Certified Orthoptist (CO) Certification Exam — Questions and Answers

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

Prevents light from entering both eyes
Strengthens binocular vision
Blurs the better-seeing eye (Correct answer)
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: What is the primary goal in managing strabismus?

Reduce intraocular pressure
Improve peripheral vision
Restore binocular alignment (Correct answer)
Enhance color perception

Correct answer: Restore binocular alignment

The primary goal in managing strabismus is to restore proper binocular alignment of the eyes. This not only improves the cosmetic appearance but, more importantly, aims to establish or restore binocular vision (the ability of both eyes to work together to create a single, three-dimensional image). Achieving alignment helps prevent amblyopia and improves visual function.

Question 3: At the optic chiasm, which fibers decussate (cross) to the opposite side?

No fibers cross at the chiasm
All retinal fibers
Temporal retinal fibers
Nasal retinal fibers (Correct answer)

Correct answer: Nasal retinal fibers

Nasal retinal fibers, which carry temporal visual field information, cross at the optic chiasm, while temporal retinal fibers remain ipsilateral.

Question 4: The visual pathway travels from the retina to the primary visual cortex located in which brain lobe?

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

Correct answer: Occipital lobe

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

Question 5: At what age is amblyopia treatment most effective?

After age 15
Any age
Only in infants under 1
Before age 7 (Correct answer)

Correct answer: Before age 7

Amblyopia treatment is most effective when initiated early in childhood, ideally before the age of 7 or 8. The visual system is still developing during this critical period, making it more responsive to interventions like patching or atropine penalization. Treatment success significantly decreases after this age as the visual pathways become less plastic.

Question 6: What is a CO professional's obligation regarding confidentiality?

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

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 7: What does residual risk mean in CO practice?

Risk affecting waste materials
Risk remaining after all controls are implemented (Correct answer)
Initial risk before assessment
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 8: Which of the following is a symptom of poor binocular vision?

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

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

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

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 10: What are record retention policies in CO practice?

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

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 11: Which cranial nerve innervates the superior oblique muscle?

CN V (Trigeminal)
CN IV (Trochlear) (Correct answer)
CN VI (Abducens)
CN III (Oculomotor)

Correct answer: CN IV (Trochlear)

The trochlear nerve (CN IV) exclusively innervates the superior oblique muscle, making it the only cranial nerve to exit from the dorsal brainstem.

Question 12: The Worth 4-dot test uses which colors to assess binocular fusion?

Red, green, and white (Correct answer)
Red, green, blue, white
Green, white, and yellow
Blue, yellow, and red

Correct answer: Red, green, and white

The Worth 4-dot test uses two green dots, one red dot, and one white dot, viewed through red-green glasses to assess binocular fusion.

Question 13: What is a risk matrix used for in CO practice?

Creating task schedules
Evaluating risks by plotting likelihood against impact severity (Correct answer)
Tracking attendance
Mapping facility layouts

Correct answer: Evaluating risks by plotting likelihood against impact severity

A risk matrix plots probability against consequences to prioritize which risks need immediate attention.

Question 14: What is a key component of professional behavior in clinical practice?

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

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 15: What is optic neuritis commonly associated with?

Macular degeneration
Cataracts
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 16: Which test measures a patient’s ability to maintain binocular vision under stress?

Color vision test
Prism bar vergence test (Correct answer)
Cover-uncover test
Visual acuity 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 17: 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 18: An orthotist learns during a fitting that a patient is experiencing domestic abuse. The MOST appropriate action is to:

Ignore the information to preserve the therapeutic relationship
Provide information about resources and follow mandatory reporting laws where applicable (Correct answer)
Document nothing to avoid legal liability
Immediately contact law enforcement without informing the patient

Correct answer: Provide information about resources and follow mandatory reporting laws where applicable

Practitioners have an ethical duty to connect patients with resources and comply with mandatory reporting laws while maintaining a supportive approach.

Question 19: What is a work breakdown structure in CO practice?

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

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 20: Deprivation amblyopia, caused by conditions such as congenital cataracts, is the MOST severe form because:

It completely deprives the visual cortex of form vision during the critical period (Correct answer)
It only occurs in bilateral cases
It affects only the peripheral visual field
It is easily reversed with patching alone

Correct answer: It completely deprives the visual cortex of form vision during the critical period

Deprivation amblyopia is most severe because form vision is completely blocked during the critical sensitive period, causing profound cortical underrepresentation.

Question 21: Which vision screening approach does the American Academy of Pediatrics recommend for children aged 3–5 years?

Cover-uncover test only
Near card testing alone
Photoscreening or autorefraction (Correct answer)
Distance Snellen acuity chart only

Correct answer: Photoscreening or autorefraction

The AAP recommends photoscreening or autorefraction for children aged 3–5 years, as these instrument-based methods are reliable in young, pre-cooperative children.

Question 22: Which test assesses contrast sensitivity in visual function testing?

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

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 23: Which condition is NOT considered an amblyopia risk factor?

Ptosis covering the visual axis
Significant anisometropia
Bilateral symmetric myopia of equal magnitude (Correct answer)
Esotropia

Correct answer: Bilateral symmetric myopia of equal magnitude

Bilateral symmetric myopia does not create unequal visual input between the eyes, so it is not an amblyopia risk factor.

Question 24: What is the function of the superior oblique muscle in eye movement?

Retracts the eye
Abducts the eye
Depresses and intorts the eye (Correct answer)
Elevates the eye

Correct answer: Depresses and intorts the eye

The superior oblique muscle is one of the extraocular muscles responsible for eye movement. Its primary actions are depression (moving the eye downwards) and intorsion (rotating the top of the eye inward towards the nose). It also has a secondary action of abduction (moving the eye outwards).

Question 25: What is the most common type of strabismus in children?

Hypertropia
Exotropia
Hypotropia
Esotropia (Correct answer)

Correct answer: Esotropia

Esotropia, an inward turning of one or both eyes, is the most common type of strabismus found in children. It can be constant or intermittent and often presents early in life. Early detection and treatment are crucial to prevent amblyopia and ensure proper visual development.

Question 26: Which test is most appropriate for assessing visual acuity in a non-verbal 2-year-old child?

Snellen chart
Landolt C rings
LogMAR 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 27: A patient explicitly refuses to pay for services rendered. An orthotist may ethically:

Publicly post the patient's name on the clinic website as a warning to others
Pursue standard collection procedures while maintaining patient dignity (Correct answer)
Withhold the completed device indefinitely as leverage
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 28: The Amsler grid is used to assess which visual function?

Color vision deficiencies
Extraocular motility range
Stereoacuity thresholds
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 29: Which extraocular muscle is responsible for primary abduction of the eye?

Inferior oblique
Medial rectus
Lateral rectus (Correct answer)
Superior oblique

Correct answer: Lateral rectus

The lateral rectus, innervated by cranial nerve VI (abducens), is the primary abductor of the eye.

Question 30: Which low vision device uses a strong convex lens resting on reading material to magnify near objects?

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

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

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

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

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

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 33: What is evidence-based practice in CO Pharmacology & Medication Management?

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

Correct answer: Integrating research evidence with expertise and client needs

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

Question 34: The null point in congenital nystagmus is the gaze position where nystagmus intensity is minimized, which often explains why a child adopts:

A convergence posture at near only
A head turn or tilt (anomalous head posture) (Correct answer)
Alternating fixation preference
Increased blink rate

Correct answer: A head turn or tilt (anomalous head posture)

Children with nystagmus adopt an anomalous head posture to place their eyes at the null point, thereby minimizing the nystagmus and maximizing visual acuity.

Question 35: Which of the following is considered a clinical procedure in orthoptics?

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

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

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

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

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

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 38: What is the primary treatment for amblyopia in young children?

Laser therapy
Corneal transplant
Cataract surgery
Occlusion therapy (patching) (Correct answer)

Correct answer: Occlusion therapy (patching)

Occlusion therapy, commonly known as patching, is the primary and most effective treatment for amblyopia in young children. It involves covering the stronger, better-seeing eye for a prescribed period each day, forcing the brain to use and develop the vision in the weaker, amblyopic eye. This stimulates the visual pathways and helps improve visual acuity.

Question 39: Which layer of the retina contains the cell bodies of the photoreceptors?

Outer nuclear layer (Correct answer)
Inner nuclear layer
Ganglion cell layer
Retinal pigment epithelium

Correct answer: Outer nuclear layer

The outer nuclear layer contains the nuclei (cell bodies) of both rod and cone photoreceptors.

Question 40: The cover-uncover test specifically detects:

Manifest strabismus (tropia) (Correct answer)
Suppression depth
Latent deviation (phoria)
Stereoacuity loss

Correct answer: Manifest strabismus (tropia)

The cover-uncover test detects manifest strabismus (tropia) by observing movement of the uncovered eye when the fellow eye is covered.

Question 41: What role do standard operating procedures play in CO Patient Assessment & Evaluation?

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

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 42: What condition is characterized by sudden, painless vision loss and a pale retina with a cherry-red spot?

Retinal detachment
Optic neuritis
CRAO (Correct answer)
Glaucoma

Correct answer: CRAO

Central Retinal Artery Occlusion (CRAO) is a medical emergency caused by a blockage in the central retinal artery, leading to acute ischemia of the inner retina. The sudden, painless vision loss is characteristic, and ophthalmoscopic examination reveals a pale, edematous retina due to lack of blood flow, with a distinct cherry-red spot at the fovea where the choroidal circulation is visible.

Question 43: Nystagmus that is present at birth or develops within the first 6 months is classified as:

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

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 44: Congenital (infantile) esotropia is typically characterized by:

Variable angle that resolves spontaneously
Onset reliably after 6 months of age
Small angle deviation less than 10 PD
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 45: A patient has difficulty converging their eyes. Which condition is most likely?

Hyperopia
Presbyopia
Divergence excess
Convergence insufficiency (Correct answer)

Correct answer: Convergence insufficiency

Convergence insufficiency is a common binocular vision disorder where the eyes have difficulty turning inward (converging) to maintain single vision when viewing near objects. This often leads to symptoms like eye strain, headaches, blurred vision, or double vision during reading or close work. Divergence excess, conversely, involves difficulty converging.

Question 46: Which behavior exemplifies the ethical standard of professional integrity in orthotics practice?

Modifying billing codes to maximize reimbursement
Avoiding peer review to protect proprietary techniques
Providing services beyond the patient's clinical needs to increase revenue
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 47: What is evidence-based practice in CO Patient Assessment & Evaluation?

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

Correct answer: Integrating research evidence with expertise and client needs

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

Question 48: The Hirschberg test is used to estimate:

Stereoacuity
Best-corrected visual acuity
Color vision deficiency
Angle of strabismus (Correct answer)

Correct answer: Angle of strabismus

The Hirschberg test estimates the angle of strabismus by observing the position of the corneal light reflex relative to the pupil center.

Question 49: Which test is commonly used to quantify the angle of deviation in strabismus?

Refraction test
Snellen test
Prism cover test (Correct answer)
Visual field 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 50: Cycloplegic refraction in children is critical for accurate measurement because it:

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

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

To set pricing for professional services
To establish professional conduct standards and guide ethical decision-making (Correct answer)
To determine salary structures
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 52: The purpose of a Bangerter foil in amblyopia management is to:

Apply graded blur to the fellow eye as a penalization method (Correct answer)
Protect the amblyopic eye from bright light
Improve contrast sensitivity in the amblyopic eye directly
Eliminate diplopia in strabismic patients

Correct answer: Apply graded blur to the fellow eye as a penalization method

Bangerter foils are translucent filters applied to the fellow eye's spectacle lens to penalize it with graded blur, encouraging preferential use of the amblyopic eye.

Question 53: What is evidence-based practice in CO Infection Control & Prevention?

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

Correct answer: Integrating research evidence with expertise and client needs

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

Question 54: What is a needs assessment in CO Infection Control & Prevention practice?

Office supply list
Identifying gaps between current conditions and desired outcomes (Correct answer)
Benefits survey
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 55: How does professional liability insurance protect CO practitioners?

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

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 56: According to the CITT study, the most effective evidence-based treatment for convergence insufficiency is:

Patching the dominant eye
Bifocal lenses only
Base-in prism glasses alone
Office-based vision therapy combined with home exercises (Correct answer)

Correct answer: Office-based vision therapy combined with home exercises

The CITT (Convergence Insufficiency Treatment Trial) demonstrated that office-based vision therapy with home reinforcement is superior to home-based exercises alone or prism glasses.

Question 57: How should an orthoptist respond if a pediatric patient is uncooperative during an exam?

Ignore the child’s discomfort
Reschedule the exam immediately
Force the test quickly
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 58: The ABC Code of Ethics requires orthotists to maintain competence through:

Hiring experienced staff only
Annual peer review of all cases
Ongoing continuing education and professional development (Correct answer)
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 59: Eccentric viewing training teaches patients with a central scotoma to:

Use an intact peripheral retinal area as the preferred retinal locus (PRL) (Correct answer)
Ignore the blind area completely
Improve fixation by patching the fellow eye
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 60: A patient's family member calls to ask about the patient's treatment plan. Without patient authorization, the orthotist should:

Decline to disclose protected health information without the patient's consent (Correct answer)
Transfer the call to the billing department to handle
Provide a summary of the treatment but omit the diagnosis
Share details since the family member is clearly supportive

Correct answer: Decline to disclose protected health information without the patient's consent

HIPAA prohibits disclosure of patient PHI to family members or others without explicit patient authorization.

Question 61: A patient requests a copy of their orthotic fitting records to share with another provider. Under HIPAA, the orthotist must:

Obtain written permission from the referring physician first
Deny the request to protect proprietary fitting data
Charge a significant fee to discourage the transfer
Provide the records within a reasonable timeframe as required by law (Correct answer)

Correct answer: Provide the records within a reasonable timeframe as required by law

HIPAA grants patients the right to access and receive copies of their own health records in a timely manner.

Question 62: 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 63: The Brückner test helps detect amblyopia and strabismus by:

Assessing color vision with Ishihara plates
Testing stereopsis with Randot circles
Measuring intraocular pressure binocularly
Comparing the brightness of the red reflex in both eyes simultaneously (Correct answer)

Correct answer: Comparing the brightness of the red reflex in both eyes simultaneously

The Brückner test compares the simultaneous red reflex brightness in both eyes — a brighter or lighter reflex in one eye suggests strabismus or amblyopia.

Question 64: Anisometropic amblyopia most commonly results from:

Intermittent esotropia
Convergence insufficiency
Large, bilateral, symmetric refractive errors
Significantly unequal refractive errors between the two eyes (Correct answer)

Correct answer: Significantly unequal refractive errors between the two eyes

Anisometropic amblyopia results from significantly unequal refractive errors between the two eyes, causing the more ametropic eye to receive a chronically blurred retinal image.

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

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

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: Bioptic telescopes are primarily prescribed to:

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

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

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

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 68: Which action by an orthotist would constitute an ethical breach of professional boundaries?

Charging standard fees for all patients
Recommending a colleague for complex cases
Using evidence-based practice guidelines
Entering into a romantic relationship with a current patient (Correct answer)

Correct answer: Entering into a romantic relationship with a current patient

Romantic relationships with current patients violate professional boundaries and are prohibited by most ethical codes in healthcare.

Question 69: An orthotist realizes mid-treatment that a case exceeds their competency level. The ethical course of action is to:

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

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 70: What is the importance of continuing education for CO professionals in Patient Assessment & Evaluation?

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

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 71: What is scope creep in CO project management?

Reducing deliverables
Uncontrolled scope expansion without adjusting time, cost, or resources (Correct answer)
Incremental feature addition technique
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 72: What is a near-miss report in CO practice?

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

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 73: A patient presents with bitemporal hemianopia. Where is the lesion most likely located?

Optic nerve
Occipital cortex
Lateral geniculate body
Optic chiasm (Correct answer)

Correct answer: Optic chiasm

Bitemporal hemianopia is a visual field defect characterized by loss of vision in the outer (temporal) half of both visual fields. This specific pattern of vision loss occurs when there is damage to the optic chiasm, where the nasal (temporal visual field) fibers from both optic nerves cross. A lesion here interrupts the transmission of information from the temporal visual fields of both eyes.

Question 74: A certified orthotist supervises a non-certified orthotic fitter. If the fitter makes an error resulting in patient harm, who bears professional responsibility?

No one, as errors are expected in training environments
The supervising orthotist shares responsibility for the supervised staff's actions (Correct answer)
The clinic owner bears sole responsibility
Only the fitter, since they performed the service

Correct answer: The supervising orthotist shares responsibility for the supervised staff's actions

The supervising practitioner shares professional and ethical responsibility for the outcomes of those they supervise.

Question 75: Occlusion therapy (patching) for amblyopia in a child is MOST effective when applied to which eye?

The amblyopic eye
Both eyes simultaneously
The fellow (non-amblyopic) eye (Correct answer)
Alternating eyes daily

Correct answer: The fellow (non-amblyopic) eye

Patching the fellow (better-seeing) eye forces use of the amblyopic eye, stimulating visual cortex development and improving acuity in that eye.

Question 76: 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 77: What condition is typically diagnosed using Hirschberg’s test?

Strabismus (Correct answer)
Glaucoma
Amblyopia
Cataract

Correct answer: Strabismus

Hirschberg's test is a quick and simple screening tool used to detect strabismus, or ocular misalignment. It involves observing the reflection of a light source on the patient's corneas. If the light reflex is not symmetrically centered in both pupils, it indicates a deviation in eye alignment, suggesting the presence of strabismus.

Question 78: 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
Maintaining equipment calibration records
Advocacy and interprofessional communication for patient benefit (Correct answer)
Proper billing and coding

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 79: Which finding during pediatric vision screening warrants immediate ophthalmology referral?

White pupillary reflex (leukocoria) (Correct answer)
Small exophoria at near
Mild convergence insufficiency
Low hyperopia of +1.00 D

Correct answer: White pupillary reflex (leukocoria)

Leukocoria (white pupillary reflex) is a red flag that may indicate retinoblastoma, congenital cataract, or other serious pathology requiring immediate evaluation.

Question 80: Which tool helps distinguish between comitant and incomitant strabismus?

Cover-uncover test (Correct answer)
Slit lamp
Pupillometry
Tonometry

Correct answer: Cover-uncover test

The cover-uncover test is crucial for distinguishing between comitant and incomitant strabismus. In comitant strabismus, the angle of deviation remains constant in all gaze positions, while in incomitant strabismus, the angle varies with the direction of gaze, indicating a paretic or restrictive muscle. Observing the eye movements during the cover test in different gaze positions helps identify this difference.

Question 81: When performing retinoscopy, a 'with' motion of the reflex indicates which refractive state?

Astigmatism only
Emmetropia exactly
Myopia beyond the far point
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 82: The critical period for amblyopia treatment is primarily defined by:

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

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

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

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

Online reviews cannot be trusted as marketing tools
It may increase referrals inappropriately
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 85: At what age does visual acuity typically reach adult levels (approximately 20/20) in normally developing children?

8 years
3 years
5–6 years (Correct answer)
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 86: What is the best practice when documenting patient information?

Rely on memory for later entries
Record information accurately and immediately (Correct answer)
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 87: Why is regular review important in CO risk management?

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

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

18 years
5–7 years (Correct answer)
10–12 years
2 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 89: An orthotist discovers that a colleague has been billing Medicare for custom devices but providing prefabricated ones. What is the MOST appropriate first action?

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

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 90: Which refractive error is most closely associated with accommodative esotropia?

Astigmatism
High myopia
Hyperopia (Correct answer)
Anisometropia

Correct answer: Hyperopia

Accommodative esotropia is most commonly associated with uncorrected hyperopia, as excessive accommodation drives convergence and causes esotropia.

Question 91: A keratometer (ophthalmometer) is used to measure which ocular parameter?

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

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

PPE first, then administrative
Insurance, training, documentation
Elimination, substitution, engineering, administrative, then PPE (Correct answer)
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 93: What is a records management audit in CO?

Counting filing cabinets
Reviewing practices to ensure compliance with policies (Correct answer)
Computer usage review
Supplies inventory

Correct answer: Reviewing practices to ensure compliance with policies

This audit examines how records are created, stored, accessed, retained, and destroyed for compliance.

Question 94: What tool is typically used to assess near visual acuity in a clinical setting?

Jaeger chart (Correct answer)
Visual field perimeter
Ishihara plates
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 95: What is the primary ethical responsibility of an orthoptist during patient care?

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

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

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

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

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

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 98: Which of the following is a hallmark sign of Horner’s syndrome?

Proptosis
Mydriasis
Complete ophthalmoplegia
Ptosis and miosis (Correct answer)

Correct answer: Ptosis and miosis

Horner's syndrome results from damage to the sympathetic nerve supply to the eye and face. The classic triad of symptoms includes partial ptosis (drooping of the upper eyelid), miosis (constricted pupil), and anhidrosis (decreased sweating on the affected side of the face). Ptosis and miosis are the most consistently observed and defining ocular signs.

Question 99: Fresnel press-on prisms incorporated into a spectacle lens are primarily used to manage:

Color vision deficiency
Myopic astigmatism
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 100: Which of the following best defines informed consent?

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

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.

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