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CO practice questions - frequently asked questions

Plain answers about how CO Exam Prep works: the exam, the questions, pricing, the free trial, and what you actually get.

No - and you should be wary of any site claiming otherwise. Every question here is original, written to mirror the style, difficulty, and judgment the real CO exam tests. Each one comes with a plain-language explanation of why the right answer is right and the others aren't.

The CO exam spans 11 domains: Anatomy; Neuro-Anatomy; Physiology; Pharmacology; Diagnostic Testing & Measurement; Ophthalmic Optics; Systemic Diseases & Ocular Motor Disorders; Orthoptic Treatment; Principles of Surgery; Basic Ophthalmic Exam Techniques; Additional Subjects. Every practice question on this site is tagged to one of these domains.

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