ABO Advanced study guide
ABO Advanced · Work through your exam, one topic at a time.
The American Board of Optometry (ABO) offers voluntary board certification for optometrists who want to demonstrate competence beyond entry level. Candidates begin by applying to become an Active Candidate, which initiates a verification process, and then sit for the board certification examination during a scheduled examination window. The credential is aimed at practicing optometrists - including those in active military, VA, or public health settings - who want external validation of their clinical knowledge and a structured framework for lifelong learning. The ABO also offers a Certificate of Added Qualification (CAQ) for Diplomates who demonstrate advanced knowledge in focused areas of optometry, and maintains a public verification database so patients and employers can confirm status. Topics on this exam: Optometry Clinical Knowledge (content domains not enumerated in source) and Optometry Professional Practice and Lifelong Learning (content domains not enumerated in source). The ABO Advanced study guide has 2 sections and about 625 words.
01Optometry Clinical Knowledge: Refraction, Binocular Vision, and Ocular Disease Reasoning
Clinical questions reward a layered approach: anatomy and optics first, then measurement, then interpretation. Be fluent in the vergence formula (L' = L + F), the relationship between accommodation and convergence (AC/A ratio, typically 4-6 prism diopters per diopter), and the difference between manifest and cycloplegic refraction. Know the standard diagnostic criteria for dry eye (TBUT, osmolarity, staining patterns), the classification of glaucoma by angle status and optic nerve appearance (cup-to-disc ratio, rim thinning, RNFL defects), and the hallmark signs of macular disease (drusen, metamorphopsia on Amsler grid). Pediatric milestones matter: by what age should a child fix and follow, and when does a failed photoscreening warrant referral?
329 words, about 2 min02Optometry Professional Practice and Lifelong Learning: Standards, Ethics, and Evidence Use
Professional practice questions test your grasp of scope of practice, documentation standards, informed consent, and continuing education. Know that record-keeping should capture chief complaint, history, findings, assessment, and plan, and that referral decisions must be documented with rationale. Understand informed consent elements: capacity, disclosure of risks and alternatives, voluntariness, and documentation. Be familiar with how evidence is graded (systematic reviews and randomized trials above case reports) and how to appraise a study for bias, sample size, and applicability to your patient population.
296 words, about 1 min