PrepPass also publishes a complete study guide for this exam as a downloadable book (225 pages, 244 practice questions inside, $19.99).
Test what you know · free, all of it
The same 100 questions, dealt five ways. Pick the one that fits the time you have.
Learn what the questions test
Practice finds the gaps. Reading closes them. The four chapters below are free to read online. The study guide book is a separate download, sold on its own page.
Before you sit
See the questions first
Real items, with the answer marked and the reason written out — the same format as all 100.
What is the focal length of a +2.00 D lens?
Why: Focal length in meters equals 1 divided by the lens power in diopters. 1 / 2.00 = 0.50 m, or 50 cm. A stronger plus lens would have a shorter focal length.
To relieve a frame that sits too low on the face, the optician should adjust what?
Why: If the frame slides down, narrowing or tightening the nose pads (or choosing a smaller bridge) raises the frame and improves the fit. Adjusting the bridge controls how high the frame rides.
The exam itself
| Questions | 125 |
|---|---|
| Time | 120 minutes |
| Sections | Ophthalmic Optics · Prescription Analysis · Dispensing · Instruments & Regulatory · Optical Math |
| Our bank | 100 questions · updated August 2026Written from American Board of Opticianry (ABO-NCLE) |
| Languages | English |
| Source | American Board of Opticianry (ABO-NCLE) |
Helpful resources
Register — ABO-NCLE (official) →
Recommended prep — books & tools
The standard opticianry textbook the ABO exam draws from.
See it on Amazon →This section contains affiliate links. As an Amazon Associate, PrepPass earns from qualifying purchases. We may earn a commission if you buy through these links, at no extra cost to you.
Allied Health Certification Exams
Studying for the ABO NOCE (American Board of Opticianry National Opticianry Competency Examination) in order? ABO Study Guide — 2026 Edition — PDF + EPUB, $19.99 · 14-day refund →
Questions
All 100 questions, the timed mock and the report are free with no sign-up. A free account only adds saving your progress. The study guide book is sold separately, $19.99 one-time; nothing in the practice requires it.
No. Ours is 100 questions in 120 minutes; the real exam is 125 questions in 120 minutes. Use the mock for stamina and section timing, not as a score predictor.
Yes. PrepPass sells ABO Study Guide — 2026 Edition, a PDF + EPUB download, $19.99 one-time; the practice on this page stays free without it. See the study guide →