CO Passing Score 2026: Exactly What You Need to Pass

What the Issuer Actually Publishes About Scoring

If you searched for "CO passing score" hoping for a clean number like "you need X percent," here is the honest answer up front: the American Orthoptic Council has not published a numerical passing threshold in the public materials we reviewed. That is not a gap in this article; it is the current state of the public record for the Certified Orthoptist credential.

What the AOC does state publicly is the structure of the pathway. Accredited orthoptic training is followed by written and oral board certification examinations. Those two sentences are the foundation of everything you can responsibly say about how candidates are evaluated. Anything beyond that, such as a scaled-score range, a fixed percentage correct or a published pass rate, would be speculation unless it comes from the AOC itself.

For a broader look at what we can and cannot say about outcomes, see our companion piece on the CO pass rate and what the data shows.

Details We Cannot Verify (and Why That Matters)

Several details that candidates commonly ask about were not verified from official, public sources. Treating them as unknown is safer than guessing. Here is the status of each:

The most important row for passing-score thinking is the one about format. Practice question banks, including ours, are written in an editorial format designed for supplemental learning. That format should never be read as a description of how the live written examination is delivered. If you build your expectations around a practice format, you risk being surprised on test day.

Cost questions come up often alongside scoring questions. Because no universal AOC examination fee was verified, our CO certification cost breakdown focuses on what can be said responsibly, including the fact that tuition varies by training program.

The Written and Oral Structure of Board Certification

The AOC describes certification as involving both written and oral board examinations. This matters for how you think about "passing." In a two-part process, your overall result depends on demonstrating competence in more than one modality. A candidate who is strong on written recall but weaker in applied clinical reasoning may find the oral portion more demanding, and the reverse can also be true.

We deliberately avoid describing the oral stage in granular detail, because its exact conduct, duration and scoring are not published in the sources we reviewed. What you can do is prepare the underlying competencies thoroughly, which serves you whatever the precise format.

What Your Preparation Should Cover

The AOC's public description of fellowship course subjects lists eleven areas. We reproduce them here as the framework for preparation. To be clear, these are public issuer training subjects used for supplemental knowledge preparation. They are not verified scored examination domains, they carry no confirmed weights, and they should not be treated as the complete examination syllabus. Our complete guide to all 11 CO content areas expands on each one.

The Two Documents the AOC Says Underpin the Exams

The AOC publications page states that the 2024 Syllabus of Orthoptic Instruction and Core Competencies: Essential Skills for Orthoptists form the basis of the certifying examinations. These are separate documents with different jobs: the syllabus covers didactic information, while the core competencies document covers clinical skills.

Their listed prices are 150 dollars and 35 dollars respectively. These are publication prices, not examination fees, and it is worth keeping that distinction clear so nobody confuses a document purchase with the cost of sitting for certification.

One caveat we want to be transparent about: we did not inspect the complete contents of either paid document. The public course description of eleven subjects is not an equivalent substitute for the full syllabus. If you want the closest thing to an authoritative blueprint of what the certifying examinations are built on, those publications are the primary source. Our own materials are supplemental.

Training Path: Where the Exam Sits in the 24 Months

Certification does not stand alone. It follows accredited training, and the training structure shapes how you should think about readiness.

• The published standard training program is 24 months, combining didactics with clinical training across ages under a certified orthoptist or ophthalmologist.
• Admission normally requires a bachelor's degree, with program-specific prerequisites.
• Advanced standing may be considered for qualifying COT or COMT holders with an undergraduate degree, but it requires at least 12 months in an accredited program and program-director approval or a readiness review.
• International eligibility is evaluated separately, and automatic transfer should never be assumed.

These are training periods, never examination timers. A common point of confusion is reading "24 months" or "12 months" as something to do with exam duration. It is not. For the full qualification picture, including prerequisites, see our guide to CO requirements, eligibility and how to qualify.

Scheduling questions follow a similar pattern: specific testing windows and booking mechanics were not verified from the sources we reviewed, so rather than guess, we point you to the AOC directly. Our page on CO exam dates and scheduling explains what is and is not confirmed.

Passing Score Myths to Discard

Myth: "There is a universal percentage you must hit"

No public source we reviewed confirms one. Exams can be scored in ways that are not a simple percentage of correct answers, and without an AOC statement, any figure is a guess.

Myth: "The practice question format is the real exam format"

Editorial practice questions are a study aid. They do not tell you the live written format, item count or timing. Do not infer a multiple-choice live format from them.

Myth: "A strong written score guarantees certification"

The AOC describes both written and oral board examinations. Strength in one stage does not substitute for the other, and a question bank is explicitly not a replacement for supervised clinical education or oral and practical skill assessment.

Myth: "More practice questions means a higher score"

Volume alone does not help if you are not closing knowledge gaps. Review the explanation for every question you miss, then return to the underlying subject. Our overview of how hard the CO exam is discusses why difficulty is better judged by your own gaps than by anyone's reported average.

A Domain-Ordered Preparation Plan

Because the eleven areas build on one another, sequence matters more than raw hours. This is the single study-method section in this article, and it is tied to CO content: foundations first, then application, then integration.

Optics is placed early on purpose: it relies on algebra and physics, and calculation fluency takes repetition. Anatomy and neuro-anatomy come first because later subjects, from ocular motor disorders to surgical principles, assume you can place structures and pathways. For a fuller blueprint, our CO study guide goes deeper on pacing and review, and you can drill each area with the practice questions on our main practice test site.

After You Pass: Active Certification and Continuing Education

Earning the credential is a milestone, not the finish line. The AOC's home page currently recognizes newly certified orthoptists in 2026, which supports the credential as active and awarded. Continuing education is required after certification, though the exact current renewal fees and cycle were not verified in this source review, so confirm the details directly with the AOC.

It also helps to keep the professional scope in view. The credential is not independent physician or prescribing authority. Orthoptists work within a supervising clinical context, and the same is true of how exam scenarios are framed: a good answer respects the orthoptist role rather than reaching beyond it.

If you are weighing whether the effort pays off, read our analysis of whether the CO certification is worth it. Passing-score anxiety is easier to manage when you have a clear view of the career on the other side.

Frequently Asked Questions