Optician certification in the US means passing the ABO exam (the National Opticianry Competency Examination, or NOCE) for spectacles, the NCLE exam (the Contact Lens Registry Examination, or CLRE) for contact lenses, or both. ABO-NCLE administers them as voluntary credentials, but many states build their optician license on the same exams. Take the ABO exam if you dispense eyeglasses, the NCLE exam if you fit contact lenses, and check your state board before you register, because the state’s rule overrides ABO-NCLE’s.
This guide covers the exams themselves. For state-by-state licensing rules, see our guide to optician license requirements by state. If you are still weighing the job, start with what an optician does day to day.
ABO and NCLE exams compared: Basic, Advanced and Master
ABO-NCLE says it “administers voluntary competency certification examinations for dispensing Opticians and Contact Lens Technicians” and is accredited under ISO/IEC 17024:2012 (ABO-NCLE Basic Exam Handbook, February 2025). There are two entry exams and two Advanced exams, plus a Master designation that is earned by application rather than by exam.
| Credential | Who it is for | Eligibility | Exam format | Fee |
|---|---|---|---|---|
| ABO Basic (NOCE) | Spectacle dispensing | High school diploma, GED or equivalent | 125 multiple-choice questions, 2 hours | $225 |
| NCLE Basic (CLRE) | Contact lens fitting | High school diploma, GED or equivalent | 125 multiple-choice questions, 2 hours | $225 |
| ABO Advanced (ABOAC) | Advanced spectacle dispensing | Basic certification held for one full three-year period, or an opticianry degree plus a passed Basic exam | 125 multiple-choice questions, 3 hours | $225 |
| NCLE Advanced (NCLEAC) | Advanced contact lens fitting | Same as ABO Advanced, using NCLE | 125 multiple-choice questions, 3 hours | $225 |
| ABO Master (ABOM) | Recognition for experienced opticians | Advanced certified for one full three-year cycle, plus published or taught Advanced Level III content | No exam; application reviewed by the ABO Masters Committee | See the application |
All four exams are computer-based and given at Prometric test centers or by ProProctor remote proctoring, and a portion of the 125 questions are unscored pretest items. The Basic and Advanced handbooks list the same $225 fee, and the contact lens equivalent of the Master title is NCLEM. Fees are non-refundable, and moving your exam date, window or location costs $75 (ABO-NCLE Advanced Exam Handbook, August 2024). Fees and handbooks are revised, so confirm the amount on the ABO-NCLE Basic exam page before you pay.
A practical exam also exists. The ABOP is a separate hands-on exam, and ABO-NCLE offers a combined NOCE plus ABOP sitting (NOCOP) of three hours, two for the written section and one for the practical, at $250 (Basic handbook). The practical exams must be taken at a Prometric test center, not by remote proctor (Advanced handbook). Some state boards require the practical, so check yours.
Who can take the exam and how to register
You do not need schooling or an apprenticeship to sit for a Basic exam. The ABO-NCLE Basic page states the requirement as a high school diploma or GED, and adds: “While no prior experience is required, those with 2–3 years of hands-on experience or completion of an optical school program have higher success rates.” Your state board can still require more. The handbook says that if your state licensing board has different regulations, “the state requirement supersedes those of ABO-NCLE.”
Registration works in two steps:
- Create an account on abo-ncle.org, register for the exam and pay by credit card. Only the candidate can register.
- Wait 24 to 48 hours, then use the scheduling link in your confirmation email to book a Prometric test center or a ProProctor remote slot.
The exams run in four testing windows a year (January to March, April to June, July to September, October to December). Registration closes about two weeks before a window ends and late registrations are not accepted, so check the current dates on the exam page. Bring government-issued photo ID that matches your registration name. Candidates with documented disabilities submit the special testing accommodations form with their registration.
If you do not pass, the handbook allows a retake after 14 days. You get three attempts, and after the third unsuccessful attempt you must wait 90 days.
What is on the ABO and NCLE exams
The Basic handbook publishes a full content outline, and the first thing to know is how heavily the ABO exam leans on optics. The 100 scored NOCE questions split across six domains:
| NOCE Basic domain | Scored questions |
|---|---|
| Ophthalmic Optics | 25 |
| Ophthalmic Products | 20 |
| Dispensing Procedures | 20 |
| Instrumentation | 15 |
| Ocular Anatomy, Physiology, Pathology, and Refraction | 10 |
| Laws, Regulations, and Standards | 10 |
The Ophthalmic Optics domain lists daily bench work: transposing a prescription, spotting irregularities such as missing or opposite signs, calculating prismatic effects with Prentice’s rule, applying vertex compensation, and neutralizing lenses. If those feel rusty, the free transposition calculator and vertex distance calculator let you check your hand work. They are practice aids, not exam-prep products. Lens verification and the standards domain are where the ANSI lens tolerance checker helps.
The Instrumentation and Dispensing Procedures domains cover the hands-on side. The outline names focimeters and lensmeters, lens clocks and calipers, corneal reflex pupilometers, distometers and “digital measurement system” under instrumentation, and lists the fitting triangle, vertex distance, pantoscopic tilt and frame measurements under dispensing. If you want to see what a digital PD and segment height measurement looks like next to the manual tools, try one.
The CLRE has eight domains, and Dispensing and Follow-Up carry the most weight at 20 of 100 questions each. The ABOAC publishes percentages instead: Optics 30%, Ocular Anatomy, Physiology, Pathology, and Refraction 33%, and the remaining four domains 8% to 10% each.
Scoring, results and keeping the credential current
ABO-NCLE exams are criterion-referenced: “a Candidate’s performance on the examination is not compared to that of other Candidates in determining the Candidate’s pass/fail status.” Subject matter experts set the minimum passing score with the Modified Angoff method, and the handbook does not publish it as a percentage.
Results appear on screen when you finish, and an emailed report follows within a couple of hours. The handbook notes that official results can be held back for a review. Passing candidates get a framable certificate in roughly 6 to 8 weeks after the window closes.
ABO-NCLE publishes pass rates on its exam pages. For 2024 they were 64.0% for ABO Basic, 59.0% for NCLE Basic, 52.0% for ABO Advanced and 42.0% for NCLE Advanced (Basic exam page, Advanced exam page). Those are single-year figures, not a guarantee of difficulty for your situation.
Certification lasts three years and is renewed with continuing education credits (CECs) plus a renewal fee. The Basic certification renewal page lists:
| Certification | CECs per renewal | Of which ophthalmic | Renewal fee |
|---|---|---|---|
| ABO | 12 | 6 | $125 |
| NCLE | 18 | 9 | $125 |
| Joint, ABO side | 9 | 5 | $125 |
| Joint, NCLE side | 12 | 6 | $125 |
Courses must be ABO-NCLE approved and carry an assigned course number. If you hold a current opticianry license in a state that requires continuing education, you can submit proof of licensure instead of CECs, and ABO-NCLE lists 18 eligible states on that page. Advanced renewals use the same counts, but the ophthalmic CECs must be level 2 or 3 (Advanced renewal page). Master designations follow the Advanced renewal rules.
Renewals are due on the expiration date, and ABO-NCLE “cannot backdate” a gap. The handbook adds that there is “only a 90-day grace period” after expiry. A lapsed credential can be reinstated, but the procedure depends on your state and your continuing education history, so read the reinstatement policy on abo-ncle.org.
Do you need optician certification?
It depends on where you work. The full state list lives in our license guide.
| Where you work | Is certification required? | Why people take it anyway |
|---|---|---|
| A licensing state that uses the ABO and NCLE exams | Usually yes, as an exam step toward the license | The license depends on it |
| A licensing state with its own exams (New Jersey and Virginia, per our license guide) | Not for the license | Portability if you move, employer preference |
| A state with no optician license (28 states and DC) | No | Hiring edge and a portable credential |
Certification is a national credential, while a license is a state permission. The BLS says “employers may require or prefer to hire candidates who have certification in eyeglass dispensing and contact lens dispensing” (BLS Occupational Outlook Handbook: Opticians, Dispensing). Whether certification raises pay is a separate question, and we could not find a credible dollar figure, so see whether certification raises pay for what the data does and does not show. Employers writing a posting can use the optician job description template, which shows how to list ABO and NCLE as required or preferred.
How to prepare for the ABO and NCLE exams
Start with the primary sources, which cost nothing:
- The current handbook. It carries the content outline and, per the exam page, sample questions. Download it from the exam page rather than a third-party copy.
- The official practice exam. The Basic exam page says “A Practice Examination is available for purchase.” This is the closest thing to an official ABO practice test. We do not reproduce exam items, and neither should any course you pay for.
- Your own bench time. The questions test recall and application, so the best preparation is doing the work: reading an eyeglasses prescription, adjusting frames, running a lensmeter calibration, and knowing the eyeglass prescription tolerances.
We do not rank paid prep courses. If you use one, check that it matches the current outline.
Frequently Asked Questions
How much does the ABO exam cost?
The ABO Basic exam costs $225, paid by credit card when you register on abo-ncle.org. The ABO Advanced exam is also $225, and the combined NOCE plus ABOP exam is $250. Fees are non-refundable, and moving your exam date costs $75. Confirm current amounts on the exam page before registering.
What is the pass rate for the ABO exam?
For 2024, ABO-NCLE reports a 64.0% pass rate for the ABO Basic exam and 52.0% for ABO Advanced. The NCLE Basic exam was 59.0% and NCLE Advanced was 42.0%. ABO-NCLE says candidates with 2 to 3 years of hands-on experience or an optical school program have higher success rates.
How long is ABO certification valid?
Three years. To renew, an ABO-certified optician needs 12 ABO/NCLE-approved CECs, 6 of them ophthalmic, plus a $125 fee. If you hold a license in a state that requires continuing education and appears on ABO-NCLE’s eligible list, you can submit proof of licensure instead. There is a 90-day grace period after expiry.
Can you take the ABO exam without going to school?
Yes. Eligibility is a high school diploma, GED or equivalent, and no prior experience is required. ABO-NCLE notes that candidates with 2 to 3 years of hands-on experience or an optical school program have higher success rates. If your state licenses opticians, the board’s requirements still apply on top of the exam.
What is the difference between ABO and NCLE?
ABO covers spectacles and is tested by the NOCE. NCLE covers contact lenses and is tested by the CLRE. They are separate exams and credentials, and you can hold both. The two share the same eligibility rules, fee, length and renewal cycle, but their content outlines differ.
Can you take the ABO exam online?
Yes, for the written exams. The NOCE Basic, ABOAC, CLRE Basic and NCLEAC can be taken at a Prometric test center or through ProProctor remote proctoring. The practical exams (ABOP and NCLEP) must be taken at a test center. For a remote exam you need a compatible computer and network, which Prometric lets you test beforehand.
What is ABOM (ABO Master in Ophthalmic Optics)?
ABOM is a designation for opticians who have held ABO Advanced certification for at least one full three-year cycle and have either two published ABO-approved Advanced Level III articles, two approved Level III courses as an approved speaker, or one of each. There is no exam. The ABO Masters Committee reviews your application.
I grew up inside an optical shop. My mother likes to tell how, as a kid, I would watch eyeglasses being assembled, play with the tools, and draw on the back of service order slips. The family business taught me early what a precise measurement and work done right are worth.
I went on to spend more than twenty years as a software engineer, always keeping an eye on the optical world. Optogrid was born where the two meet: digital measurement technology (pupillary distance and fitting heights) built by someone who knows the dispensing counter from the inside.