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optical.education is not affiliated with, endorsed by, or sponsored by the American Board of Opticianry and National Contact Lens Examiners (ABO-NCLE), the International Joint Commission on Allied Health Personnel in Ophthalmology (IJCAHPO), Prometric, Pearson VUE, or any state licensing board. We don't use their logos.
Trademarks
Names such as ABO, NCLE, NOCE, CLRE, ABOC, and NCLEC are used only to identify and describe the exams and credentials offered by ABO-NCLE. COA®, COT®, and COMT® are registered marks of IJCAHPO. optical.education is not affiliated with or endorsed by IJCAHPO. All other marks belong to their respective owners.
Original practice questions
Our practice questions and explanations are written by optical.education. They are not taken from, and do not reproduce, any official examination. Questions marked as under expert review are study prompts that haven't completed credentialed review. Practice scores are not a prediction of exam results, and using this site does not guarantee a passing score.
Not medical advice
Content on this site is for education about professional certification and general optical concepts. It is not medical advice, diagnosis, or treatment, and it is not instruction for performing clinical procedures. If you have a question about your own eyes or health, contact a qualified eye-care provider.
Requirements change
Exam formats, fees, testing windows, eligibility rules, renewal requirements, and state licensing laws change. We note when each page was last reviewed (currently Oct 8, 2026) and link to official sources. Always confirm current requirements with ABO-NCLE, IJCAHPO, or your state board before registering, applying, or making career decisions.
Calculators
Calculators are study aids. Verify all eyewear with appropriate instruments and follow your practice's procedures.
Questions
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