COA Practice Test

The COA exam is administered by JCAHPO and validates your knowledge across 22 weighted content areas of ophthalmic assisting. Passing this test is mandatory for earning the COA certification, which opens doors to higher pay and advanced roles in ophthalmology practices. Allied health professionals may also find our CNA practice test helpful for career development.

If you are searching for a COA exam practice test, start with the free questions on this page: every answer comes with an explanation, and regular COA test practice with the question sets below, plus the study notes, covers the COA exam topics in order.

How to Use a COA Exam Practice Test the Way the Real Exam Is Scored

The real COA exam gives you 200 multiple-choice questions in 180 minutes, so a full-length COA exam practice test should be taken in one sitting with a timer set to 3 hours. That works out to 54 seconds per question; if you regularly need more than a minute, flag the item, move on, and return to it at the end rather than losing time you need for the heavily weighted sections.

Weight your COA test practice the way IJCAHPO weights the outline. Under the content outline in force since August 1, 2025, History and Documentation carries 9% of the exam, Ophthalmic Patient Services and Education and General Medical Knowledge 8% each, and Visual Assessment, Pupil Assessment and Tonometry 7% each. Those six areas together account for nearly half of your 200 questions, so they deserve the first and last review sessions. Areas weighted at 2%, such as Keratometry, Contact Lenses and Equipment Maintenance, still appear, but each contributes only about four questions.

IJCAHPO does not release a numeric score; you receive a pass/fail Performance Report broken down by content area. Mirror that on your own practice runs: record your percentage per topic, not just the overall total, and retest any area that sits below your average. IJCAHPO also sells an optional official COA Practice Examination for $150, which is worth taking once you are consistently scoring well on free question sets, because a passing result on it can be converted into certification for a further $150.

Budget for the $300 IJCAHPO exam fee for your initial COA certification, plus whatever you spend on study materials (the optional official COA Practice Examination is $150; free question sets on this page cost nothing). Many employers may reimburse these costs. Allied health professionals may also find our CNA practice test helpful for career development.

Ready to Pass Your COA Exam?

Join thousands of successful ophthalmic assistants who used our free practice tests to ace their JCAHPO certification. If you have been drilling a Quizlet COA practice test deck, add a timed COA exam practice test here to check pacing under real conditions. Start practicing now!

Ensure you earn your 18 IJCAHPO CE credits (at least 12 from IJCAHPO-approved courses) well before your cycle ends. AMA/CMA Category 1 CME is not accepted for COA renewal. Late renewal incurs an $85 late fee and, after the grace period, requires re-examination.

Pros and Cons at a Glance

Sample COA - Certified Ophthalmic Assistant Practice Questions

Try these questions from our free COA - Certified Ophthalmic Assistant practice tests. The correct answer and an explanation follow each question.

1. The Titmus stereo test (Stereo Fly Test) is used to evaluate a patient's depth perception. This test assesses which of the following visual functions?

   • A. Color perception
   • B. Contrast sensitivity
   • C. Stereopsis
   • D. Peripheral vision

Answer: C. Stereopsis

Stereopsis is the term for three-dimensional vision or depth perception, which is the ability to perceive the world in 3D and judge the distance of objects. The Titmus stereo test, which includes the well-known stereo fly, animal figures, and Wirt circles, uses polarized glasses to present slightly different images to each eye (binocular disparity) to measure a patient's level of stereopsis.

Answer: C. Esophoria

A phoria is a latent deviation that is only present when binocular vision is interrupted, such as by covering an eye. Since the eye was turned inward (eso-) under the cover and moves outward to fixate when uncovered, this indicates an esophoria. A tropia is a manifest deviation that is always present.

Answer: A. The test cannot be used to measure both vertical and horizontal photos at a distance and near.

Explanation: The Mallett unit (MA) is used to quantify the magnitude and direction of phorias in both vertical and horizontal planes at distance and near. Therefore, option A is incorrect; the test can be used to measure both vertical and horizontal phorias at a distance and near.

Answer: D. A right afferent pupillary defect (APD)

The swinging flashlight test is used to detect a relative afferent pupillary defect (RAPD or APD), also known as a Marcus Gunn pupil. This defect indicates a problem with the afferent pathway (optic nerve). When light is swung from the normal eye to the affected eye, the affected pupil receives a weaker signal to constrict and will paradoxically dilate.

Take the full COA - Certified Ophthalmic Assistant practice test

Official Resources

• IJCAHPO Certified Ophthalmic Assistant (COA) page explains the three eligibility pathways, the application process and the Pearson VUE scheduling steps.
• IJCAHPO COA exam content outline (PDF) lists all 22 weighted content areas and the skills tested under each.
• IJCAHPO recertification page covers the 36-month cycle, the 18 continuing education credits required for COA renewal and the retest-in-lieu-of-CE option.