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Key Facts: COMT Exam

190

Exam Questions

IJCAHPO Core Certification Criteria

180 min

Exam Time

IJCAHPO Core Certification Criteria

$340

Exam Fee

IJCAHPO fee schedule (1 MC + 1 skill attempt)

36 mo

Certification Validity

36 IJCAHPO CE credits to recertify

188

Practice Questions Here

OpenExamPrep question bank

The IJCAHPO COMT multiple-choice examination has 190 questions and a 180-minute limit, delivered at Pearson VUE test centres. Full certification also requires the computer-simulated COT Skill Evaluation (7 tasks, 120 minutes) and COMT Performance Test (5 tasks, 60 minutes). Five eligibility pathways (COMT-TG1 to COMT-TG5) run through an ICA-accredited Medical Technologist program, current COT certification, or current orthoptist certification. Ocular motility testing is the single heaviest content area at 12%. Certification renews every 36 months with 36 IJCAHPO continuing education credits.

Sample COMT Practice Questions

Try these sample questions to review concepts for the COMT exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 188+ question experience with AI tutoring.

1During fluorescein angiography, the dye is injected into which vessel?
A.Carotid artery
B.Antecubital vein
C.Ophthalmic artery
D.Jugular vein
Explanation: Sodium fluorescein is injected intravenously, typically into the antecubital vein of the arm. The dye reaches the retinal and choroidal circulation within 10-15 seconds (arm-to-retina transit time). Serial photographs are taken as the dye transits through the choroidal and retinal vasculature, revealing vascular abnormalities, leakage, and non-perfusion.
2What is the most common adverse reaction to intravenous fluorescein dye?
A.Cardiac arrest
B.Nausea and/or vomiting
C.Permanent skin discoloration
D.Retinal detachment
Explanation: Nausea is the most common adverse reaction to IV fluorescein, occurring in approximately 5% of patients. Vomiting may follow. More serious reactions (urticaria, bronchospasm, anaphylaxis) are rare but potentially life-threatening, so emergency medications and equipment must be readily available. The dye causes temporary yellow discoloration of skin and urine for 24-48 hours.
3Which electrophysiology test measures the electrical response of the entire retina to light stimulation?
A.Electrooculogram (EOG)
B.Full-field electroretinogram (ffERG)
C.Visual evoked potential (VEP)
D.Multifocal ERG (mfERG)
Explanation: The full-field ERG (ffERG) measures the summed electrical response of all retinal cells (photoreceptors and inner retinal neurons) to a full-field light stimulus. It evaluates generalized retinal function and is used to diagnose conditions like retinitis pigmentosa, cone dystrophy, and rod-cone dystrophy. The VEP measures visual cortex responses, not retinal function.
4In fluorescein angiography, hyperfluorescence due to dye leakage from abnormal vessels is most characteristic of:
A.Normal retinal vasculature
B.Choroidal neovascularization (CNV)
C.Optic atrophy
D.Corneal dystrophy
Explanation: Choroidal neovascularization (CNV) involves abnormal blood vessel growth beneath the retina. These new vessels have incompetent walls that leak fluorescein, producing progressive hyperfluorescence that increases in size and intensity during the angiogram. CNV is the hallmark of wet age-related macular degeneration and requires anti-VEGF treatment.
5Which imaging modality uses indocyanine green (ICG) dye to primarily evaluate the choroidal vasculature?
A.Fundus autofluorescence
B.ICG angiography
C.OCT angiography
D.B-scan ultrasonography
Explanation: ICG angiography uses indocyanine green dye, which is 98% protein-bound and has near-infrared fluorescence properties, allowing it to penetrate the retinal pigment epithelium and reveal choroidal circulation details. It is particularly useful for diagnosing polypoidal choroidal vasculopathy, central serous chorioretinopathy, and occult CNV that may not be visible on fluorescein angiography.
6ICG angiography is contraindicated in patients with allergy to:
A.Penicillin
B.Iodine or shellfish
C.Latex
D.Aspirin
Explanation: ICG dye contains iodine, so it is contraindicated in patients with known iodine or shellfish allergies. ICG is also contraindicated in patients with liver disease because it is metabolized hepatically. Fluorescein angiography does not contain iodine and is a safer alternative for iodine-allergic patients.
7The visual evoked potential (VEP) test primarily evaluates the function of which structure?
A.Retinal photoreceptors
B.Visual cortex and optic nerve pathway
C.Extraocular muscles
D.Corneal endothelium
Explanation: The VEP measures the electrical response of the visual cortex (occipital lobe) to visual stimulation, evaluating the integrity of the entire visual pathway from the retina through the optic nerve, chiasm, and optic radiations to the cortex. Abnormal latency or amplitude can indicate optic neuritis, demyelinating disease, or compressive lesions.
8In ophthalmic ultrasonography, what does the A-scan mode display?
A.A two-dimensional cross-sectional image
B.A one-dimensional series of amplitude spikes along a single axis
C.A three-dimensional reconstruction
D.A color Doppler image
Explanation: A-scan (amplitude scan) ultrasonography displays a one-dimensional graph of echo amplitude spikes along a single sound beam axis. Each spike represents a tissue interface where the ultrasound beam encounters a change in acoustic density. A-scan is used primarily for axial length measurement (biometry) for IOL calculations and for tissue differentiation.
9Which contact lens material has the highest oxygen permeability?
A.PMMA (polymethyl methacrylate)
B.Silicone hydrogel
C.Conventional hydrogel
D.Hard resin
Explanation: Silicone hydrogel lenses have the highest oxygen permeability (Dk) due to the silicone component, which allows oxygen to pass through the material. This significantly reduces the risk of corneal hypoxia compared to conventional hydrogels. PMMA is rigid and has essentially zero oxygen permeability; GP (gas permeable) lenses allow oxygen mainly through tear exchange.
10Which parameter is most critical when fitting a rigid gas permeable (RGP) contact lens?
A.Lens color
B.Base curve relative to corneal curvature
C.Patient's hair color
D.Ambient room temperature
Explanation: The base curve of an RGP lens must be appropriately related to the patient's corneal curvature (measured by keratometry or topography) to achieve a proper fitting relationship. A lens that is too flat will decenter and cause discomfort; a lens that is too steep will trap air bubbles and restrict tear exchange. Fluorescein pattern evaluation guides adjustments.

About the COMT Exam

The COMT is the advanced core IJCAHPO credential for allied ophthalmic personnel. Certification requires passing a 190-question, 180-minute multiple-choice examination at a Pearson VUE test centre plus two computer-simulated practical examinations: the 7-task COT Skill Evaluation and the 5-task COMT Performance Test. The written exam spans 22 content areas, led by ocular motility testing (12%), ophthalmic imaging (9%), patient services and education (8%), photography and videography (8%), and contact lenses (7%). COMTs work in ophthalmology practices, academic medical centres and research institutions performing advanced diagnostic testing, refraction, specialty lens fitting and surgical assisting.

Exam sponsor: IJCAHPO / Pearson VUE test centres. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

190 multiple-choice questions, plus the 7-task COT Skill Evaluation and the 5-task COMT Performance Test

Time Limit

180 minutes

Passing Score

Scaled passing score (criterion-referenced); IJCAHPO does not publish the cut score

Exam / Certification Fees

$340 for one multiple-choice examination plus one skill attempt

Exam sponsor website

Reported exam pass rate: Not publicly disclosed by IJCAHPO. IJCAHPO does not publish pass rate data Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

3%

History and Documentation

Ocular, medical, medication, social, and family history taking and accurate chart documentation.

3%

Visual Assessment

Distance and near acuity at every level (counting fingers to no light perception), special populations, pinhole, stereoacuity, near point of accommodation and convergence, AC/A ratio, magnification calculation, and low vision devices.

6%

Visual Field Testing

Amsler grid, confrontation fields, automated static perimetry, and Goldmann kinetic perimetry.

3%

Pupil Assessment

Measuring, comparing, and evaluating pupil size, shape, reactivity, and relative afferent pupillary defect.

2%

Tonometry

Applanation tonometry, hand-held applanators, non-contact tonometry, and tonometer cleaning and disinfection.

2%

Keratometry

Automated and manual keratometry.

12%

Ocular Motility Testing

Versions, ductions, muscle functions and anomalies, near point convergence and accommodation, fusional convergence amplitudes, cover tests, prism measurement of strabismus, Worth 4-Dot, Maddox rod, Krimsky, stereoacuity, nystagmus, amblyopia therapy, and convergence training.

4%

Lensometry

Automated and manual neutralisation of spectacles, Fresnel prism, ground-in prism, slab-off, and the Geneva lens clock.

6%

Refraction, Retinoscopy and Refinement

Autorefraction, retinoscopy, refinement of sphere and cylinder in plus or minus cylinder, fogging, duochrome, binocular balance, vertex distance, transposition, spherical equivalent, and near add determination.

3%

Biometry

Diagnostic/standardised A-scan and B-scan echography.

6%

Supplemental Testing

Glare testing, potential acuity meter, slit lamp and slit lamp lenses, direct ophthalmoscopy, colour vision plates and specialised colour tests, pachymetry, anterior chamber depth, OCT and scanning laser testing, tear tests, contrast sensitivity, head and posture assessment, exophthalmometry, wavefront diagnostics, fusional amplitudes, Maddox rod, corneal sensitivity, fluorescein and ICG angiography phases, and identification of ERG, VEP, and EOG.

2%

Microbiology

Types of microorganisms, pathways of disease transmission, assisting with conjunctival and corneal specimen collection, and Universal Precautions.

4%

Pharmacology

Drug delivery routes, prescription components, drop and ointment instillation, and the indications, contraindications, and side effects of mydriatics, cycloplegics, glaucoma drugs, anti-infectives, allergy medications, steroids, NSAIDs, lubricants, anaesthetics, diagnostic agents, nutritional supplements, and anti-neovascular drugs.

4%

Surgical Assisting

Instrument preparation and maintenance, aseptic technique, sterilisation, surgical site identification, refractive surgery, non-refractive laser therapy, YAG laser, intraocular injections, and laser safety.

8%

Ophthalmic Patient Services and Education

Communication, care of diverse populations, patient education and counselling, dressings and shields, prosthetic and lens care instruction, urgency-based scheduling, first aid for acute ophthalmic emergencies, vital signs, CPR, charting, and patient flow.

4%

General Medical Knowledge

Ocular anatomy and physiology, body systems, eye diseases by structure, ocular manifestations of systemic disease, cranial nerves III to VII, the visual pathway, medical terminology and abbreviations, and hazardous waste safety.

2%

Optics and Spectacles

Cylinder transposition, prescriptions, vertex distance measurement and conversion, the Geneva lens clock, and progressive lens markings.

7%

Contact Lenses

Lens types, wearing schedules, care systems, follow-up, contraindications and symptoms, fitting soft, rigid, toric, and bifocal lenses, and specialty lenses for irregular corneas, post-transplant eyes, keratoconus, cosmetic/prosthetic use, and bandage wear.

9%

Ophthalmic Imaging

Fluorescein angiography, corneal topography, and scanning laser testing for glaucoma and retina (HRT, OCT).

8%

Photography and Videography

Slit lamp and anterior segment photography, fundus photography, and external photography.

1%

Equipment Maintenance and Repair

Changing instrument batteries, maintaining and calibrating equipment per manufacturer recommendations, emergency equipment, cleaning lenses and prisms, and supply inventory.

1%

Medical Ethics, Legal and Regulatory Issues

Coding, government and institutional rules, quality assurance, ethical and legal standards, scribing, confidentiality, and informed consent.

Preparing for the COMT Exam

What You Need to Know

  • Passing score: Scaled passing score (criterion-referenced); IJCAHPO does not publish the cut score
  • Assessment: 190 multiple-choice questions, plus the 7-task COT Skill Evaluation and the 5-task COMT Performance Test
  • Time limit: 180 minutes
  • Exam / certification fees: $340 for one multiple-choice examination plus one skill attempt Official sources

Using Our Practice Resources

  • Work through all 188 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

COMT: Suggested Study Strategy

1Ocular motility testing is 12% of the COMT exam — roughly 23 of 190 questions. Drill versions and ductions, the six cardinal positions, Hering's and Sherrington's laws, alternate and simultaneous prism cover testing, Krimsky and Hirschberg, Worth 4-Dot, Maddox rod, fusional amplitudes and near point of convergence until the measurement conventions are automatic.
2Imaging plus photography is 17% combined. Know the fluorescein transit phases in order, what leakage, staining, pooling, window defects and blocked fluorescence look like, the ETDRS fundus photography fields, and how to correct the common fundus camera artefacts (central haze, crescents, dust arcs).
3Do not skip the low-weight areas — equipment maintenance, ethics and keratometry are only 1–2% each, but they are easy points. Know informed consent versus confidentiality, scribing rules, Geneva lens clock use, and manual keratometry drum readings.
4Refraction, retinoscopy and refinement is 6%. Practise transposition and spherical equivalent arithmetic, vertex distance conversion for powers over ±4.00 D, and the with/against motion rules of streak retinoscopy.
5Ophthalmic patient services and education is 8% — more than surgical assisting and pharmacology combined. Expect scenario questions on triage urgency, chemical burn first aid, drop instillation instruction, prosthesis care and communication with distressed patients.

Frequently Asked Questions

What is the COMT exam?

The COMT (Certified Ophthalmic Medical Technologist) is the advanced core certification from IJCAHPO. The written component is a 190-question, 180-minute multiple-choice examination delivered at Pearson VUE test centres. Full certification also requires passing the computer-simulated COT Skill Evaluation and the COMT Performance Test.

What are the prerequisites for the COMT exam?

IJCAHPO publishes five pathways. COMT-TG1 and COMT-TG2 are for graduates of an ICA-accredited Medical Technologist training program. COMT-TG3 requires current COT certification plus 6,000 hours worked as a COT within the previous 60 months. COMT-TG4 is for current Certified Orthoptists with 4,000 hours. COMT-TG5 is a fast track for current COTs with 3,000 certified hours plus 6,000 non-certified hours.

How much does the COMT exam cost?

IJCAHPO charges $340 for one multiple-choice examination plus one skill attempt, $290 for a first retest and $150 for a second. The initial COMT Performance Test is $110 and a Performance Test retest is $85. Recertification costs $125 every 36 months.

What is the difference between COT and COMT?

Both are core IJCAHPO credentials with 180-minute written exams, but the COT exam has 200 questions and the COMT exam has 190. The COMT blueprint shifts weight toward advanced skills: ocular motility testing rises from 6% to 12%, contact lenses from 5% to 7%, ophthalmic imaging from 7% to 9%, and photography and videography from 6% to 8%. COMT candidates also complete the COMT Performance Test in addition to the COT Skill Evaluation.

What are the most important topics on the COMT exam?

Ocular motility testing is the single largest content area at 12%. Ophthalmic imaging (9%), ophthalmic patient services and education (8%), photography and videography (8%) and contact lenses (7%) follow. Together those five areas account for 44% of the 190 scored items.