Test Bank 2 for COA - Certified
Ophthalmic Assistant Newest Prep with
200 Latest Questions and Correct
Answers/ COA Latest Exam / Certified
Ophthalmic Assistant
Section 1: Visual Assessment & Refraction (Questions 1-20)
1. When documenting visual acuity, the notation "CF @ 2 feet" indicates:
• A) The patient can count fingers at 20 feet
• B) The patient can count fingers at 2 feet but cannot read the Snellen chart
• C) The patient has 2/20 vision
• D) The patient needs a +2.00 diopter correction
• Rationale: When a patient cannot read any letters on the Snellen chart, the
examiner documents the highest level of visual function. "Counts fingers at 2
feet" (CF @ 2 ft) indicates the patient can distinguish fingers only at that close
distance. This is a standard method of documenting low vision.
2. The principal purpose of fogging during subjective refraction is to:
• A) Relax accommodation to obtain accurate refractive measurements
• B) Increase the patient's visual acuity temporarily
• C) Test for astigmatism
• D) Determine the patient's near vision ability
• Rationale: Fogging involves adding plus power to relax the patient's
accommodation during subjective refraction . When accommodation is relaxed,
the eye's true refractive state can be more accurately determined.
3. The "duochrome test" (red-green test) is used to:
• A) Assess color vision deficiency
• B) Determine the spherical endpoint by evaluating focus on the retina
, • C) Measure the axis of astigmatism
• D) Test for contrast sensitivity
• Rationale: The duochrome test uses red and green filters. Light focuses
differently based on wavelength—green focuses slightly in front of the retina, red
slightly behind. A patient who sees red letters more clearly is myopic (needs more
minus power), and seeing green more clearly indicates hyperopia (needs more
plus power) .
4. When performing near vision testing, the standard reading distance is:
• A) 10-12 inches
• B) 14-16 inches
• C) 20-22 inches
• D) 30-36 inches
• Rationale: Standard near testing distance is 14-16 inches (approximately 35-40
cm). Near vision cards like the Jaeger or Rosenbaum charts are calibrated for this
distance.
5. A patient presents with 20/20 vision in both eyes but reports difficulty reading
small print. The most appropriate next step is to:
• A) Perform near vision testing
• B) Refer for visual field testing
• C) Perform color vision testing
• D) Check for a relative afferent pupillary defect
• Rationale: Difficulty with near vision while maintaining good distance vision
suggests presbyopia. Near vision testing using a Jaeger or Rosenbaum chart is
the appropriate assessment.
6. The "pinhole test" is used to:
• A) Measure intraocular pressure
• B) Differentiate refractive error from pathological vision loss
• C) Test for color blindness
• D) Assess peripheral vision
• Rationale: Pinhole testing improves vision by eliminating scattered light and
reducing the blur circle. If vision improves with a pinhole, the cause is likely
refractive (correctable with lenses). If vision does NOT improve with a pinhole, the
cause is likely pathology (e.g., cataract, macular degeneration, optic nerve
disease).
7. The Jaeger notation "J1" represents:
, • A) The smallest print that can be read
• B) The smallest print that can be read at near
• C) A standard reading distance of 14 inches
• D) The equivalent of 20/20 vision
• Rationale: Jaeger notation ranges from J1 (smallest, most difficult to read) to J20
(largest). J1 corresponds to approximately 20/20 at near, though this can vary by
card design. Some sources equate J1 to approximately 20/25 at 14 inches.
8. The correct procedure for measuring visual acuity in a pre-verbal child is:
• A) Use standard Snellen chart
• B) Use Allen or LEA symbols cards
• C) Use the Jaeger near card
• D) Use a color vision test
• Rationale: For pre-verbal children or individuals who cannot identify letters,
picture-based testing using Allen cards, LEA symbols, or HOTV matching is
appropriate. These tests use familiar shapes or symbols the child can identify or
match .
Section 2: Pupil Assessment & Ocular Motility (Questions 9-
16)
9. The primary cranial nerve responsible for pupillary constriction
(parasympathetic pathway) is:
• A) Cranial nerve III (Oculomotor)
• B) Cranial nerve V (Trigeminal)
• C) Cranial nerve IV (Trochlear)
• D) Cranial nerve VI (Abducens)
• Rationale: The efferent (motor) pathway of the pupillary light reflex travels via
cranial nerve III (the oculomotor nerve) to the iris sphincter muscle. Damage to
this pathway results in a pupil that does not constrict to light.
10. Pharmacologic dilation is used to:
• A) Treat glaucoma
• B) Facilitate fundus examination by dilating the pupil
• C) Measure intraocular pressure
, • D) Reduce inflammation
• Rationale: Pharmacologic dilation using medications like tropicamide or
phenylephrine allows for a thorough examination of the retina, optic nerve, and
macula by opening the pupil. This is a critical part of a comprehensive eye exam
and is often performed prior to fundus photography, OCT imaging, or a dilated
fundus examination.
11. When performing the cover-uncover test, the examiner observes the left eye
move inward to pick up fixation after the right eye is covered. This indicates:
• A) Left exotropia (the left eye was turned outward)
• B) Left esotropia (the left eye was turned inward)
• C) Right exotropia (the right eye was turned outward)
• D) Right esotropia (the right eye was turned inward)
• Rationale: The cover-uncover test evaluates for strabismus. When one eye is
covered, if the other eye moves to pick up fixation, the eye had a tropia.
Movement in indicates an esotropia, movement out indicates an exotropia. Here,
the left eye moves inward (adducts), meaning it was previously deviated outward
(exotropia) .
12. During alternate cover testing, if the eye moves outward when the cover is
removed, this indicates:
• A) Esophoria
• B) Exophoria (a latent outward deviation)
• C) A tropia
• D) Normal alignment
• Rationale: The alternate cover test dissociates the eyes to detect a phoria (latent
deviation). If the eye is seen to move outward when uncovered, this means it had
been deviated inward during dissociation—an esophoria. If the eye moves
inward, it's an exophoria.
13. The "Hirschberg test" is used to:
• A) Assess color vision
• B) Estimate the angle of strabismus by observing the corneal light reflex
• C) Measure pupil size
• D) Test accommodation
• Rationale: The Hirschberg test, also known as the corneal light reflex test, is a
quick method for estimating the angle of strabismus. A penlight is directed at the
patient's eyes; the position of the light reflex on the cornea indicates the degree
Ophthalmic Assistant Newest Prep with
200 Latest Questions and Correct
Answers/ COA Latest Exam / Certified
Ophthalmic Assistant
Section 1: Visual Assessment & Refraction (Questions 1-20)
1. When documenting visual acuity, the notation "CF @ 2 feet" indicates:
• A) The patient can count fingers at 20 feet
• B) The patient can count fingers at 2 feet but cannot read the Snellen chart
• C) The patient has 2/20 vision
• D) The patient needs a +2.00 diopter correction
• Rationale: When a patient cannot read any letters on the Snellen chart, the
examiner documents the highest level of visual function. "Counts fingers at 2
feet" (CF @ 2 ft) indicates the patient can distinguish fingers only at that close
distance. This is a standard method of documenting low vision.
2. The principal purpose of fogging during subjective refraction is to:
• A) Relax accommodation to obtain accurate refractive measurements
• B) Increase the patient's visual acuity temporarily
• C) Test for astigmatism
• D) Determine the patient's near vision ability
• Rationale: Fogging involves adding plus power to relax the patient's
accommodation during subjective refraction . When accommodation is relaxed,
the eye's true refractive state can be more accurately determined.
3. The "duochrome test" (red-green test) is used to:
• A) Assess color vision deficiency
• B) Determine the spherical endpoint by evaluating focus on the retina
, • C) Measure the axis of astigmatism
• D) Test for contrast sensitivity
• Rationale: The duochrome test uses red and green filters. Light focuses
differently based on wavelength—green focuses slightly in front of the retina, red
slightly behind. A patient who sees red letters more clearly is myopic (needs more
minus power), and seeing green more clearly indicates hyperopia (needs more
plus power) .
4. When performing near vision testing, the standard reading distance is:
• A) 10-12 inches
• B) 14-16 inches
• C) 20-22 inches
• D) 30-36 inches
• Rationale: Standard near testing distance is 14-16 inches (approximately 35-40
cm). Near vision cards like the Jaeger or Rosenbaum charts are calibrated for this
distance.
5. A patient presents with 20/20 vision in both eyes but reports difficulty reading
small print. The most appropriate next step is to:
• A) Perform near vision testing
• B) Refer for visual field testing
• C) Perform color vision testing
• D) Check for a relative afferent pupillary defect
• Rationale: Difficulty with near vision while maintaining good distance vision
suggests presbyopia. Near vision testing using a Jaeger or Rosenbaum chart is
the appropriate assessment.
6. The "pinhole test" is used to:
• A) Measure intraocular pressure
• B) Differentiate refractive error from pathological vision loss
• C) Test for color blindness
• D) Assess peripheral vision
• Rationale: Pinhole testing improves vision by eliminating scattered light and
reducing the blur circle. If vision improves with a pinhole, the cause is likely
refractive (correctable with lenses). If vision does NOT improve with a pinhole, the
cause is likely pathology (e.g., cataract, macular degeneration, optic nerve
disease).
7. The Jaeger notation "J1" represents:
, • A) The smallest print that can be read
• B) The smallest print that can be read at near
• C) A standard reading distance of 14 inches
• D) The equivalent of 20/20 vision
• Rationale: Jaeger notation ranges from J1 (smallest, most difficult to read) to J20
(largest). J1 corresponds to approximately 20/20 at near, though this can vary by
card design. Some sources equate J1 to approximately 20/25 at 14 inches.
8. The correct procedure for measuring visual acuity in a pre-verbal child is:
• A) Use standard Snellen chart
• B) Use Allen or LEA symbols cards
• C) Use the Jaeger near card
• D) Use a color vision test
• Rationale: For pre-verbal children or individuals who cannot identify letters,
picture-based testing using Allen cards, LEA symbols, or HOTV matching is
appropriate. These tests use familiar shapes or symbols the child can identify or
match .
Section 2: Pupil Assessment & Ocular Motility (Questions 9-
16)
9. The primary cranial nerve responsible for pupillary constriction
(parasympathetic pathway) is:
• A) Cranial nerve III (Oculomotor)
• B) Cranial nerve V (Trigeminal)
• C) Cranial nerve IV (Trochlear)
• D) Cranial nerve VI (Abducens)
• Rationale: The efferent (motor) pathway of the pupillary light reflex travels via
cranial nerve III (the oculomotor nerve) to the iris sphincter muscle. Damage to
this pathway results in a pupil that does not constrict to light.
10. Pharmacologic dilation is used to:
• A) Treat glaucoma
• B) Facilitate fundus examination by dilating the pupil
• C) Measure intraocular pressure
, • D) Reduce inflammation
• Rationale: Pharmacologic dilation using medications like tropicamide or
phenylephrine allows for a thorough examination of the retina, optic nerve, and
macula by opening the pupil. This is a critical part of a comprehensive eye exam
and is often performed prior to fundus photography, OCT imaging, or a dilated
fundus examination.
11. When performing the cover-uncover test, the examiner observes the left eye
move inward to pick up fixation after the right eye is covered. This indicates:
• A) Left exotropia (the left eye was turned outward)
• B) Left esotropia (the left eye was turned inward)
• C) Right exotropia (the right eye was turned outward)
• D) Right esotropia (the right eye was turned inward)
• Rationale: The cover-uncover test evaluates for strabismus. When one eye is
covered, if the other eye moves to pick up fixation, the eye had a tropia.
Movement in indicates an esotropia, movement out indicates an exotropia. Here,
the left eye moves inward (adducts), meaning it was previously deviated outward
(exotropia) .
12. During alternate cover testing, if the eye moves outward when the cover is
removed, this indicates:
• A) Esophoria
• B) Exophoria (a latent outward deviation)
• C) A tropia
• D) Normal alignment
• Rationale: The alternate cover test dissociates the eyes to detect a phoria (latent
deviation). If the eye is seen to move outward when uncovered, this means it had
been deviated inward during dissociation—an esophoria. If the eye moves
inward, it's an exophoria.
13. The "Hirschberg test" is used to:
• A) Assess color vision
• B) Estimate the angle of strabismus by observing the corneal light reflex
• C) Measure pupil size
• D) Test accommodation
• Rationale: The Hirschberg test, also known as the corneal light reflex test, is a
quick method for estimating the angle of strabismus. A penlight is directed at the
patient's eyes; the position of the light reflex on the cornea indicates the degree
