Practise scientific mechanisms, passage-based inference, physics calculations and quantitative decisions for the OAT with focused concepts and explained drills. These are independent learning materials, not official exam questions or a pass prediction.
Read the Optometry Admission Test (OAT): Free Preparation Guide and Practice study guide and official exam sourcesExam outline and official sources
Association of Schools and Colleges of Optometry (ASCO), governing body; American Dental Association Department of Testing Services (ADA DTS), implementation · 2026 OAT Candidate Guide, updated August 6, 2026, with organic chemistry implementation confirmed for June 2026 by the issuer's September 23, 2026 update. Reviewed for October 9, 2026, Asia/Hong_Kong. The assigned OAT label matches the official examination name; occupational-therapy wording mentioned in the supplied earlier evidence is an inaccurate alias. Canonical slug retained.
This original 20-question sample covers selected topics across the outline. It does not reproduce official exam questions or cover every tested topic.
- Official Optometry Admission Test website
- 2026 OAT Candidate Guide, updated August 6, 2026
- Recent and Forthcoming Updates to Examinations, updated September 23, 2026
- NEW Organic Chemistry Examination Specifications, updated August 13, 2025
- 2026 OAT Candidate Guide, December 15, 2025 version — supplied frozen evidence
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Optometry Admission Test (OAT)
Start with 20 free questions, then review the explanations and any topics you missed.
A model cell contains 0.30 M of a solute that cannot cross its membrane. It is placed in a large bath containing 0.10 M of the same solute. Water can cross freely, and there is initially no opposing pressure difference. What is the initial response?
Optometry Admission Test (OAT)
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Survey of the Natural Sciences
Biology: tonicity
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