COST Study Guide 2026
Everything you need to pass the COST exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
COST exam key facts
- The IJCAHPO Ophthalmic Surgical Assisting (OSA) exam, the official credential behind the 'Certified Ophthalmic Surgical Technologist' label, has 80 multiple-choice questions. Source
- Candidates get 60 minutes to complete the IJCAHPO Ophthalmic Surgical Assisting (OSA) exam. Source
- IJCAHPO sets the OSA passing score with a modified Angoff procedure and does not publish the cut score. Source
- The IJCAHPO Ophthalmic Surgical Assisting (OSA) exam costs $145 for a first attempt. Source
- Candidates who fail the IJCAHPO OSA exam have 12 months from their first test date to submit two retest applications; after a second failed retest they must wait 12 months from the first test date and reapply in full. Source
- IJCAHPO certifications, including the OSA, are valid for 36 months, and the OSA cycle is aligned with the holder's core certification cycle. Source
📚 COST Topics to Study (29)
✍️ Sample COST Questions & Answers
1. What role does documentation play in patient safety protocols?
Thorough documentation in patient safety protocols is both a legal requirement and essential for continuity of patient care.
2. What is the main purpose of the Bowie-Dick test run in a prevacuum steam sterilizer?
The Bowie-Dick test detects residual air pockets that would block steam penetration in dynamic air-removal sterilizers.
3. According to AAMI/AORN guidance, when is immediate-use steam sterilization (IUSS) appropriate?
IUSS is meant for urgent situations, not for convenience or to make up for too few instrument sets.
4. Which cells of the retina are primarily responsible for phototransduction in low-light (scotopic) conditions?
Rod photoreceptors contain rhodopsin and are exquisitely sensitive to dim light, making them the primary mediators of scotopic (night) vision.
5. What is the primary route by which aqueous humor drains from the eye to maintain intraocular pressure?
About 80–90% of aqueous outflow occurs through the trabecular meshwork into Schlemm's canal, then into the episcleral venous system.
6. What is the standard of care requirement for patient communication in clinical practice?
The standard of care is defined as what a reasonably competent practitioner with similar training would provide under similar circumstances.
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📖 COST Guides & Articles
What Practice Test Geeks adds beyond an AI chat for COST
An AI chatbot can quiz you, but it can't reproduce the exam conditions or keep your record. Here you get:
- A fixed COST question bank: the same test every attempt, so your score is comparable from one try to the next instead of changing with every regenerated quiz.
- Progress saved on your device: completed tests, scores and missed questions stay in My Progress, so you can retake only what you got wrong.
- A printable COST cheat sheet you can print or save as a PDF.
- COST flashcards built from the same question bank.
- Free COST practice tests with the correct answer shown after each question.
How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy
Sources & references
Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy
- documents.jcahpo.org — Passing score, retake policy, score release, score validity, fees, retake fee, test dates, exam information · verified Oct 2026
- jcahpo.org — Eligibility, exam format, time limit · verified Oct 2026
- pearsonvue.com — Test delivery · verified Oct 2026