Career upgrade: Learn practical AI skills for better jobs and higher pay.
Level up
PracticeVideosBlogFlashcardsEspañol
All Practice Exams

100+ Free COT Practice Questions

Pass your IJCAHPO Certified Ophthalmic Technician exam on the first try — instant access, no signup required.

✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately
Not publicly disclosed by IJCAHPO Pass Rate
100+ Questions
100% Free
1 / 100
Question 1
Score: 0/0

When performing fundus photography, the patient should be instructed to:

A
B
C
D
to track
Same family resources

Explore More IJCAHPO Ophthalmic Certifications

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

JCAHPO COA Certified Ophthalmic Assistant

Practice QuestionsStudy GuideFlashcards
1 blog

IJCAHPO CCOA Corporate Certified Ophthalmic Assistant

Practice Questions

IJCAHPO CDOS Certified Diagnostic Ophthalmic Sonographer

Practice Questions

IJCAHPO Certified Ophthalmic Medical Technologist

Practice Questions

IJCAHPO OSA Ophthalmic Surgical Assisting

Practice Questions

IJCAHPO OSC Ophthalmic Scribe Certification

Practice Questions

More From This Family

Videos and articles for deeper review.

ArticleFREE IJCAHPO COT Exam Guide 2026: 200 Questions + 7 Skills15 min readArticleIJCAHPO COA Exam 2026: FREE Certified Ophthalmic Assistant Study Guide & Pathways34 min read
2026 Statistics

Key Facts: COT Exam

200

Exam Questions

IJCAHPO COT (170 scored + 30 pretest)

3 hrs

Exam Time

IJCAHPO testing guidelines

$250

Exam Fee

IJCAHPO COT application

3 yrs

Certification Validity

18 Group A CE credits to renew

100

Practice Questions Here

OpenExamPrep question bank

The IJCAHPO COT exam consists of 200 multiple-choice questions (170 scored + 30 pretest) administered over 3 hours at Prometric testing centers. The exam uses criterion-referenced scoring. Prerequisites include current COA certification, minimum 1 year of ophthalmic experience, and completion of an approved training program. Certification renews every 3 years with 18 Group A CE credits. The COT is the mid-level IJCAHPO credential between COA and COMT.

Sample COT Practice Questions

Try these sample questions to test your COT exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What is the standard distance used for Snellen visual acuity testing?
A.10 feet
B.20 feet
C.30 feet
D.40 feet
Explanation: The Snellen chart is standardized for testing at 20 feet (6 meters). At this distance, the optotypes subtend specific visual angles that correspond to normal visual acuity (20/20). Testing at a non-standard distance would invalidate the results unless properly converted.
2A patient reads the 20/40 line on the Snellen chart. What does this mean?
A.The patient can see at 40 feet what a normal person sees at 20 feet
B.The patient can see at 20 feet what a normal person sees at 40 feet
C.The patient has 40% of normal vision
D.The patient needs a +4.00 D lens correction
Explanation: A Snellen acuity of 20/40 means the patient must be at 20 feet to read what a person with normal vision can read at 40 feet. The numerator is the testing distance and the denominator is the distance at which a normal eye can read the same line. This indicates reduced visual acuity compared to 20/20.
3Which instrument is used to measure intraocular pressure (IOP)?
A.Phoropter
B.Tonometer
C.Keratometer
D.Lensometer
Explanation: A tonometer measures intraocular pressure, which is essential for glaucoma screening and management. Common types include Goldmann applanation, non-contact (air puff), and Tono-Pen. The phoropter is used for refraction, the keratometer measures corneal curvature, and the lensometer measures lens power.
4What topical anesthetic is most commonly used before Goldmann applanation tonometry?
A.Tetracaine
B.Proparacaine
C.Lidocaine
D.Bupivacaine
Explanation: Proparacaine 0.5% is the most commonly used topical anesthetic in ophthalmology due to its rapid onset (within 20 seconds), short duration, and minimal stinging. It is typically combined with fluorescein dye for Goldmann applanation tonometry. Tetracaine is an alternative but causes more stinging.
5The notation 'OD' refers to which eye?
A.Left eye
B.Right eye
C.Both eyes
D.Neither eye
Explanation: OD stands for 'oculus dexter,' the Latin term for right eye. OS (oculus sinister) refers to the left eye, and OU (oculi uterque) refers to both eyes. These abbreviations are fundamental to ophthalmic documentation and must be used correctly to prevent errors in treatment.
6Which type of visual field test uses a bowl-shaped perimeter with a single stimulus of varying intensity?
A.Confrontation visual field
B.Tangent screen
C.Automated static perimetry
D.Goldmann kinetic perimetry
Explanation: Automated static perimetry (such as the Humphrey Visual Field Analyzer) uses a bowl-shaped perimeter and presents stimuli of varying intensity at fixed locations to map the visual field. Goldmann perimetry uses moving targets (kinetic), confrontation is a gross screening method, and the tangent screen tests the central 30 degrees using a flat surface.
7What is the normal range for intraocular pressure?
A.5-10 mmHg
B.10-21 mmHg
C.22-30 mmHg
D.30-40 mmHg
Explanation: Normal intraocular pressure ranges from 10-21 mmHg, with an average of approximately 15-16 mmHg. Pressures above 21 mmHg are considered elevated and may indicate glaucoma risk, though some patients develop glaucoma at normal pressures (normal-tension glaucoma) and others tolerate higher pressures without damage.
8A lensometer is used to measure which of the following?
A.Corneal curvature
B.The power of a spectacle lens
C.Intraocular pressure
D.Pupil diameter
Explanation: A lensometer (also called a lensmeter or vertometer) measures the power of a spectacle lens, including sphere, cylinder, axis, prism, and optical center. This measurement is essential for verifying prescriptions and documenting a patient's current correction. Corneal curvature is measured with a keratometer.
9Which dye is used in conjunction with a cobalt blue light to evaluate corneal abrasions?
A.Rose bengal
B.Fluorescein sodium
C.Indocyanine green
D.Lissamine green
Explanation: Fluorescein sodium is a water-soluble dye that stains areas of epithelial disruption and is viewed under cobalt blue light. It pools in corneal defects (abrasions, ulcers) creating a bright green fluorescence. Rose bengal and lissamine green stain devitalized cells, while indocyanine green is used for choroidal angiography.
10What does a keratometer measure?
A.Anterior chamber depth
B.Corneal curvature
C.Lens thickness
D.Axial length of the eye
Explanation: A keratometer measures the curvature of the central cornea (approximately the central 3 mm). The readings, expressed in diopters or millimeters of radius, are used to fit contact lenses, calculate IOL power, and detect corneal astigmatism. Axial length is measured by A-scan ultrasonography.

About the COT Exam

The COT exam certifies ophthalmic technicians in advanced clinical skills including refractometry, tonometry, visual fields, OCT imaging, fundus photography, surgical assisting, and patient care. Building on COA-level competencies, COT certification demonstrates proficiency across the full scope of ophthalmic technology. COTs work in ophthalmology offices, surgical centers, hospitals, and research institutions, performing diagnostic testing and assisting with ophthalmic procedures.

Assessment

200 multiple-choice (170 scored + 30 pretest)

Time Limit

3 hours

Passing Score

Scaled passing score (criterion-referenced)

Exam Fee

$250 application fee (IJCAHPO / Prometric Testing Centers)

COT Exam Content Outline

~10%

History Taking and Documentation

Patient history, chief complaint, ocular/medical history, documentation standards, ophthalmic terminology, and HIPAA compliance.

~15%

Visual Assessment

Snellen and alternative acuity testing, color vision (Ishihara), contrast sensitivity, pupil testing (RAPD), Amsler grid, and visual field screening.

~15%

Refractometry and Lensometry

Autorefraction, retinoscopy, phoropter operation, Jackson cross cylinder, lensometer neutralization, keratometry, and spectacle verification.

~10%

Ocular Motility and Binocular Vision

Cover test, alternate cover test, NPC, extraocular muscle assessment, strabismus measurement, Worth 4-dot, and stereopsis testing.

~20%

Diagnostic Testing and Imaging

Goldmann and non-contact tonometry, pachymetry, automated perimetry, OCT (macular and RNFL), fundus photography, A-scan biometry, and slit lamp biomicroscopy.

~15%

Ophthalmic Patient Care and Pharmacology

Mydriatics, cycloplegics, topical anesthetics, glaucoma medications, drop instillation technique, infection control, ocular anatomy, and patient education.

~15%

Surgical Assisting

Cataract surgery setup, sterile technique, instrument preparation, IOL calculations (SRK/T, IOL Master), and postoperative care assistance.

How to Pass the COT Exam

What You Need to Know

  • Passing score: Scaled passing score (criterion-referenced)
  • Assessment: 200 multiple-choice (170 scored + 30 pretest)
  • Time limit: 3 hours
  • Exam fee: $250 application fee

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

COT Study Tips from Top Performers

1Focus heavily on diagnostic testing — it accounts for roughly 20% of the exam. Master Goldmann applanation tonometry technique, automated perimetry reliability indices, and OCT interpretation for both macular and glaucoma applications.
2Know your ophthalmic pharmacology cold: mydriatics (tropicamide, phenylephrine), cycloplegics (cyclopentolate, atropine), topical anesthetics (proparacaine), and glaucoma medications (timolol, latanoprost, brimonidine) — mechanisms, uses, and side effects.
3Practice lensometer neutralization: know the proper sequence (sphere first, then cylinder), how to read axis, and how to identify prism. This is a hands-on skill that translates directly to exam questions.
4Understand IOL calculation concepts: axial length measurement (A-scan vs. IOL Master), keratometry, and how these inputs feed into formulas like SRK/T. Know which measurements are critical and how errors affect outcomes.
5Do not neglect motility and binocular vision — cover test interpretation, extraocular muscle actions, cranial nerve innervation (SO4-LR6-rest3), and NPC testing are high-yield topics.

Frequently Asked Questions

What is the COT exam?

The COT (Certified Ophthalmic Technician) exam is a certification offered by IJCAHPO for ophthalmic personnel who have progressed beyond the COA level. It tests advanced clinical skills in refractometry, tonometry, visual fields, imaging, and surgical assisting. The exam has 200 multiple-choice questions completed in 3 hours.

What are the prerequisites for the COT exam?

To be eligible for the COT exam, you must hold a current COA certification, have at least 1 year of full-time ophthalmic clinical experience, and complete an IJCAHPO-approved training program or meet equivalent education and experience requirements.

How much does the COT exam cost?

The COT exam application fee is $250. Additional costs may include study materials ($100-$400) and CE credits for recertification (18 Group A credits every 3 years).

What topics are covered on the COT exam?

The COT exam covers visual assessment, refractometry and lensometry, diagnostic testing (tonometry, visual fields, OCT, photography), ocular motility, ophthalmic pharmacology, patient care, surgical assisting, and documentation. Diagnostic testing is the largest content area.

How do I maintain my COT certification?

COT certification is valid for 3 years. To recertify, you must earn 18 continuing education credits in IJCAHPO-approved Group A categories and submit a recertification application before expiration.