AOC Study Guide 2026
Everything you need to pass the AOC exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 AOC Exam Format at a Glance
📚 AOC Topics to Study (75)
✍️ Sample AOC Questions & Answers
1. What does the documentation 'VA: 20/400 PL+' indicate about a patient's vision?
PL+ (projection of light positive) means the patient cannot identify the Snellen chart but can accurately point to the direction of a light source, indicating some functional vision.
2. When measuring fusional vergence amplitudes, the base-out prism break point tests which vergence mechanism?
Base-out prisms induce an exo demand that requires convergence to maintain fusion, thus measuring positive fusional vergence.
3. The measurement of the refractive error in which the two principal meridians have different powers is called:
Astigmatism results from an asymmetric cornea or lens where different meridians have different focal points, producing a blurred image.
4. A record entry states 'fusion range: BO 6PD to 20PD'. What does 'BO' indicate?
BO stands for base-out prism, which is used to measure convergence fusional amplitudes by creating a divergence demand on the visual system.
5. The Snellen chart tests which aspect of visual function?
The Snellen chart is the standard tool for measuring distance visual acuity, expressed as a fraction (e.g., 20/20).
6. The Bielschowsky head tilt test is used to differentiate superior oblique palsy from which other condition?
The Bielschowsky head tilt test helps distinguish superior oblique palsy (showing hypertropia that worsens on ipsilateral head tilt) from a skew deviation.