An independent, unofficial guide to the current Optometry Admission Test (OAT) — not affiliated with or endorsed by ASCO or the American Dental Association (ADA), which administers the test.
Format last checked: September 2026. The OAT is delivered year-round by appointment at Prometric testing centers and consists of four timed sections taken in one sitting: Survey of the Natural Sciences, Reading Comprehension, Physics, and Quantitative Reasoning. Organic Chemistry specifications have been updated periodically (most recently expected around June 2026) — verify current section counts, timing, specifications, and fees against the official OAT candidate guide before scheduling.
Survey of the Natural Sciences (Biology 40, Gen Chem 30, Org Chem 30)
100
90 min, one shared clock
Reading Comprehension
50
60 min (3 passages)
Physics
40
50 min
Quantitative Reasoning
40
45 min
Independently researched from publicly available OAT program materials — verify current figures against the official OAT candidate guide before relying on them for study or scheduling.
How this platform's testlets differ
The real Natural Sciences section runs Biology, General Chemistry, and Organic Chemistry under one shared 90-minute clock with no sub-timer per subject, and Reading Comprehension, Physics, and Quantitative Reasoning are each single continuous timed sections. This portal instead lets you drill one of the six content areas at a time: pick a section below and take a focused, timed, 15-question testlet (fewer if a section's bank has fewer items), paced proportionally to the real section's minutes-per-question. It won't feel like sitting the full-length exam, but it's built for honest, untimed-then-timed review of each content area.
A note on scoring
The real OAT converts raw scores to a 200–400 scale per section (plus a Total Science composite of Bio/GC/OC and an Academic Average composite) using the testing program's own proprietary conversion tables, which are not publicly reproducible. This portal cannot recreate that conversion, so testlet results here report plain accuracy (percent correct) on a fixed testlet, with a study-signal label — not a 200–400 scaled score of any kind.
Study Guide
Strategy notes for each of the six OAT content areas built out on this platform — general study approaches, written for this platform.
Practice Bank
Untimed, with explanations. Filter by section or topic, answer, then reveal the explanation whenever you're ready.
Section Testlets
Choose one section below to take a focused, timed testlet, paced proportionally to the real OAT's minutes-per-question for that section — since Biology, General Chemistry, and Organic Chemistry share one clock on the real exam, this is a study grouping, not a simulation of the real test structure.
Once you start, the clock runs continuously and auto-submits when it hits zero. Explanations are withheld until you finish.
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14:00
Flashcards
Untimed recall practice built from the same question bank as Practice Bank and Mock Exams — read the question, try to answer it yourself, then reveal the answer and mark whether you had it.
Score History
Saved on this device only (browser local storage) — nothing is sent anywhere.