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MC
Multiple-choice questions
Timed
Computer-based test
Scaled
Criterion-referenced
CPO
AOA certified
Visual acuity, pupils, confrontation fields, color vision
Tonometry, retinoscopy, keratometry, imaging
Insertion/removal, care systems, patient education
Lensometry, frame selection, lens types, measurements
Anatomy, common conditions, pharmacology basics
Scheduling, insurance, patient communication, HIPAA
Start with preliminary testing and ocular health. These are the most heavily tested areas. Do 20-30 practice questions daily to set a baseline.
Work through ophthalmic procedures, contact lens skills, and optics. Bump up to 40-50 questions daily. Let Opterio's analytics guide where you spend your time.
Cover practice management, then take full-length practice tests. Revisit your weakest areas. Take it easy the last couple of days before the exam.
If you hold a CPOA, you already know the basics. Focus your CPO prep on the advanced procedures and optics sections.
Reviewing material at the right intervals locks it into long-term memory. Opterio handles the scheduling for you.
Preliminary testing and ophthalmic procedures together make up nearly 40% of the exam. Nail those first.
Short daily sessions are more effective than weekend cram sessions. Make studying part of your routine.
Focus on understanding the why behind procedures and concepts. That helps you handle tricky application questions.
Timed practice tests build stamina and help you manage your pace on the real exam.
Purpose-built for paraoptometric exams. Study the right material at the right time.
Opterio adapts to you. The system tracks what you know and what you don't, and adjusts your practice accordingly.
Practice questions covering all CPO exam content areas with expert-level explanations for every answer.
Get detailed breakdowns of every question so you understand the reasoning, not just the correct answer.
See your performance by domain. Know exactly where to focus your next study session.
Visual dashboards show your improvement over time and help you know when you are exam-ready.
Web and mobile access. Squeeze in practice questions during lunch, on the commute, or between patients.
The CPO (Certified Paraoptometric) exam is administered by the American Optometric Association (AOA). It is the advanced-level certification for paraoptometric professionals who work alongside optometrists. The exam covers preliminary testing, ophthalmic procedures, contact lens skills, ophthalmic optics, ocular health and disease, and practice management. Earning your CPO shows that you have the knowledge and clinical skills to handle a wide range of responsibilities in an optometric practice.
The CPO exam is a multiple-choice, computer-based test. It uses scaled scoring with a criterion-referenced passing standard. You will receive your results with a breakdown by content area, so you can see which topics you performed well on and which need more work. The exam is offered at testing centers across the country.
Plan for 3 to 4 months of study, spending about 1 to 2 hours per day. The CPO covers more advanced material than the CPOA, so give yourself enough time to work through the clinical and optics topics thoroughly. If you already hold a CPOA, you will have a solid foundation to build on. Opterio's adaptive learning adjusts to your level and keeps you focused on your weakest areas.
Opterio provides AI-powered adaptive practice that learns your strengths and weaknesses, a question bank built for paraoptometric exams, instant detailed explanations for every question, spaced repetition that helps you remember what you study, domain-level progress tracking, and the ability to study on your phone or computer. Our platform is designed to help you study efficiently and walk into exam day feeling confident.
Explore career paths in eye care, including paraoptometric roles and advancement options.
Looking at the entry-level paraoptometric certification? See our CPOA guide.
Interested in ophthalmic assistant certification? Check out our COA prep guide.
Considering optician certification too? See our comprehensive ABO prep guide.
Detailed breakdown of the CPO exam format, domains, eligibility, and costs.
Entry-level vs. assistant — understand when to advance your certification.
Daily roles, certification levels, and career outlook for paraoptometrics.
The full CPO → CPOA → CPOT advancement path with timelines and salary progression.
Find CPO/CPOA certification programs, AOA study resources, and online options.
Join Opterio today and get AI-powered practice questions, personalized study plans, and everything you need to earn your CPO certification.