Try the full study dashboard free, no signup: practice, flashcards and your Exam Readiness Score. Open it →
OCANZExamPrep
Start free
Home / Practice tests / COE Clinical Science
OCANZ COE written examination · Last updated November 2026

OCANZ COE Written Paper 1: Clinical Science (MCQ): free practice test

Paper 1 of the written component of the OCANZ Competency in Optometry Examination (COE), the exam overseas-trained optometrists pass to register in Australia or New Zealand. It tests vision, optical and clinical science and how you apply them safely, mapped to the Optometry Australia Entry-level Competency Standards (2022). It's sat online over two consecutive days with the Diagnosis and Management paper.

Start the free 15-question testRead the study guide

Premium: 3,000 practice questions, 6 full mock exams, 800 flashcards and 60 comprehensive key notes, topic by topic. See the study path ·

Or open the free COE Clinical Science study dashboard: flashcards, notes and your Readiness Score, no signup →

About the COE Clinical Science exam

Paper 1 of the written component of the OCANZ Competency in Optometry Examination (COE), the exam overseas-trained optometrists pass to register in Australia or New Zealand. It tests vision, optical and clinical science and how you apply them safely, mapped to the Optometry Australia Entry-level Competency Standards (2022). It's sat online over two consecutive days with the Diagnosis and Management paper.

What's on the exam

COE Clinical Science
Ocular Anatomy, Physiology and Visual Pathways
7 key facts
Optics, Refraction and Spectacles
7 key facts
Contact Lenses
7 key facts
Ocular Disease and Examination Techniques
7 key facts
Ocular Pharmacology and Systemic Health
7 key facts
Binocular Vision, Paediatrics and Low Vision
7 key facts
Professional Practice, Occupational Vision and Law
7 key facts

Each branch is a topic in the official outline. Members see every key fact on the full mind map. Read the free study guide →

How to pass the COE Clinical Science exam

  • 144 questions in 3 hours is about 75 seconds each, including reading time. Recall questions should take 30 seconds so you bank time for calculations and clinical scenarios.
  • Spectacles (about 13 questions), contact lenses (about 15) and eye examination techniques and ocular disease (about 18) carry the most marks in OCANZ's guide. Start there.
  • There's no negative marking: answer every question. 24 are unscored pilot items and you can't tell which.
  • No calculator is allowed. Practise Prentice's rule, vertex distance and magnification by hand with round numbers.

Save your results and get your Readiness Score

Create a free account after the test: your score by topic, a mistakes bank, the complete study notes for the first topic, flashcards and the Optometry Formulas & Values Sheet.

Take the test first

What's in the premium COE Clinical Science prep

Premium COE Clinical Science prep is studied one topic at a time. Each step starts with that topic's key notes and flashcard deck, then its own question sets of 25, so you master one topic before you move to the next. When every topic is strong, the 6 full mock exams show you're ready.

3,000practice questions, every answer explained
6full-length mock exams, 144 questions each, timed
800flashcards with spaced repetition, sorted by topic
60comprehensive key notes across 7 topics

Your step-by-step study path

  1. 1
    Ocular Anatomy, Physiology and Visual Pathways9 key notes, 115 flashcards, then 450 practice questions in 18 sets of 25
    Notes free with an account
  2. 2
    Optics, Refraction and Spectacles9 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25
    Premium
  3. 3
    Contact Lenses9 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25
    Premium
  4. 4
    Ocular Disease and Examination Techniques9 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25
    Premium
  5. 5
    Ocular Pharmacology and Systemic Health8 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25
    Premium
  6. 6
    Binocular Vision, Paediatrics and Low Vision8 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25
    Premium
  7. 7
    Professional Practice, Occupational Vision and Law8 key notes, 110 flashcards, then 425 practice questions in 17 sets of 25
    Premium
  8. Final step: 6 full mock exams144 questions each, timed like test day. Pass them, then book your exam.
    Premium
Free with an account

Read the complete COE Clinical Science study notes for “Ocular Anatomy, Physiology and Visual Pathways”

Our first full set of comprehensive notes, about 15 minutes of reading: The cornea and why it matters clinically · Extraocular muscles and their nerves · The visual pathway and field defects · Pupils · Aqueous, lens and retina, a worked exam example, the traps examiners use and a one-minute recap. Create a free account to read it and see how premium notes work before you decide.

Open the free dashboard

Study tools included

3,000 practice questions

3,000 exam-style questions per exam, organized topic by topic in sets of 25. Every answer explained, with the rule it comes from.

6 full mock exams

6 full-length timed mock exams per exam, with real question counts and time limits, so test day feels like practice day.

Exam Readiness Score

One 0 to 100 number that tells you when you're ready to book. Reach 80 and you're covered by our Pass Guarantee.

800 flashcards + spaced repetition

800 flashcards per exam, in a deck for each topic, that come back right before you'd forget them. Five minutes a day keeps every number fresh.

60 comprehensive key notes

60 key notes per exam, split across its topics and each explained in full: the concepts, worked exam examples, the traps examiners use and a quick recap. Your first set is free with an account.

Mind maps

See the whole exam on one screen: every topic and the facts under it.

Sample questions with answers

These are the questions in the free test above, with answers. Try the test first. You'll learn more by getting some wrong.

1. Which cranial nerve supplies the superior oblique muscle?
Answer: Trochlear nerve (IV). The trochlear nerve supplies only the superior oblique (SO4); the abducens supplies only the lateral rectus (LR6). The oculomotor nerve supplies the other extraocular muscles, levator palpebrae and the pupil constrictor.
2. A pituitary adenoma compressing the optic chiasm from below classically produces which visual field defect?
Answer: Bitemporal hemianopia. Nasal retinal fibres, which serve the temporal fields, cross at the chiasm. Pressure there gives a bitemporal defect; from below it typically starts in the superior temporal quadrants. A homonymous defect points to a lesion behind the chiasm.
3. Which corneal layer keeps the stroma relatively dehydrated by active pumping, and has very limited capacity to regenerate in adults?
Answer: Endothelium. The endothelium's Na+/K+-ATPase pump moves fluid out of the stroma (the 'pump-leak' balance). Adult endothelial cells barely divide, so losses are covered by neighbouring cells spreading; when the count falls too far, the cornea becomes oedematous.
4. A patient looks through a point 4 mm below the optical centre of a +5.00 D spherical lens. What prismatic effect do they experience?
Answer: 2 Δ. Prentice's rule: P = c × F, with c in centimetres. 0.4 cm × 5.00 D = 2 Δ. For a plus lens, looking below the optical centre gives base-up prism.
5. What is the correct transposition of +2.00 / −1.00 × 90?
Answer: +1.00 / +1.00 × 180. To transpose: add the sphere and cylinder for the new sphere (+2.00 + −1.00 = +1.00), change the sign of the cylinder (+1.00) and rotate the axis by 90° (180). Check: both forms give +2.00 in the 90° meridian and +1.00 in the 180° meridian.
6. Which organism causes most cases of severe bacterial keratitis in soft contact lens wearers, particularly with overnight wear?
Answer: Pseudomonas aeruginosa. Pseudomonas aeruginosa is the most common cause of contact lens–related microbial keratitis and can progress quickly to a dense infiltrate and perforation. Overnight wear is the biggest risk factor. Acanthamoeba is linked with water exposure.
7. A patient's spectacle prescription is −10.00 DS at a vertex distance of 12 mm. What is the closest soft contact lens power?
Answer: −9.00 DS. Effective power at the cornea = F ÷ (1 − dF) = −10.00 ÷ (1 − 0.012 × −10.00) = −10.00 ÷ 1.12 = −8.93 D, which rounds to −9.00 D. Minus lenses need less power at the cornea; plus lenses need more.
8. In which situation does Goldmann applanation tonometry tend to overestimate the true intraocular pressure?
Answer: A thick central cornea. Goldmann is calibrated for a central corneal thickness of about 520 µm. A thicker, stiffer cornea resists flattening and reads high; a thin cornea or one thinned by LASIK reads low. An oedematous cornea is thick but soft and tends to read low.
9. Which fundus appearance is characteristic of an acute central retinal artery occlusion?
Answer: A cherry-red spot at the fovea with surrounding retinal whitening. Ischaemic swelling makes the inner retina opaque and white, while the thin fovea lets the choroidal circulation show through as a cherry-red spot. Widespread haemorrhages with dilated veins describe a central retinal vein occlusion.
10. Which diagnostic eye drop dilates the pupil by stimulating alpha-1 adrenergic receptors in the iris dilator muscle?
Answer: Phenylephrine. Phenylephrine is a sympathomimetic (alpha-1 agonist) that dilates without paralysing accommodation. Tropicamide and cyclopentolate are antimuscarinics that dilate and cause cycloplegia. Pilocarpine is a muscarinic agonist that constricts the pupil.
11. A patient's long-term medication puts them at risk of a bull's-eye maculopathy, so they need regular retinal screening with OCT and fields. Which drug is it?
Answer: Hydroxychloroquine. Hydroxychloroquine retinopathy damages the parafoveal photoreceptors and RPE, and can progress after the drug stops, so screening aims to find it early. Amiodarone causes vortex keratopathy, tamsulosin intraoperative floppy iris syndrome, and ethambutol optic neuropathy.
12. Which set of findings is typical of convergence insufficiency?
Answer: Exophoria greater at near than at distance, with a receded near point of convergence. Convergence insufficiency gives a larger exophoria at near, a receded near point of convergence and reduced positive fusional vergence at near, with symptoms during reading. Vergence exercises are the first-line treatment.
13. Using the convention M = F ÷ 4, what is the nominal magnification of a +12.00 D hand magnifier?
Answer: 3×. Nominal (effective) magnification compares the lens with viewing at the 25 cm reference distance: M = F ÷ 4 = 12 ÷ 4 = 3×. Manufacturers sometimes quote M = F ÷ 4 + 1 ('trade' magnification), which gives a larger number for the same lens.
14. Under Austroads' Assessing Fitness to Drive, what visual acuity standard applies to a private (car) driver's licence in Australia?
Answer: 6/12 or better with both eyes together, with correction if worn. The private vehicle standard is visual acuity of 6/12 or better with both eyes together. If the driver needs spectacles or contact lenses to reach it, the licence carries a corrective-lens condition. There's also a field standard (at least 110° horizontally). Commercial drivers need 6/9 in the better eye and 6/18 in the worse eye.
15. In Australia, which optometrists may prescribe scheduled medicines for therapeutic use?
Answer: Only optometrists with a scheduled medicines endorsement on their registration. The Optometry Board of Australia's registration standard for endorsement for scheduled medicines sets the rule. The COE itself assesses the non-endorsed level (diagnostic drugs and general pharmacology); therapeutic competence is assessed separately, for example through OCANZ's ACOT.

Get the full COE Clinical Science prep

Most popular · cancel anytime

Premium Monthly

A$217/month
per exam
About A$7.13 a day · a fraction of the A$3,534 you pay for each written exam attempt
  • The OCANZ Clinical Science paper: every topic, mock exam and flashcard
  • 3,000 practice questions + 6 full mock exams per exam
  • 800 flashcards + 60 key notes per exam, by topic, plus mind maps
  • Spaced repetition + mistakes bank
  • Readiness Score & detailed reports
  • Video lessons as they release
  • Content updates during your access
  • 5 bonuses: optometry formulas and values sheet, referral urgency atlas, study planner and more
  • Pass Guarantee: complete the prep, pass or 100% back

Renews monthly until you cancel. Cancel in two clicks from your account; you keep access until the end of the month you've paid for. No minimum term.

Best value · 3 months free

Premium Yearly

A$1,953/year
per exam
Pay for 9 months, get 12. Save A$651 against paying monthly.
  • The OCANZ Clinical Science paper: every topic, mock exam and flashcard
  • 3,000 practice questions + 6 full mock exams per exam
  • 800 flashcards + 60 key notes per exam, by topic, plus mind maps
  • Spaced repetition + mistakes bank
  • Readiness Score & detailed reports
  • Video lessons as they release
  • Content updates during your access
  • 5 bonuses: optometry formulas and values sheet, referral urgency atlas, study planner and more
  • Pass Guarantee: complete the prep, pass or 100% back

Renews once a year until you cancel. We email you before each renewal. Cancel any time from your account; you keep access until the end of the year you've paid for.

Pass Guarantee. Complete the full prep, sit your exam within 60 days, and if you don't pass we refund 100% of your subscription payments. See the requirements
Secure checkout by Stripe Card, Apple Pay, Google Pay Pass Guarantee

Certification guide

How to become an optometrist in Australia or New Zealand with an overseas qualification: To practise as an optometrist in Australia you must be registered with the Optometry Board of Australia through Ahpra; in New Zealand, with the Optometrists and Dispensing Opticians Board. If you trained overseas, you must either pass the [OCANZ Competency in Optometry Examination](https://ocanz.org/examination/overseas-optometrists/) (COE) or complete an accredited optometry course in Australia or New Zealand. Here are the COE steps and what they cost.

COE Clinical Science exam FAQ

How many questions are on the COE Clinical Science exam?

144 multiple-choice questions (120 scored, 24 unscored pilot questions), four options each, with a time limit of 3 hours (including reading time). Format: closed book, online remote-proctored; no calculators or notes (one blank a4 page allowed).

What is the passing score for COE Clinical Science?

Not published. OCANZ doesn't announce a fixed pass mark; practise to 70% or higher.

How much does the COE Clinical Science exam cost?

A$3,534 for both written papers or A$1,858 for one paper, per attempt (2026–27), after the A$868 eligibility assessment. OCANZ sets its fees each financial year (the current ones run 1 July 2026 to 30 June 2027), so confirm on its website before you apply.

Which languages is the COE Clinical Science exam offered in?

English.

Where do I take the COE Clinical Science exam?

OCANZ, online with live remote proctoring, taken from home or another suitable place.

Is this COE Clinical Science practice test free?

Yes. The 15-question practice test on this page is free, with an explanation for every answer and no signup. A free account also unlocks the complete study notes for the first topic. The full COE Clinical Science prep is Premium at A$217 a month for this exam.

What's in the premium COE Clinical Science prep?

3,000 practice questions organized topic by topic (Ocular Anatomy, Physiology and Visual Pathways: 450; Optics, Refraction and Spectacles: 425; Contact Lenses: 425; Ocular Disease and Examination Techniques: 425; Ocular Pharmacology and Systemic Health: 425; Binocular Vision, Paediatrics and Low Vision: 425; Professional Practice, Occupational Vision and Law: 425), 6 full-length timed mock exams of 144 questions, 800 flashcards and 60 comprehensive key notes split across all 7 topics, plus a mistakes bank and the Readiness Score.

Related practice tests

Exam details are summarized from the official candidate information available in November 2026. the Optometry Council of Australia and New Zealand changes formats and fees, so confirm with Optometry Council of Australia and New Zealand (OCANZ) before you book. OCANZExamPrep is not affiliated with the Optometry Council of Australia and New Zealand.

Start the free test