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Free COA Practice Test

Pass the IJCAHPO Certified Ophthalmic Assistant exam with confidence.

Start with a free COA practice test and build exam-ready confidence for the IJCAHPO Certified Ophthalmic Assistant exam.

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1000+COA Questions
22Exam Domains
10Free Questions
2026Updated
What you get

Everything your COA certification prep needs

Practice expert-vetted questions, find your weak domains, and turn every mistake into a focused review plan.

Expert-vetted questions

Every question is reviewed by an experienced COA professional for clarity, accuracy and practical exam relevance.

See what to study next

Domain analytics show which parts of the exam blueprint are holding you back.

Turn mistakes into confidence

Missed questions become a review list, so nervous guessing turns into focused repetition.

1,000+ exam-realistic questions
All 22 COA domains
Weighted to the exam blueprint
Clear answer explanations
Updated for the 2026 exam
Instant, one-time access
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Your exam readiness

Track your readiness, domain strengths, and recent results at a glance.

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Domain performance
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Study by domain

Practice the COA exam by domain

1. History and Documentation

9% of the exam

Identify weak areas and improve with focused review.

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2. Visual Assessment

7% of the exam

Identify weak areas and improve with focused review.

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3. Visual Field Testing

6% of the exam

Identify weak areas and improve with focused review.

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4. Pupil Assessment

7% of the exam

Identify weak areas and improve with focused review.

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5. Tonometry

7% of the exam

Identify weak areas and improve with focused review.

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6. Keratometry

2% of the exam

Identify weak areas and improve with focused review.

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7. Lensometry

3% of the exam

Identify weak areas and improve with focused review.

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8. Biometry

3% of the exam

Identify weak areas and improve with focused review.

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9. Diagnostic Ultrasound

2% of the exam

Identify weak areas and improve with focused review.

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10. Supplemental Testing

3% of the exam

Identify weak areas and improve with focused review.

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11. Microbiology

2% of the exam

Identify weak areas and improve with focused review.

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12. Pharmacology

6% of the exam

Identify weak areas and improve with focused review.

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13. Surgical Assisting

3% of the exam

Identify weak areas and improve with focused review.

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14. Ophthalmic Patient Services and Education

8% of the exam

Identify weak areas and improve with focused review.

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15. Optics and Spectacles

2% of the exam

Identify weak areas and improve with focused review.

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16. Contact Lenses

2% of the exam

Identify weak areas and improve with focused review.

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17. Equipment Maintenance and Repair

2% of the exam

Identify weak areas and improve with focused review.

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18. Medical Ethics, Legal, and Regulatory Issues

4% of the exam

Identify weak areas and improve with focused review.

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19. General Medical Knowledge

8% of the exam

Identify weak areas and improve with focused review.

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20. Refraction

5% of the exam

Identify weak areas and improve with focused review.

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21. Ophthalmic Imaging

5% of the exam

Identify weak areas and improve with focused review.

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22. Ocular Motility Testing

4% of the exam

Identify weak areas and improve with focused review.

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Built for practice, not passive reading Active recall and repetition build real exam-day readiness.
Written to match the real exam Every question mirrors the style, difficulty, and phrasing of the actual COA exam.
Aligned to the COA blueprint Weighted across every exam domain, so you practice exactly what's tested.
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Before you decide

Frequently asked questions

Straight answers about the COA exam, the questions, pricing, the free trial, and how this fits your prep.

The COA exam spans 22 domains - History and Documentation (9%), Visual Assessment (7%), Visual Field Testing (6%), Pupil Assessment (7%), Tonometry (7%), Keratometry (2%), Lensometry (3%), Biometry (3%), Diagnostic Ultrasound (2%), Supplemental Testing (3%), Microbiology (2%), Pharmacology (6%), Surgical Assisting (3%), Ophthalmic Patient Services and Education (8%), Optics and Spectacles (2%), Contact Lenses (2%), Equipment Maintenance and Repair (2%), Medical Ethics, Legal, and Regulatory Issues (4%), General Medical Knowledge (8%), Refraction (5%), Ophthalmic Imaging (5%), and Ocular Motility Testing (4%). Every practice question maps to one of them, so you train on exactly what's tested.

No - and that matters. These are original practice questions written to mirror the style, difficulty, and domain coverage of the COA exam blueprint. We never distribute actual exam content, so practicing here keeps you fully compliant with official exam policies.

No. COA Exam Prep is an independent study resource for IJCAHPO Certified Ophthalmic Assistant (COA). It is not affiliated with, sponsored by, or endorsed by the official certifying body or exam administrator.

What candidates say

Trusted by COA candidates

Real feedback from COA candidates on Reddit.

★★★★★
Sourced from Reddit

"wasnt sure this site would be worth it tbh but the practice questions for tonometry specifically were really solid. ended up passing first try. quiet relief is the right way to put it."

r/Ophthalmology Posted on Reddit
★★★★★
Sourced from Reddit

"i procrastinated for like two months and then crammed with coaexam.com in the last few weeks. what actually helped was how it broke down my weak areas after each practice set so i wasnt just randomly reviewing everything. pharmacology was where i kept losing points and being able to focus there made a real difference."

r/Ophthalmology Posted on Reddit
★★★★★
Sourced from Reddit

"the mistake review feature is what got me through. i definately would have bombed ocular motility without it. does what it says."

r/Ophthalmology Posted on Reddit

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