Test Bank 3 for COA - Certified
Ophthalmic Assistant Newest Prep with
275 Latest Questions and Correct
Answers with Rationales / COA Latest
Exam / Certified Ophthalmic Assistant
DOMAIN 1: HISTORY AND DOCUMENTATION (Questions 1-
18)
DOMAIN 2: VISUAL ASSESSMENT (Questions 9-20)
9. When measuring visual acuity using a Snellen chart, the patient can read the
20/40 line with the right eye. What does this result indicate?
• A. The patient sees at 40 feet what a normal eye sees at 20 feet
• B. The patient sees at 20 feet what a normal eye sees at 40 feet
• C. The patient has 40% of normal vision
• D. The patient needs a +4.00 diopter correction
Rationale: In Snellen notation, the numerator represents the testing distance (20 feet)
and the denominator represents the distance at which a person with normal vision can
read that line. A 20/40 result means the patient must be at 20 feet to read what a
normal eye can read at 40 feet .
10. A patient with 20/200 visual acuity at distance can read 20/40 at near with a
+2.00 add. Which is the patient's functional visual acuity?
• A. 20/200
• B. 20/40 with correction
• C. The best-corrected visual acuity
• D. The near vision only
,Rationale: Visual acuity should be measured and recorded as best corrected, both at
distance and near.
11. A patient has difficulty reading the Snellen chart and squints, but when
looking through a pinhole, visual acuity improves. This suggests:
• A. The patient is malingering
• B. A refractive error is the cause of reduced vision
• C. The patient has a cataract
• D. The patient has optic nerve damage
Rationale: Pinhole testing improves vision when refractive error is the cause. If vision
does not improve with pinhole, the etiology may be optic nerve or macular disease.
12. Visual acuity testing in a pre-school child is BEST performed using which
method?
• A. Snellen chart
• B. Tumbling E
• C. Allen or LEA picture cards
• D. Jaeger reading card
Rationale: Picture-based tests (Allen cards or LEA symbols) are most suitable for
children who cannot yet identify letters.
13. A patient states, "I see a dark curtain coming down over my vision." This
symptom is most consistent with:
• A. Migraine
• B. Floaters
• C. Cataract
• D. Retinal detachment
Rationale: A "curtain" or "shade" coming down over the visual field is a classic symptom
of retinal detachment.
14. When performing a confrontational visual field test, what should the assistant
ask the patient?
• A. "How many fingers do you see?"
• B. "Is the wiggle/light seen at the same time on both sides?"
• C. "What color is the object?"
• D. "Is it bright or dim?"
,Rationale: Confrontation fields compare the patient's visual field to the examiner's. The
patient should indicate whether they see the stimulus on each side and whether it
appears equally bright.
DOMAIN 3: PUPIL ASSESSMENT (Questions 15-25)
15. Which cranial nerve is primarily responsible for the pupillary light reflex?
• A. Cranial nerve IV (trochlear)
• B. Cranial nerve VI (abducens)
• C. Cranial nerve II (optic) and cranial nerve III (oculomotor)
• D. Cranial nerve V (trigeminal)
Rationale: The pupillary light reflex has an afferent limb via CN II (optic nerve) and an
efferent limb via CN III (oculomotor nerve), which innervates the iris sphincter muscle .
16. A relative afferent pupillary defect (RAPD) is best detected using which
technique?
• A. Direct pupil response to light in each eye independently
• B. The swinging flashlight test comparing both eyes
• C. Measurement of pupil size in dim illumination
• D. Instillation of pilocarpine drops and observing constriction
Rationale: The swinging flashlight test is the standard method to detect an RAPD
(Marcus Gunn pupil) by comparing the pupillary response of each eye .
17. A 35-year-old patient has a 4mm pupil that does not react to light but
constricts with accommodation. This condition is MOST consistent with:
• A. CN III palsy
• B. Horner syndrome
• C. Adie's tonic pupil
• D. Argyll Robertson pupil
Rationale: Adie's pupil is a condition of the ciliary ganglion or short ciliary nerves,
causing a dilated pupil with light-near dissociation.
, 18. A small, irregular pupil that reacts to accommodation but not light (Argyll
Robertson pupil) is most commonly associated with:
• A. Diabetes mellitus
• B. Multiple sclerosis
• C. Ocular trauma
• D. Neurosyphilis
Rationale: Argyll Robertson pupils (small, irregular, light-near dissociation) are
classically associated with tertiary syphilis, though they can occur in other conditions.
19. To test the near response of the pupils, the assistant should ask the patient to:
• A. Look at a distant target
• B. Look at a near target, such as their thumb, about 30-40 cm away
• C. Close their eyes
• D. Look up and down
Rationale: The near response is tested by having the patient fixate on a near target
(accommodative target), which elicits convergence, accommodation, and pupillary
constriction.
20. A patient with a III cranial nerve palsy will typically present with which
pupillary finding?
• A. A dilated, non-reactive pupil
• B. A constricted pupil
• C. Normal pupil reaction
• D. Anisocoria that worsens in dim light
Rationale: A complete CN III palsy involves the parasympathetic fibers running in the
outer portion of the nerve, causing a dilated, poorly reactive pupil. This is a sign that
should be evaluated for possible aneurysm, especially in an acute presentation.
21. A patient is found to have a pupil difference of 2 mm in dim light that
becomes less obvious in bright light. This is MOST consistent with:
• A. Anisocoria in bright light
• B. Physiologic anisocoria
• C. Horner syndrome
• D. III nerve palsy
Ophthalmic Assistant Newest Prep with
275 Latest Questions and Correct
Answers with Rationales / COA Latest
Exam / Certified Ophthalmic Assistant
DOMAIN 1: HISTORY AND DOCUMENTATION (Questions 1-
18)
DOMAIN 2: VISUAL ASSESSMENT (Questions 9-20)
9. When measuring visual acuity using a Snellen chart, the patient can read the
20/40 line with the right eye. What does this result indicate?
• A. The patient sees at 40 feet what a normal eye sees at 20 feet
• B. The patient sees at 20 feet what a normal eye sees at 40 feet
• C. The patient has 40% of normal vision
• D. The patient needs a +4.00 diopter correction
Rationale: In Snellen notation, the numerator represents the testing distance (20 feet)
and the denominator represents the distance at which a person with normal vision can
read that line. A 20/40 result means the patient must be at 20 feet to read what a
normal eye can read at 40 feet .
10. A patient with 20/200 visual acuity at distance can read 20/40 at near with a
+2.00 add. Which is the patient's functional visual acuity?
• A. 20/200
• B. 20/40 with correction
• C. The best-corrected visual acuity
• D. The near vision only
,Rationale: Visual acuity should be measured and recorded as best corrected, both at
distance and near.
11. A patient has difficulty reading the Snellen chart and squints, but when
looking through a pinhole, visual acuity improves. This suggests:
• A. The patient is malingering
• B. A refractive error is the cause of reduced vision
• C. The patient has a cataract
• D. The patient has optic nerve damage
Rationale: Pinhole testing improves vision when refractive error is the cause. If vision
does not improve with pinhole, the etiology may be optic nerve or macular disease.
12. Visual acuity testing in a pre-school child is BEST performed using which
method?
• A. Snellen chart
• B. Tumbling E
• C. Allen or LEA picture cards
• D. Jaeger reading card
Rationale: Picture-based tests (Allen cards or LEA symbols) are most suitable for
children who cannot yet identify letters.
13. A patient states, "I see a dark curtain coming down over my vision." This
symptom is most consistent with:
• A. Migraine
• B. Floaters
• C. Cataract
• D. Retinal detachment
Rationale: A "curtain" or "shade" coming down over the visual field is a classic symptom
of retinal detachment.
14. When performing a confrontational visual field test, what should the assistant
ask the patient?
• A. "How many fingers do you see?"
• B. "Is the wiggle/light seen at the same time on both sides?"
• C. "What color is the object?"
• D. "Is it bright or dim?"
,Rationale: Confrontation fields compare the patient's visual field to the examiner's. The
patient should indicate whether they see the stimulus on each side and whether it
appears equally bright.
DOMAIN 3: PUPIL ASSESSMENT (Questions 15-25)
15. Which cranial nerve is primarily responsible for the pupillary light reflex?
• A. Cranial nerve IV (trochlear)
• B. Cranial nerve VI (abducens)
• C. Cranial nerve II (optic) and cranial nerve III (oculomotor)
• D. Cranial nerve V (trigeminal)
Rationale: The pupillary light reflex has an afferent limb via CN II (optic nerve) and an
efferent limb via CN III (oculomotor nerve), which innervates the iris sphincter muscle .
16. A relative afferent pupillary defect (RAPD) is best detected using which
technique?
• A. Direct pupil response to light in each eye independently
• B. The swinging flashlight test comparing both eyes
• C. Measurement of pupil size in dim illumination
• D. Instillation of pilocarpine drops and observing constriction
Rationale: The swinging flashlight test is the standard method to detect an RAPD
(Marcus Gunn pupil) by comparing the pupillary response of each eye .
17. A 35-year-old patient has a 4mm pupil that does not react to light but
constricts with accommodation. This condition is MOST consistent with:
• A. CN III palsy
• B. Horner syndrome
• C. Adie's tonic pupil
• D. Argyll Robertson pupil
Rationale: Adie's pupil is a condition of the ciliary ganglion or short ciliary nerves,
causing a dilated pupil with light-near dissociation.
, 18. A small, irregular pupil that reacts to accommodation but not light (Argyll
Robertson pupil) is most commonly associated with:
• A. Diabetes mellitus
• B. Multiple sclerosis
• C. Ocular trauma
• D. Neurosyphilis
Rationale: Argyll Robertson pupils (small, irregular, light-near dissociation) are
classically associated with tertiary syphilis, though they can occur in other conditions.
19. To test the near response of the pupils, the assistant should ask the patient to:
• A. Look at a distant target
• B. Look at a near target, such as their thumb, about 30-40 cm away
• C. Close their eyes
• D. Look up and down
Rationale: The near response is tested by having the patient fixate on a near target
(accommodative target), which elicits convergence, accommodation, and pupillary
constriction.
20. A patient with a III cranial nerve palsy will typically present with which
pupillary finding?
• A. A dilated, non-reactive pupil
• B. A constricted pupil
• C. Normal pupil reaction
• D. Anisocoria that worsens in dim light
Rationale: A complete CN III palsy involves the parasympathetic fibers running in the
outer portion of the nerve, causing a dilated, poorly reactive pupil. This is a sign that
should be evaluated for possible aneurysm, especially in an acute presentation.
21. A patient is found to have a pupil difference of 2 mm in dim light that
becomes less obvious in bright light. This is MOST consistent with:
• A. Anisocoria in bright light
• B. Physiologic anisocoria
• C. Horner syndrome
• D. III nerve palsy
