The Certified Ophthalmic Assistant (COA®) credential is the entry-level core certification for ophthalmic assistants, awarded by IJCAHPO (the International Joint Commission on Allied Health Personnel in Ophthalmology). COA holders typically work in ophthalmology practices, taking histories, measuring vision and eye pressure, and assisting the ophthalmologist. COT® and COMT® are the next core levels.
Searching for “COA”? This page is about the ophthalmic COA from IJCAHPO — not other credentials that share the same abbreviation.
Eligibility: three pathways
You need to meet one of these pathways. Every route involves either an accredited program or supervised work under an ophthalmologist.
| Pathway | Education | Work experience |
|---|---|---|
| COA-A1 | Graduate of an ICA-accredited ophthalmic program at the Clinical Assistant level If more than 12 months have passed since graduation, continuing education is required (18 IJCAHPO credits per year since, earned within the prior 36 months). |
None required |
| COA-A2 | Graduate of an ICA-accredited Non-Clinical Assistant program (distance learning included) The same continuing-education rule applies after 12 months. |
500 hours working under an ophthalmologist within the prior 12 months |
| COA-A3 | High school diploma or equivalent plus an approved independent study course (the JCAT or the AAO Ophthalmic Medical Assisting course) If the course was completed more than 36 months ago, it must be repeated or continuing education is required. |
1,000 hours working under an ophthalmologist within the prior 12 months |
Students in accredited programs may apply up to 2 months before graduation, and a special-consideration route exists (for example, for candidates trained outside the U.S.). See IJCAHPO’s Core Criteria Handbook for the exact rules.
Exam format and process
- Confirm your pathway and gather documentation.
- Apply online or by mail with the fee. Application processing typically 2–4 weeks (rush processing available for a fee).
- Schedule at Pearson VUE after you receive your confirmation. Schedule within a 90-day eligibility window (one 30-day extension available for a fee).
- Test: 200 multiple-choice questions in 180 minutes. Computer-based at Pearson VUE test centers.
- Results: Unofficial pass/fail on screen with a performance report; official results by mail in 2–4 weeks. Passing score set by the modified Angoff method; numeric scores are not released.
IJCAHPO also offers a COA practice examination route: you pay $150 to sit for it, and if you pass you can pay another $150 within 30 days to become certified. Remote (online) proctoring availability isn't confirmed — check with IJCAHPO.
Fees
| Item | Fee |
|---|---|
| COA initial application | $300 |
| First retest / second retest | $250 / $150 |
| COA practice examination route | $150 to sit; another $150 within 30 days if you pass |
| Rush processing | $50 |
| Eligibility extension (30 days) | $50 |
| Recertification | $125 |
The 22 content areas
IJCAHPO’s COA content outline (effective August 1, 2025) weights 22 areas. Sorted from largest to smallest:
| Content area | Weight |
|---|---|
| History & Documentation | 9% |
| Ophthalmic Patient Services & Education | 8% |
| General Medical Knowledge | 8% |
| Visual Assessment | 7% |
| Pupil Assessment | 7% |
| Tonometry | 7% |
| Visual Field Testing | 6% |
| Pharmacology | 6% |
| Refraction | 5% |
| Ophthalmic Imaging | 5% |
| Medical Ethics, Legal & Regulatory | 4% |
| Ocular Motility Testing | 4% |
| Lensometry | 3% |
| Biometry | 3% |
| Supplemental Testing | 3% |
| Surgical Assisting | 3% |
| Keratometry | 2% |
| Diagnostic Ultrasound | 2% |
| Microbiology | 2% |
| Optics & Spectacles | 2% |
| Contact Lenses | 2% |
| Equipment Maintenance & Repair | 2% |
History & documentation, patient services & education, general medical knowledge, and the core measurement skills (visual assessment, pupils, tonometry) carry the most weight. Small areas still add up: the ten areas weighted at 2–3% each account for 24% of the exam.
How to prepare
For a step-by-step plan weighted by the official content areas, read how to study for the COA exam.
- Download IJCAHPO’s content-area document and check off each area as you study it.
- Practice skills at work — under your supervising ophthalmologist’s direction — so the clinical questions feel familiar.
- Try our free COA sample quiz, and use keratometry and transposition guides for the optics topics.
- IJCAHPO sells official study materials, including a COA study guide and the JCAT independent study package, and runs certification exam prep sessions.
Recertification
COA certification is valid for 36 months. Recertify with 18 IJCAHPO credits per 36-month cycle (or by re-examination); the fee is $125 (application signed by a sponsoring ophthalmologist). See IJCAHPO’s recertification page for which credits count.
Common questions
Answered with official sources on our FAQ pages:
Official sources
- IJCAHPO — Certified Ophthalmic Assistant (COA) (opens in a new tab)
- IJCAHPO — Core Criteria Handbook (PDF) (opens in a new tab)
- IJCAHPO — COA exam content areas, effective 8/1/2025 (PDF) (opens in a new tab)
- IJCAHPO — Fee schedule and timelines, dated Feb 2025 (PDF) (opens in a new tab)
- IJCAHPO — Recertification (opens in a new tab)
- IJCAHPO — Certification FAQs (opens in a new tab)
- Pearson VUE — IJCAHPO (opens in a new tab)
Last reviewed . Requirements, fees, and dates change — always confirm with the official source before you register or apply.