About COA Exam Prep
An independent practice platform for the IJCAHPO Certified Ophthalmic Assistant (COA) exam - real questions across every exam domain, each with a plain-language explanation.
What's on the COA exam
The IJCAHPO Certified Ophthalmic Assistant (COA) exam is organized into 22 knowledge domains. Each domain makes up a different share of the exam, so the most efficient way to prepare is to know where the weight sits and practice accordingly:
- History and Documentation9% of the exam
- Visual Assessment7% of the exam
- Visual Field Testing6% of the exam
- Pupil Assessment7% of the exam
- Tonometry7% of the exam
- Keratometry2% of the exam
- Lensometry3% of the exam
- Biometry3% of the exam
- Diagnostic Ultrasound2% of the exam
- Supplemental Testing3% of the exam
- Microbiology2% of the exam
- Pharmacology6% of the exam
- Surgical Assisting3% of the exam
- Ophthalmic Patient Services and Education8% of the exam
- Optics and Spectacles2% of the exam
- Contact Lenses2% of the exam
- Equipment Maintenance and Repair2% of the exam
- Medical Ethics, Legal, and Regulatory Issues4% of the exam
- General Medical Knowledge8% of the exam
- Refraction5% of the exam
- Ophthalmic Imaging5% of the exam
- Ocular Motility Testing4% of the exam
Every practice question on this site is organized across these 22 domains, so your study tracks the real exam structure instead of guesswork. As you answer, the per-domain analytics surface the areas still costing you points, so your review goes where it moves your score.
What we believe good exam prep looks like
Realistic practice beats passive reading. Every question is written to mirror the style and difficulty of the real exam, with a clear explanation of why the right answer is right and the others aren't.
Your weak spots should find you. Domain analytics, mistake review, and re-drilling are built in, so study time goes where it moves your score.
Pricing should be simple. One payment for a fixed access window matched to your exam date. No subscription, no auto-renewal, and 10 free questions to try before you spend anything.
Get in touch
Questions, feedback, or something not working? Email support@boardmentor.study - candidate messages are read and answered.