AOC Patient Assessment and Evaluation 2

Question 1

When performing the Hirschberg corneal reflex test, a reflex displaced 1 mm temporal to center on the right eye corresponds to approximately how many prism diopters of esotropia?

Accepted Answer

15 prism diopters

Answer

Each 1 mm of corneal reflex displacement corresponds to approximately 15 prism diopters of deviation.

Question 2

Which test best differentiates a true fusion response from monocular cues in a patient with suspected monofixation syndrome?

Accepted Answer

4-prism diopter base-out test

Answer

The 4 prism diopter base-out test detects the small scotoma characteristic of monofixation syndrome by assessing whether the eye makes a fusional vergence movement.

Question 3

A child's cycloplegic refraction shows +4.00 D OD and +0.50 D OS. This significant anisometropia places the child at risk primarily for:

Accepted Answer

Anisometropic amblyopia

Answer

Anisometropia of 1.50 D or more is a leading cause of amblyopia due to unequal retinal image quality between the two eyes.

Question 4

During a sensory evaluation, a patient with longstanding esotropia reports diplopia only after the deviation is surgically corrected. This phenomenon is best described as:

Accepted Answer

Paradoxical diplopia

Answer

Paradoxical diplopia occurs after strabismus surgery when a patient who previously suppressed suddenly experiences diplopia because the sensory adaptation has not resolved.

Question 5

The Lancaster red-green test is most useful in assessing patients with:

Accepted Answer

Incomitant strabismus with normal retinal correspondence

Answer

The Lancaster test requires normal retinal correspondence and is ideal for incomitant deviations such as paralytic strabismus, plotting the field of binocular single vision.

(AOC) American Orthoptic Council Practice Test

(AOC) American Orthoptic Council Practice Test

AOC Patient Assessment and Evaluation 2