Certified Orthoptist (CO) Certification Exam — Questions and Answers

Question 1: How does atropine penalization work in amblyopia treatment?

Blurs the better-seeing eye (Correct answer)
Strengthens binocular vision
Prevents light from entering both eyes
Dilates the amblyopic eye to rest it

Correct answer: Blurs the better-seeing eye

Atropine penalization is a treatment for amblyopia that involves instilling atropine eye drops into the better-seeing eye. Atropine dilates the pupil and paralyzes the ciliary muscle, blurring the vision in that eye. This forces the brain to rely more on the amblyopic (weaker) eye, thereby stimulating its visual development, similar to the effect of patching.

Question 2: Eccentric viewing training teaches patients with a central scotoma to:

Improve fixation by patching the fellow eye
Use an intact peripheral retinal area as the preferred retinal locus (PRL) (Correct answer)
Ignore the blind area completely
Read exclusively with high-power magnification

Correct answer: Use an intact peripheral retinal area as the preferred retinal locus (PRL)

Eccentric viewing training helps patients with central scotoma develop a preferred retinal locus in intact peripheral retina as a functional substitute for the damaged fovea.

Question 3: How should an orthoptist handle a patient complaint about discomfort during an exam?

Blame another staff member
Dismiss the concern
Ignore and continue the exam
Listen and respond with empathy (Correct answer)

Correct answer: Listen and respond with empathy

When a patient expresses discomfort, it is essential for an orthoptist to stop, listen attentively, and respond with empathy. Acknowledging their feelings, explaining the procedure, and making adjustments if possible helps to build trust, alleviate anxiety, and ensure the patient feels heard and respected.

Question 4: What is the primary ethical responsibility of an orthoptist during patient care?

Follow patient preferences without question
Ensure patient confidentiality (Correct answer)
Maximize clinic revenue
Only follow physician directions

Correct answer: Ensure patient confidentiality

Patient confidentiality is a fundamental ethical and legal principle in healthcare, ensuring that sensitive patient information is protected and not disclosed without consent. Orthoptists, like all healthcare professionals, have a primary responsibility to maintain the privacy and security of patient data, fostering trust and respecting patient autonomy.

Question 5: Which instrument measures stereoacuity using random dot patterns without monocular cues?

TNO test (Correct answer)
Frisby test
Titmus fly test
Lang stereotest

Correct answer: TNO test

The TNO test uses random-dot anaglyphic plates that eliminate all monocular cues, making it a true test of stereoscopic depth perception.

Question 6: How does professional liability insurance protect CO practitioners?

Covering financial losses from claims of negligence or errors (Correct answer)
Paying health premiums
Protecting against equipment theft
Covering disaster damage

Correct answer: Covering financial losses from claims of negligence or errors

This insurance covers financial consequences of claims alleging negligence or mistakes in professional services.

Question 7: Compared to hand magnifiers, spectacle-mounted magnifiers offer the primary advantage of:

Hands-free use for sustained near tasks (Correct answer)
No adaptation period required
Lower cost and portability
Greater working distance from the page

Correct answer: Hands-free use for sustained near tasks

Spectacle-mounted magnifiers provide hands-free magnification, allowing patients to use both hands freely for near tasks such as reading or craftwork.

Question 8: Which test uses a graded prism bar to measure the fusional vergence range?

Maddox rod test
Near point of convergence test
Prism bar vergence testing (Correct answer)
Randot stereopsis test

Correct answer: Prism bar vergence testing

Prism bar vergence testing uses a prism bar with increasing prism values to measure positive and negative fusional vergence amplitudes.

Question 9: What is peer review in CO Infection Control & Prevention?

Creating competition
Determining promotions
Quality evaluation by qualified colleagues for improvement (Correct answer)
Reducing workloads

Correct answer: Quality evaluation by qualified colleagues for improvement

Peer review provides objective assessment by qualified professionals to identify improvements and ensure accountability.

Question 10: Which of the following is considered a clinical procedure in orthoptics?

Tympanic temperature reading
Auscultation of chest sounds
Skin allergy testing
Alternate cover test (Correct answer)

Correct answer: Alternate cover test

The alternate cover test is a fundamental orthoptic procedure used to detect and measure the presence and magnitude of a tropia (manifest deviation) or phoria (latent deviation) of the eyes. It directly assesses ocular alignment and binocular vision, making it a core clinical skill for orthoptists.

Question 11: Which instrument uses the principle of fogging one eye to measure the accommodative convergence to accommodation (AC/A) ratio?

von Graefe technique at far only
Worth 4-dot at near only
Gradient method with trial lenses (Correct answer)
Synoptophore

Correct answer: Gradient method with trial lenses

The gradient AC/A method uses lenses (typically +1.00 or -1.00 D) to alter accommodation and measures the resultant change in alignment to calculate the ratio.

Question 12: When providing care to a minor patient, who holds primary decision-making authority for consent?

The referring physician
The parent or legal guardian (Correct answer)
The orthotist based on clinical judgment
The minor patient if they are over age 12

Correct answer: The parent or legal guardian

Parents or legal guardians are legally authorized to provide informed consent for medical treatment of minor children.

Question 13: What is the primary purpose of the cover test in ocular motility assessment?

To assess color vision.
To test pupil reaction to light.
To measure intraocular pressure.
To detect misalignment or latent eye deviations. (Correct answer)

Correct answer: To detect misalignment or latent eye deviations.

The cover test is a fundamental diagnostic tool in orthoptics used to assess ocular alignment. By alternately covering and uncovering each eye, the orthoptist can observe any movement of the uncovered eye, indicating a manifest deviation (strabismus) or a latent deviation (phoria) that is present when binocular fusion is disrupted. This helps identify the presence and type of eye misalignment.

Question 14: The Bagolini striated lens test is used to evaluate which aspect of binocular vision?

Retinal correspondence and suppression (Correct answer)
Accommodative convergence ratio
Distance stereoacuity
Intraocular pressure

Correct answer: Retinal correspondence and suppression

Bagolini striated lenses test retinal correspondence and suppression under near-natural viewing conditions by creating streak images from a point source.

Question 15: What is a key component of professional behavior in clinical practice?

Flexibility in documentation
Demonstrating professionalism and ethics (Correct answer)
Taking shortcuts during exams
Avoiding patient questions

Correct answer: Demonstrating professionalism and ethics

Professionalism and ethics are foundational to clinical practice, encompassing qualities like integrity, respect, accountability, and adherence to ethical guidelines. Demonstrating these attributes ensures high-quality patient care, maintains public trust, and upholds the standards of the orthoptic profession.

Question 16: A patient signs an informed consent form but later claims they did not understand the risks. This situation highlights the importance of:

Filing consent forms in a location inaccessible to patients
Ensuring the patient demonstrates comprehension, not just signature (Correct answer)
Obtaining consent only from licensed physicians
Using only legal boilerplate language in consent forms

Correct answer: Ensuring the patient demonstrates comprehension, not just signature

True informed consent requires confirmed patient understanding of risks and benefits, not merely a signature on a document.

Question 17: A slit lamp biomicroscope allows examination of the anterior segment using which illumination technique to assess corneal edema?

Retroillumination
Direct focal illumination
Sclerotic scatter
Specular reflection (Correct answer)

Correct answer: Specular reflection

Specular reflection from the corneal endothelium reveals cell density and morphology, and disturbance of this pattern indicates corneal edema.

Question 18: What is a CO professional's obligation regarding confidentiality?

Using as marketing material
Protecting client information and disclosing only with authorization or legal requirement (Correct answer)
Discussing cases with family
Sharing freely with other professionals

Correct answer: Protecting client information and disclosing only with authorization or legal requirement

Confidentiality requires protecting all client information from unauthorized disclosure, sharing only with consent or legal mandate.

Question 19: Fresnel press-on prisms incorporated into a spectacle lens are primarily used to manage:

Myopic astigmatism
Color vision deficiency
Diplopia caused by strabismus (Correct answer)
Presbyopia

Correct answer: Diplopia caused by strabismus

Fresnel press-on prisms are used to neutralize diplopia by redirecting the visual axis in patients with strabismus, especially when deviation may change over time.

Question 20: A pharmaceutical company sponsors an orthotist's conference attendance in exchange for presenting favorable product data. This arrangement raises concerns about:

Scope of practice violations
Failure to maintain continuing education credits
Unauthorized practice of medicine
Undisclosed conflicts of interest and biased professional education (Correct answer)

Correct answer: Undisclosed conflicts of interest and biased professional education

Undisclosed industry sponsorships create conflicts of interest that can compromise the integrity of professional education and guidance.

Question 21: A keratometer (ophthalmometer) is used to measure which ocular parameter?

Anterior chamber depth
Axial length
Pupil diameter
Corneal curvature/power (Correct answer)

Correct answer: Corneal curvature/power

A keratometer measures the curvature of the anterior corneal surface, which is essential for contact lens fitting and detecting astigmatism.

Question 22: Base-in prisms are prescribed to relieve symptoms associated with:

Convergence insufficiency or exophoria at near (Correct answer)
Esotropia with diplopia at distance
Vertical strabismus
Hyperphoria

Correct answer: Convergence insufficiency or exophoria at near

Base-in prisms reduce the convergence demand at near and are prescribed to relieve asthenopic symptoms in patients with convergence insufficiency or exophoria.

Question 23: Nystagmus that is present at birth or develops within the first 6 months is classified as:

Spasmus nutans
Latent nystagmus
Acquired nystagmus
Infantile (congenital) nystagmus (Correct answer)

Correct answer: Infantile (congenital) nystagmus

Nystagmus onset within the first 6 months of life is termed infantile or congenital nystagmus and is distinguished from acquired forms by its early onset and typical waveforms.

Question 24: Cycloplegic refraction in children is critical for accurate measurement because it:

Prevents convergence during measurement
Dilates the pupil to allow fundus examination only
Paralyzes accommodation to reveal the full hyperopic error (Correct answer)
Reduces nystagmus during retinoscopy

Correct answer: Paralyzes accommodation to reveal the full hyperopic error

Children exert high levels of accommodation that can mask significant hyperopia; cycloplegia paralyzes the ciliary muscle to allow measurement of the true refractive error.

Question 25: Which neonatal ocular condition can cause permanent severe vision loss if not treated within the first weeks of life?

Congenital cataracts (Correct answer)
Retinopathy of prematurity stage 1
Congenital nasolacrimal duct obstruction
Physiologic neonatal esotropia

Correct answer: Congenital cataracts

Congenital cataracts cause visual deprivation amblyopia and must be treated within the first weeks of life to prevent permanent, severe vision loss.

Question 26: A synoptophore (amblyoscope) is BEST used to assess which of the following?

Binocular vision and fusion (Correct answer)
Corneal curvature
Intraocular pressure
Retinal thickness

Correct answer: Binocular vision and fusion

The synoptophore is a major amblyoscope used to assess, measure, and treat binocular vision disorders including fusion and stereopsis.

Question 27: In a child suspected of having a high AC/A ratio esotropia, which test is MOST useful to confirm the diagnosis?

Comparison of angle at distance vs. near without glasses (Correct answer)
Cycloplegic refraction only
MRI of the orbits
Electrophysiological testing

Correct answer: Comparison of angle at distance vs. near without glasses

Comparing the deviation at distance and near (without near-addition lenses) reveals a significantly larger near esotropia, confirming a high AC/A ratio.

Question 28: Photoscreening devices detect amblyopia risk factors primarily by analyzing which feature?

Red reflex and corneal light reflexes (Correct answer)
Color perception
Fundus appearance
Intraocular pressure

Correct answer: Red reflex and corneal light reflexes

Photoscreening devices analyze the red reflex and corneal light reflections to detect media opacities, significant refractive errors, and strabismus.

Question 29: A child presents with a white pupillary reflex (leukocoria). Which condition is MOST important to rule out immediately?

Retinoblastoma (Correct answer)
Duane syndrome
Accommodative esotropia
Convergence insufficiency

Correct answer: Retinoblastoma

Leukocoria is a red flag sign that must prompt urgent evaluation to exclude retinoblastoma, a life-threatening intraocular malignancy in children.

Question 30: How should an orthoptist respond if a pediatric patient is uncooperative during an exam?

Reschedule the exam immediately
Force the test quickly
Ignore the child’s discomfort
Use reassuring language and involve the parent (Correct answer)

Correct answer: Use reassuring language and involve the parent

Pediatric patients can often be anxious or uncooperative during medical exams. An orthoptist should approach the situation with patience and empathy, using reassuring language to calm the child and involving the parent or guardian to help facilitate cooperation and comfort. This approach builds trust and often leads to a more successful examination.

Question 31: What is the critical path in CO project scheduling?

The shortest route to complete cheaply
The longest sequence of dependent tasks determining minimum duration (Correct answer)
The most expensive phase
Tasks that can be skipped

Correct answer: The longest sequence of dependent tasks determining minimum duration

The critical path identifies the longest chain of dependent tasks; delays on these directly delay project completion.

Question 32: The ABC Code of Ethics requires orthotists to maintain competence through:

Annual peer review of all cases
Ongoing continuing education and professional development (Correct answer)
Hiring experienced staff only
Limiting practice to procedures performed more than 100 times

Correct answer: Ongoing continuing education and professional development

The ABC Code of Ethics mandates that practitioners maintain and expand competence through continuing education throughout their career.

Question 33: What is the primary purpose of a code of ethics in CO practice?

To determine salary structures
To establish professional conduct standards and guide ethical decision-making (Correct answer)
To set pricing for professional services
To define standard office hours

Correct answer: To establish professional conduct standards and guide ethical decision-making

A code of ethics provides a framework of professional values and behavioral standards that guides practitioners in ethical decisions while maintaining public trust.

Question 34: When using a prism bar to measure a horizontal deviation, the prism base direction should be oriented in which direction to neutralize an esotropia?

Base-out (Correct answer)
Base-up
Base-in
Base-down

Correct answer: Base-out

Base-out prisms neutralize esotropia by shifting the image toward the deviated eye, allowing the cover-uncover test to show neutralization.

Question 35: Infantile esotropia (congenital esotropia) is defined by onset before which age with what typical characteristics?

6 months; large angle, no significant refractive error (Correct answer)
18 months; variable angle, unilateral
24 months; large angle, high myopia
12 months; small angle, high hyperopia

Correct answer: 6 months; large angle, no significant refractive error

Infantile esotropia presents before 6 months of age with a large, stable angle of deviation and typically normal or low degrees of hyperopia.

Question 36: The principle of non-maleficence most directly applies when an orthotist considers:

Whether the risks of a proposed device or treatment could harm the patient (Correct answer)
How to market services to increase patient volume
Whether to accept a new insurance contract
When to schedule follow-up appointments

Correct answer: Whether the risks of a proposed device or treatment could harm the patient

Non-maleficence requires practitioners to evaluate whether proposed treatments could cause harm before proceeding.

Question 37: What differentiates active from inactive records in CO?

Inactive have no value
Active are digital; inactive are paper
Active are regularly referenced; inactive are retained but rarely accessed (Correct answer)
Active are public; inactive are private

Correct answer: Active are regularly referenced; inactive are retained but rarely accessed

Active records are frequently referenced; inactive ones are retained for legal or historical purposes but rarely needed.

Question 38: Congenital (infantile) esotropia is typically characterized by:

Small angle deviation less than 10 PD
Variable angle that resolves spontaneously
Onset reliably after 6 months of age
Large, constant angle greater than 30 PD (Correct answer)

Correct answer: Large, constant angle greater than 30 PD

Congenital (infantile) esotropia is typically characterized by a large, constant angle of deviation greater than 30 prism diopters present from birth or within the first 6 months.

Question 39: The Hess screen test and the Lee screen test both map the positions of gaze to identify which condition?

Pupillary light reflex defects
Extraocular muscle paresis or restriction (Correct answer)
Convergence insufficiency
Accommodative spasm

Correct answer: Extraocular muscle paresis or restriction

Hess and Lee screen tests plot ocular motility in all nine diagnostic positions of gaze to identify and localize paretic or restricted extraocular muscles.

Question 40: Which situation represents a dual relationship that could compromise professional ethics?

Accepting insurance reimbursement for services
Using standardized outcome measures for all patients
Treating a patient referred by another healthcare provider
Providing orthotic care to a close personal friend (Correct answer)

Correct answer: Providing orthotic care to a close personal friend

Providing clinical care to personal friends creates a dual relationship that can impair professional judgment and objectivity.

Question 41: The visual pathway travels from the retina to the primary visual cortex located in which brain lobe?

Occipital lobe (Correct answer)
Frontal lobe
Temporal lobe
Parietal lobe

Correct answer: Occipital lobe

The primary visual cortex (V1/striate cortex) is located in the occipital lobe, specifically in the calcarine fissure.

Question 42: What is a needs assessment in CO Infection Control & Prevention practice?

Office supply list
Benefits survey
Identifying gaps between current conditions and desired outcomes (Correct answer)
Property appraisal

Correct answer: Identifying gaps between current conditions and desired outcomes

A needs assessment identifies gaps between current performance and desired outcomes to justify improvements.

Question 43: Which low vision device uses a strong convex lens resting on reading material to magnify near objects?

Prism half-glasses
Reverse telescope
Galilean telescope
Stand magnifier (Correct answer)

Correct answer: Stand magnifier

Stand magnifiers use a strong convex lens mounted at a fixed focal distance and rest directly on reading material to provide stable near magnification.

Question 44: What role do standard operating procedures play in CO Pharmacology & Medication Management?

Restricting creativity
Ensuring consistency and quality through documented instructions (Correct answer)
Creating unnecessary paperwork
Satisfying management only

Correct answer: Ensuring consistency and quality through documented instructions

SOPs provide standardized instructions ensuring consistent quality regardless of which qualified person performs the work.

Question 45: What is the best practice when documenting patient information?

Record information accurately and immediately (Correct answer)
Rely on memory for later entries
Use abbreviations only
Wait until the end of the week to document

Correct answer: Record information accurately and immediately

Accurate and immediate documentation is critical in healthcare for patient safety, continuity of care, and legal reasons. Recording information promptly ensures that details are not forgotten or misinterpreted, provides an up-to-date record for all healthcare providers, and supports evidence-based decision-making.

Question 46: A patient explicitly refuses to pay for services rendered. An orthotist may ethically:

Withhold the completed device indefinitely as leverage
Pursue standard collection procedures while maintaining patient dignity (Correct answer)
Publicly post the patient's name on the clinic website as a warning to others
Deny future care for any condition as a penalty

Correct answer: Pursue standard collection procedures while maintaining patient dignity

Practitioners may use standard legal collection processes but must do so without violating patient privacy, dignity, or access to urgent care.

Question 47: The distance Randot stereotest measures stereoacuity at distance using which technology?

Polarized vectograph targets (Correct answer)
Random dot haploscopic slides
Physical depth plates
Anaglyphic red-green filters

Correct answer: Polarized vectograph targets

The distance Randot uses polarized vectograph technology to present disparate images to each eye, testing stereopsis at 3 meters or 10 feet.

Question 48: An orthotist disagrees with a prescription written by a physician but proceeds without discussion to avoid conflict. This approach fails which ethical standard?

Supervision of support staff
Proper billing and coding
Maintaining equipment calibration records
Advocacy and interprofessional communication for patient benefit (Correct answer)

Correct answer: Advocacy and interprofessional communication for patient benefit

Orthotists have an ethical duty to advocate for patients by communicating clinical concerns to referring providers rather than ignoring them.

Question 49: Duane retraction syndrome Type I is characterized by which motility pattern?

Limitation of elevation in adduction only
Limitation of abduction with globe retraction on adduction (Correct answer)
Limitation of adduction with normal abduction
Limitation of both abduction and adduction equally

Correct answer: Limitation of abduction with globe retraction on adduction

Duane Type I presents with limited or absent abduction and globe retraction with narrowing of the palpebral fissure on adduction, due to aberrant CN III innervation of the lateral rectus.

Question 50: At what age does visual acuity typically reach adult levels (approximately 20/20) in normally developing children?

8 years
5–6 years (Correct answer)
3 years
10 years

Correct answer: 5–6 years

Visual acuity typically matures to approximately 20/20 by age 5–6 years in normally developing children.

Question 51: What is optic neuritis commonly associated with?

Cataracts
Macular degeneration
Glaucoma
Multiple sclerosis (Correct answer)

Correct answer: Multiple sclerosis

Optic neuritis is inflammation of the optic nerve, often causing sudden, painful vision loss and reduced color vision. It is strongly associated with multiple sclerosis (MS), as it is frequently the initial symptom or a recurrent manifestation of demyelination in the central nervous system characteristic of MS.

Question 52: Bioptic telescopes are primarily prescribed to:

Allow patients with low vision to meet driving visual acuity requirements (Correct answer)
Treat amblyopia in children
Improve stereoacuity
Eliminate diplopia at near

Correct answer: Allow patients with low vision to meet driving visual acuity requirements

Bioptic telescopes are miniature telescopes mounted superiorly in spectacle lenses that allow patients with low vision to spot-check acuity for driving in states that permit bioptic driving.

Question 53: What is the importance of continuing education for CO professionals in Infection Control & Prevention?

Only for new professionals
Justifying higher fees
Filling time between engagements
Maintaining current knowledge and adapting to industry changes (Correct answer)

Correct answer: Maintaining current knowledge and adapting to industry changes

Continuing education keeps professionals current with developments and best practices while meeting certification requirements.

Question 54: Most pediatric vision screening guidelines recommend referral if visual acuity is worse than which threshold in children aged 3–5 years?

20/50 in either eye
20/40 in either eye (Correct answer)
20/60 in either eye
20/30 in either eye

Correct answer: 20/40 in either eye

Most guidelines recommend referral if best-corrected visual acuity is worse than 20/40 in either eye in children aged 3–5 years.

Question 55: What is a near-miss report in CO practice?

An employee near target
Documentation of an event that could have caused harm but did not (Correct answer)
A near break-even report
A project near deadline

Correct answer: Documentation of an event that could have caused harm but did not

Near-miss reports document events where harm almost occurred, providing data to prevent future incidents.

Question 56: The Amsler grid is used to assess which visual function?

Color vision deficiencies
Stereoacuity thresholds
Extraocular motility range
Central visual field and metamorphopsia (Correct answer)

Correct answer: Central visual field and metamorphopsia

The Amsler grid detects scotomas and distortion (metamorphopsia) in the central 20 degrees of visual field, commonly used to monitor macular disease.

Question 57: Social media use by orthotists raises which primary ethical concern?

It may increase referrals inappropriately
Online reviews cannot be trusted as marketing tools
It is prohibited by all state licensing boards
Posting patient cases without explicit consent violates confidentiality (Correct answer)

Correct answer: Posting patient cases without explicit consent violates confidentiality

Sharing patient cases or photos on social media without written consent violates patient confidentiality and HIPAA regulations.

Question 58: What does residual risk mean in CO practice?

Initial risk before assessment
Risk remaining after all controls are implemented (Correct answer)
Risk affecting waste materials
Budget overrun risk

Correct answer: Risk remaining after all controls are implemented

Residual risk is the level remaining after practical controls are applied. Some is usually accepted as eliminating all risk is rarely feasible.

Question 59: According to Prentice's Rule, the prismatic effect in prism diopters equals:

Lens power squared
Lens power divided by decentration in cm
Lens power in diopters multiplied by decentration in centimeters (Correct answer)
Decentration in mm divided by lens power

Correct answer: Lens power in diopters multiplied by decentration in centimeters

Prentice's Rule states that prismatic effect (Δ) = lens power (D) × decentration (cm), essential for calculating induced prism from decentered lenses.

Question 60: The Worth 4-Dot test primarily assesses:

Stereoacuity in arc seconds
Color vision deficiency
Binocular sensory fusion and suppression (Correct answer)
Contrast sensitivity

Correct answer: Binocular sensory fusion and suppression

The Worth 4-Dot test evaluates binocular sensory fusion and detects suppression or diplopia at distance and near.

Question 61: When performing retinoscopy, a 'with' motion of the reflex indicates which refractive state?

Myopia beyond the far point
Emmetropia exactly
Astigmatism only
Hyperopia or myopia less than working distance (Correct answer)

Correct answer: Hyperopia or myopia less than working distance

A 'with' motion in retinoscopy occurs when the patient's far point is beyond the examiner, indicating hyperopia or myopia less than the working distance correction.

Question 62: What are record retention policies in CO practice?

Keeping everything forever
Rules defining how long records must be kept and when destroyed (Correct answer)
Paper storage only
Destroying records yearly

Correct answer: Rules defining how long records must be kept and when destroyed

Retention policies establish consistent guidelines based on legal requirements and business needs.

Question 63: Which of the following is a surgical treatment for strabismus?

Trabeculectomy
Strabismus muscle surgery (Correct answer)
Laser photocoagulation
Cataract extraction

Correct answer: Strabismus muscle surgery

Strabismus muscle surgery is a common surgical treatment for strabismus. It involves adjusting the length or position of the extraocular muscles that control eye movement to realign the eyes. The goal is to improve ocular alignment, restore binocular vision, and enhance cosmetic appearance.

Question 64: An orthotist realizes mid-treatment that a case exceeds their competency level. The ethical course of action is to:

Bill for the service and document that the patient accepted the risk
Ask the patient to sign a waiver of liability and continue
Proceed anyway to avoid inconveniencing the patient
Refer the patient to a more qualified practitioner and explain why (Correct answer)

Correct answer: Refer the patient to a more qualified practitioner and explain why

Practicing within one's competency is ethically required, and referral is appropriate when clinical demands exceed current skills.

Question 65: When is it ethically permissible to share a patient's protected health information with their employer?

When the patient provides specific written authorization for that disclosure (Correct answer)
Whenever the employer requests it in writing
When the orthotist believes it is in the patient's best interest
When the employer is paying for the treatment

Correct answer: When the patient provides specific written authorization for that disclosure

PHI can only be disclosed to employers when the patient has specifically authorized that release in writing.

Question 66: What tool is typically used to assess near visual acuity in a clinical setting?

Ishihara plates
Jaeger chart (Correct answer)
Visual field perimeter
Snellen chart

Correct answer: Jaeger chart

The Jaeger chart is a common tool used to measure near visual acuity, typically held at a standard reading distance (e.g., 14 inches). It consists of paragraphs of text or numbers in various print sizes, allowing for assessment of a patient's ability to see fine details up close, which is crucial for tasks like reading.

Question 67: An orthotist discovers that a colleague has been billing Medicare for custom devices but providing prefabricated ones. What is the MOST appropriate first action?

Ignore it as it does not affect patient care
Confront the colleague publicly at the next staff meeting
Report the conduct to the appropriate compliance officer or regulatory body (Correct answer)
Notify the patient only and take no further action

Correct answer: Report the conduct to the appropriate compliance officer or regulatory body

Fraudulent billing is a serious ethical and legal violation that must be reported to a compliance officer or regulatory authority.

Question 68: An orthotist notices a pattern of unnecessary referrals from a physician who receives a fee-sharing arrangement. This is prohibited under:

The Stark Law and Anti-Kickback Statute (Correct answer)
OSHA workplace safety regulations
HIPAA Security Rule
Americans with Disabilities Act

Correct answer: The Stark Law and Anti-Kickback Statute

The Stark Law prohibits physician self-referrals for financial gain, and the Anti-Kickback Statute prohibits fee-sharing arrangements that influence referrals.

Question 69: What is document version control in CO?

Printing every draft
Same names for all files
No change tracking
Tracking changes, identifying current versions, and maintaining history (Correct answer)

Correct answer: Tracking changes, identifying current versions, and maintaining history

Version control tracks revisions, identifies current versions, and maintains change history to ensure document integrity.

Question 70: What tool is commonly used to measure eye deviations in prism diopters?

Phoropter
Ophthalmoscope
Prism bar (Correct answer)
Slit lamp

Correct answer: Prism bar

A prism bar is a diagnostic tool consisting of a series of prisms of increasing dioptric power, mounted in a linear fashion. It is commonly used in orthoptics to measure the magnitude of eye deviations (strabismus) and fusional vergence amplitudes, quantifying them in prism diopters. Other tools like the slit lamp, ophthalmoscope, and phoropter serve different diagnostic purposes.

Question 71: What is the correct hand hygiene protocol before examining a patient?

Rinse hands without soap
Wash only if visible dirt is present
Use gloves instead of washing hands
Wash hands for at least 20 seconds (Correct answer)

Correct answer: Wash hands for at least 20 seconds

Proper hand hygiene is the single most effective way to prevent the spread of infections in a healthcare setting. Washing hands thoroughly with soap and water for at least 20 seconds, or using an alcohol-based hand rub, is the standard protocol recommended by health organizations before and after patient contact to ensure patient and practitioner safety.

Question 72: What is the hierarchy of controls in CO risk management?

Insurance, training, documentation
Elimination, substitution, engineering, administrative, then PPE (Correct answer)
PPE first, then administrative
Assessment, planning, implementation

Correct answer: Elimination, substitution, engineering, administrative, then PPE

The hierarchy prioritizes the most effective controls first, from eliminating the hazard to using PPE as last resort.

Question 73: What is a needs assessment in CO Patient Assessment & Evaluation practice?

Office supply list
Benefits survey
Property appraisal
Identifying gaps between current conditions and desired outcomes (Correct answer)

Correct answer: Identifying gaps between current conditions and desired outcomes

A needs assessment identifies gaps between current performance and desired outcomes to justify improvements.

Question 74: How does professional liability insurance protect CO practitioners?

Protecting against equipment theft
Paying health premiums
Covering disaster damage
Covering financial losses from claims of negligence or errors (Correct answer)

Correct answer: Covering financial losses from claims of negligence or errors

This insurance covers financial consequences of claims alleging negligence or mistakes in professional services.

Question 75: Which test is most appropriate for assessing visual acuity in a non-verbal 2-year-old child?

LogMAR chart
Landolt C rings
Snellen chart
Teller Acuity Cards (Correct answer)

Correct answer: Teller Acuity Cards

Teller Acuity Cards use preferential looking to assess grating acuity in preverbal or nonverbal children.

Question 76: What role do standard operating procedures play in CO Infection Control & Prevention?

Restricting creativity
Creating unnecessary paperwork
Ensuring consistency and quality through documented instructions (Correct answer)
Satisfying management only

Correct answer: Ensuring consistency and quality through documented instructions

SOPs provide standardized instructions ensuring consistent quality regardless of which qualified person performs the work.

Question 77: The critical period for visual development, during which amblyopia can be most easily induced or treated, extends approximately until what age?

2 years
5–7 years (Correct answer)
10–12 years
18 years

Correct answer: 5–7 years

The critical period for visual development typically extends to approximately 7–8 years, though some plasticity persists into the early teens.

Question 78: Which test is most appropriate for evaluating visual field defects?

Tonometry
Snellen visual acuity test
Color vision test
Perimetry (Correct answer)

Correct answer: Perimetry

Perimetry, also known as visual field testing, specifically maps out the entire area of vision, including central and peripheral fields. It is designed to detect and quantify areas of vision loss or blind spots (scotomas) that indicate damage to the visual pathway, making it the most appropriate test for evaluating visual field defects.

Question 79: What is a near-miss report in CO practice?

A near break-even report
Documentation of an event that could have caused harm but did not (Correct answer)
An employee near target
A project near deadline

Correct answer: Documentation of an event that could have caused harm but did not

Near-miss reports document events where harm almost occurred, providing data to prevent future incidents.

Question 80: Which test measures a patient’s ability to maintain binocular vision under stress?

Visual acuity test
Cover-uncover test
Prism bar vergence test (Correct answer)
Color vision test

Correct answer: Prism bar vergence test

The prism bar vergence test is specifically designed to measure a patient’s fusional vergence amplitudes, which is their ability to maintain single binocular vision while the eyes converge or diverge. By introducing prisms of increasing strength, the test assesses the limits of the patient's ability to overcome prism-induced diplopia and maintain fusion, thereby indicating their binocular stability under stress.

Question 81: What is scope creep in CO project management?

Uncontrolled scope expansion without adjusting time, cost, or resources (Correct answer)
Incremental feature addition technique
Reducing deliverables
Natural planned growth

Correct answer: Uncontrolled scope expansion without adjusting time, cost, or resources

Scope creep adds requirements without formal evaluation, causing schedule delays and budget overruns.

Question 82: Which behavior exemplifies the ethical standard of professional integrity in orthotics practice?

Providing services beyond the patient's clinical needs to increase revenue
Modifying billing codes to maximize reimbursement
Avoiding peer review to protect proprietary techniques
Accurately documenting all clinical findings even when unfavorable (Correct answer)

Correct answer: Accurately documenting all clinical findings even when unfavorable

Accurate documentation regardless of how it affects reimbursement or perception exemplifies professional integrity.

Question 83: In low vision rehabilitation, 'relative distance magnification' refers to:

Using prisms to expand the visual field
Using a telescope to magnify distant objects
Increasing ambient illumination to improve contrast
Moving the object closer to the eye to increase its retinal image size (Correct answer)

Correct answer: Moving the object closer to the eye to increase its retinal image size

Relative distance magnification refers to bringing an object closer to the eye to enlarge its retinal image size without using any optical device.

Question 84: The magnification needed for a low vision patient is estimated by the formula:

Required magnification = current VA denominator ÷ desired VA denominator
Required magnification = lens power × working distance
Required magnification = 1 ÷ current VA in decimal
Required magnification = desired VA denominator ÷ current VA denominator (Correct answer)

Correct answer: Required magnification = desired VA denominator ÷ current VA denominator

The required magnification equals the desired visual acuity denominator divided by the current visual acuity denominator (e.g., 20/200 needing 20/40 requires 200/40 = 5× magnification).

Question 85: Which of the following best defines informed consent?

A witness signature for patient procedures
Patient's understanding and voluntary agreement to treatment (Correct answer)
Consent obtained from insurance providers
A verbal agreement with the doctor

Correct answer: Patient's understanding and voluntary agreement to treatment

Informed consent is a crucial ethical and legal process where a patient receives all necessary information about a proposed treatment or procedure, including its risks, benefits, alternatives, and prognosis. The patient must then voluntarily agree to the treatment after fully understanding this information, demonstrating their autonomy in healthcare decisions.

Question 86: Which test assesses contrast sensitivity in visual function testing?

Snellen chart
Ishihara test
Pelli-Robson chart (Correct answer)
Amsler grid

Correct answer: Pelli-Robson chart

The Pelli-Robson chart is specifically designed to measure contrast sensitivity, which is the ability to distinguish between an object and its background. Unlike Snellen charts that measure high-contrast visual acuity, the Pelli-Robson chart presents letters of decreasing contrast, providing a more comprehensive assessment of visual function, especially in conditions affecting the optic nerve or retina.

Question 87: The AAPOS guidelines recommend that vision screening in children should begin at which age?

1 year
5 years
6 months
3 years (Correct answer)

Correct answer: 3 years

AAPOS and AAP guidelines recommend that all children have a vision screening at age 3 years, when cooperation allows photo-screening or acuity testing.

Question 88: A patient with homonymous hemianopia may benefit from which optical device to improve awareness of the blind hemifield?

High-add reading glasses
Sector prism or mirror placed on the hemianopic side (Correct answer)
Tinted lenses
Reverse telescope (minifier)

Correct answer: Sector prism or mirror placed on the hemianopic side

Sector prisms or Fresnel prisms placed on the hemianopic side of spectacles redirect images from the blind hemifield into the seeing field to alert the patient to objects.

Question 89: Which of the following conditions is most likely to result in amblyopia if left untreated?

Presbyopia
Strabismus (Correct answer)
Astigmatism
Myopia

Correct answer: Strabismus

Strabismus, or eye misalignment, is a leading cause of amblyopia if left untreated. When the eyes are misaligned, the brain receives two different images and, to avoid double vision, it suppresses the image from the deviating eye. This prolonged suppression prevents the visual pathway of the deviating eye from developing properly, leading to reduced vision (amblyopia).

Question 90: Photo-screening instruments used in pediatric vision screening primarily detect amblyopia risk factors by analyzing which parameter?

Stereoacuity thresholds
Saccadic eye movement latency
Visual acuity letter recognition
Corneal light reflex symmetry and retinal reflexes (Correct answer)

Correct answer: Corneal light reflex symmetry and retinal reflexes

Photo-screeners analyze corneal light reflexes and the nature of the retinal (red) reflex to detect strabismus, significant refractive error, and media opacities.

Question 91: The Frisby stereotest differs from polarized or anaglyphic stereotests because it:

Requires special glasses for viewing
Uses real depth without any glasses (Correct answer)
Only tests peripheral stereopsis
Measures stereoacuity in arc minutes

Correct answer: Uses real depth without any glasses

The Frisby test presents real physical depth differences using transparent plates of different thicknesses, requiring no special glasses.

Question 92: What is a work breakdown structure in CO practice?

Team member roster
Employee schedule report
Organizational reporting diagram
Hierarchical decomposition of deliverables into manageable work packages (Correct answer)

Correct answer: Hierarchical decomposition of deliverables into manageable work packages

A WBS breaks total scope into progressively smaller components for easier estimation, scheduling, and tracking.

Question 93: What is peer review in CO Pharmacology & Medication Management?

Reducing workloads
Creating competition
Quality evaluation by qualified colleagues for improvement (Correct answer)
Determining promotions

Correct answer: Quality evaluation by qualified colleagues for improvement

Peer review provides objective assessment by qualified professionals to identify improvements and ensure accountability.

Question 94: The critical period for amblyopia treatment is primarily defined by:

Neural plasticity of the visual cortex (Correct answer)
The degree of refractive error
The severity of strabismus
The child's cooperation level

Correct answer: Neural plasticity of the visual cortex

The critical period for amblyopia treatment is defined by the period of neural plasticity in the visual cortex during which visual development can be influenced.

Question 95: Which test is commonly used to quantify the angle of deviation in strabismus?

Prism cover test (Correct answer)
Visual field test
Snellen test
Refraction test

Correct answer: Prism cover test

The prism cover test is the gold standard for quantifying the angle of deviation in strabismus. It combines the cover test with prisms to neutralize the eye's movement. By placing prisms of increasing strength in front of the deviating eye until no movement is observed upon uncovering, the orthoptist can accurately measure the magnitude of the deviation in prism diopters.

Question 96: Which of the following is a symptom of poor binocular vision?

Blurry peripheral vision
Eye twitching
Headache during reading (Correct answer)
Irritation from contact lenses

Correct answer: Headache during reading

Poor binocular vision, such as from convergence insufficiency or uncorrected phorias, often causes symptoms related to eye strain and the effort to maintain single vision. Headaches, especially during prolonged near tasks like reading, are a classic symptom as the eyes struggle to work together efficiently. Other options like eye twitching or blurry peripheral vision are not typically primary symptoms of poor binocular vision.

Question 97: Why is regular review important in CO risk management?

Assessments stay valid forever
Only needed after incidents
Conditions change and new risks emerge requiring updates (Correct answer)
Prohibited more than annually

Correct answer: Conditions change and new risks emerge requiring updates

Regular reviews ensure assessments remain current as conditions change and lessons from incidents are incorporated.

Question 98: What role do standard operating procedures play in CO Patient Assessment & Evaluation?

Satisfying management only
Creating unnecessary paperwork
Ensuring consistency and quality through documented instructions (Correct answer)
Restricting creativity

Correct answer: Ensuring consistency and quality through documented instructions

SOPs provide standardized instructions ensuring consistent quality regardless of which qualified person performs the work.

Question 99: What is evidence-based practice in CO Infection Control & Prevention?

Using newest unproven methods
Integrating research evidence with expertise and client needs (Correct answer)
Doing whatever clients request
Following intuition only

Correct answer: Integrating research evidence with expertise and client needs

Evidence-based practice combines research, expertise, and client preferences for optimal outcomes.

Question 100: Why is regular review important in CO risk management?

Conditions change and new risks emerge requiring updates (Correct answer)
Assessments stay valid forever
Only needed after incidents
Prohibited more than annually

Correct answer: Conditions change and new risks emerge requiring updates

Regular reviews ensure assessments remain current as conditions change and lessons from incidents are incorporated.

Certified Orthoptist (CO) Certification Exam

The Certified Orthoptist (CO) certification validates an individual's expertise in the diagnosis and non-surgical management of disorders of the eye movements and associated visual problems.

100

Questions

180 min

Time Limit

70%

To Pass

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These practice questions were written with AI tools. They are not real exam questions. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

pearsonvue.com — Eligibility, test dates · verified Oct 2026
americanorthopticcouncil.org — Test delivery, score validity, eligibility, retake policy, fees, late registration, registration deadline, renewal, exam information · verified Oct 2026