
a.) After a LR recession
b.) A long-standing muscle palsy
c.) A recent onset of muscle-palsy
d.) An orbital floor fracture. - ✔✔c.) A recent onset of muscle palsy
Step 1 of the B3ST involves: - ✔✔Determining which eye is hypertropic in primary position.
Step 2 of the B3ST involves: - ✔✔Determining if the hupertropia is worse in left of right gaze.
Step 3 of the B3ST involves: - ✔✔Determining if the hypertropia is worse in left head tilt or right.
Which muscle is weak in the following B3ST example?
1.) RHT
,2.) Worse in right gaze
3.) Worse in left tilt - ✔✔RIR
The lay term for amblyopia is: - ✔✔Lazy eye.
Amblyopia may be manifested as: - ✔✔Poor vision in an otherwise healthy eye that cannot
be improved with lenses.
Which of the following is most likely to develop amblyopia in the right eye?
a.) 3-year-old with refractive error of -3.00 OD and +0.50 OS
b.) 3-year-old with refractive error of +4.00 OD and +1.25 OS
c.) 12-year-old with convergence insufficiency exodeviation
d.) 1-year-old with 1mm ptosis OD. - ✔✔B. Hyperopic anisometropia isat a high risk for amblyopia
because the brain will only accommodate enough to correct the better eye, leaving the other blurred.
All of the following can cause amblyopia except:
a.) Congential ptosis
b.) Alternating strabismus
c.) Congenital cataract
d.) Anisometropia - ✔✔B. Kids who alternate are using both eyes.
Clinically amblyopia is diagnosed when the: - ✔✔Best corrected vision in each eye differs by two
or more acuity lines.
Which of the following is appropriate when testing a preschooler for amblyopia?
a.) Single Allen cards
b.) Isolated projected figures
c.) A full line of figures
, d.) Single E's - ✔✔A full line of figures. Amblyopic eyes ca identify figures more easily if they are
isolated than if they are presented in a line (crowding phenomenon). Accurate vision can be obtained by
using a row of age-appropriate figures.
A three-month-old may be tested for amblyopia by any of the following except:
a.) 25Δ base in test
b.) Rating central, steady, and maintained.
c.) Preferential looking technique
d.) Visual evoked potential - ✔✔B. Central, steady, and maintained isn't a really accurate test.
The purpose of covering one eye with an occluder for strabismus testing is to: - ✔✔Disrupt
fusion. Fusion will hold a phoria or an intermittent deviation in check, so disrupting it can cause
these deviations to manifest.
Cover testing can even be performed on an infant because: - ✔✔It is objective.
Cover testing can be used on all patients except for: - ✔✔Monocular patients.
The cover/uncover test is used to determine the presence of: - ✔✔A phoria versus a tropia.
The cover/uncover test can also reveal the presence of: - ✔✔The direction- Eso vs. exo deviations.
You have covered the patient's right eye. When you uncover it, the right eye moves inward. Now you
cover the left eye. When you uncover it, the left eye moves inward. You deduce the patient has a: -
✔✔Exodeviation. The eye drifts out when fusion is disrupted and jerks back in once the target is seen.
The patient's vision is 20/20 OU. You cover the patient's right eye and notethat when you do the left
eye moves outward. When you uncover the right eye, neither eye moves. When you cover the left eye,
the right eye moves outward. With you uncover the left eye, neither moves. This indicates: - ✔✔An
alternating esotropia.
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