AOC Patient Assessment and Evaluation 3

Question 1

What is the primary purpose of performing a cycloplegic refraction in children compared to a manifest refraction?

Accepted Answer

To eliminate the effect of accommodation on the refractive measurement

Answer

Cycloplegia paralyzes the ciliary muscle, preventing accommodation and revealing the full latent hyperopia that would otherwise be masked.

Question 2

A 7-year-old presents with a right esotropia. The alternate cover test shows a greater deviation than the unilateral cover test. This difference indicates the presence of:

Accepted Answer

Fusional convergence controlling part of the deviation

Answer

The difference between the alternate cover test (total deviation) and the unilateral cover test (manifest deviation) reflects the amount of fusional vergence holding the eyes aligned.

Question 3

In assessing a child for amblyopia, the crowding phenomenon refers to:

Accepted Answer

Reduced visual acuity when targets are surrounded by contours

Answer

Crowding phenomenon in amblyopia describes reduced visual acuity when optotypes are surrounded by closely spaced contours, making line acuity worse than single-letter acuity.

Question 4

The Randot Preschool Stereoacuity test is preferred over the Titmus fly test for young children primarily because:

Accepted Answer

It eliminates monocular cues that allow guessing

Answer

The Randot test uses random-dot patterns that eliminate monocular contour cues, providing a purer measure of stereopsis compared to the contour-based Titmus fly.

Question 5

During sensorimotor evaluation, the Maddox rod test is MOST useful for measuring:

Accepted Answer

Phoria by dissociating binocular fusion

Answer

The Maddox rod dissociates the eyes by converting one eye's point light source into a streak, allowing measurement of the underlying phoria.

(AOC) American Orthoptic Council Practice Test

(AOC) American Orthoptic Council Practice Test

AOC Patient Assessment and Evaluation 3