1 for specific request mail
Certified Ophthalmic Assistant (COA) Questions and
Correct Answers | Latest Update
How are systemic medications administered? Ans: Orally, injection
(subcutaneously or intramuscularly) or intravenously
How should drops be properly instilled into a patient's eye? Ans: Into the
lower cul de sac (lower fornix)
What does the term idiosyncrasy refer to with ophthalmic drugs? Ans: A
bizarre, peculiar reaction to a drug that is not commonly seen, such as
Assignment Expert
tremors, excitability or even collapse
What is the name of the instrument used to neutralize lenses? Ans:
Guru01 - Stuvia
Lensometer (Lensmeter)
When recording a prism in a spectacle prescription, what does the
abbreviation BO stand for? Ans: Base out
2026
What is determined by focusing the thin lines in a manual lensometer?
Ans: The sphere of the spectacle prescription
©
What is the first step in performing lensometry? Ans: Focus the eyepiece
When PRK is being performed, time remaining in the procedure should be
announced in increments of ______ Ans: 10 seconds
Name the organism that is most destructive to the eye. Ans:
Pseudomonas Aeruginosa
What procedure using an Argon Laser is thought to destroy areas of
ischemic retina? Ans: Panretinal photocoagulation or panretinal laser
What type of intraocular injection is made at the Pars plana site with a
needle and syringe of medication? Ans: Intravitreal injection
, 2 for specific request mail
What are the parallel movements of the eyes from one gaze position to
another Ans: Versions
What is the movement of one eye called Ans: Duction
Versions and ductions are tested by using ________ to test the six pairs of
_______ muscles. Ans: Six Cardinal positions, yoke
The movement of the eye outward toward the temple is called _____ Ans:
Abduction
What is the technique used to measure the radius of curvature of the
Assignment Expert
anterior corneal surface? Ans: A-Scan Keratometry Length Measurements
Keratometry is performed with a device called a ______ Ans: Keratometer
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or ophthalmometer
Give three examples in which a Keratometry measurement would be
useful. Ans: Contact lens fitting, refractive surgery, intraocular lens
2026
calculations, keratoconus
Keratometry is measured in _____ Ans: Diopters
©
Measuring intraocular pressure is also called _____ Ans: Tonometry
The higher the intraocular pressure of an eye, the ____ the eye Ans:
Harder
Applanation tonometry displaces less than ____ of aqueous. Ans: 0.5
microliters
When recording intraocular pressure, the reading on the Goldmann
applanation tonometer scale should be multiplied by ____. Ans: 10
Because there are no rods or cones in the optic nerve head a____ blind
spot is created in the normal visual field. Ans: Physiologic
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A defect in the patient's superior temporal retina, will affect the patient's
____ field of vision. Ans: Inferior nasal
The two basic methods employed to map the field of vision are ____ and
____ perimetry. Ans: Kinetic, static
A localized area of reduced sensitivity in a visual field that is surrounded
by an area of greater sensitivity is termed a ____. Ans: Scotoma
And unfocused eyepiece can lead to an error of ____. Ans: 1 diopter in the
K reading
Assignment Expert
How many meridians are measured in keratometry? Ans: 2 meridians
(usually 90° apart)
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The average K reading is ____. Ans: 43-44 diopters
Keratometry measures the____ of the anterior curvature of the cornea.
Ans: Central 3.3 mm
2026
The diffusion of oxygen through a contact lens material is referred to as
____. Ans: DK value
©
True or False: The application and evaluation of a diagnostic lens on the
eye is the best way to fit a contact lens Ans: True
Name the instrument used to determine the posterior surface radius of
curvature of a rigid contact lens. Ans: Radiuscope and or Contacto Gauge
Increased thirst, excessive urine, production, increased hunger and
weight loss are characteristics of which endocrine disease? Ans: Diabetes
insipidus
What finding can occur 6 to 8 hours after a metallic foreign body enters
the cornea? Ans: Rust ring
Why are alkali burns more serious than acid burns on the cornea? Ans:
Alkali burns penetrate deeper
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Variability in the functions of levator and extraocular muscle is
characteristic in which systemic disease? Ans: Myasthenia gravis
What is the name of the mucous membrane covering the interior sclera?
Ans: (Bulbar) Conjunctiva
What type of glaucoma constitutes an ocular emergency? Ans: Acute
angle-closure glaucoma
Protocols for pressure patching or shields require that adhesive tape
must be applied from the ____ to the ____. Ans: Bridge of the nose, ear
lobe
Assignment Expert
What is the minimum thickness of safety lenses? Ans: 3.0 mm
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What is the name of the important screening process used in emergencies
determine the patient's ocular needs? Ans: Triage
What is a hemorrhage confined to the anterior chamber termed? Ans:
2026
Hyphema
____ drugs induce contractions of the iris sphincter Ans: Miotic
©
Name the three types of ophthalmic preparations placed directly in the
eye. Ans: Solutions, suspensions, ointments
What is the main disadvantage of using an ophthalmic solution? Ans: The
duration of contact with the eye is short, therefore it requires frequent
instillation
What is the disadvantage of using an ophthalmic ointment? Ans: The
ointment reduces vision by creating a greasy film over the surface of the
cornea, and is best used at bedtime.
Gross evaluation of the patient's peripheral vision can be accomplished
with ____ visual field testing. Ans: Confrontation
Certified Ophthalmic Assistant (COA) Questions and
Correct Answers | Latest Update
How are systemic medications administered? Ans: Orally, injection
(subcutaneously or intramuscularly) or intravenously
How should drops be properly instilled into a patient's eye? Ans: Into the
lower cul de sac (lower fornix)
What does the term idiosyncrasy refer to with ophthalmic drugs? Ans: A
bizarre, peculiar reaction to a drug that is not commonly seen, such as
Assignment Expert
tremors, excitability or even collapse
What is the name of the instrument used to neutralize lenses? Ans:
Guru01 - Stuvia
Lensometer (Lensmeter)
When recording a prism in a spectacle prescription, what does the
abbreviation BO stand for? Ans: Base out
2026
What is determined by focusing the thin lines in a manual lensometer?
Ans: The sphere of the spectacle prescription
©
What is the first step in performing lensometry? Ans: Focus the eyepiece
When PRK is being performed, time remaining in the procedure should be
announced in increments of ______ Ans: 10 seconds
Name the organism that is most destructive to the eye. Ans:
Pseudomonas Aeruginosa
What procedure using an Argon Laser is thought to destroy areas of
ischemic retina? Ans: Panretinal photocoagulation or panretinal laser
What type of intraocular injection is made at the Pars plana site with a
needle and syringe of medication? Ans: Intravitreal injection
, 2 for specific request mail
What are the parallel movements of the eyes from one gaze position to
another Ans: Versions
What is the movement of one eye called Ans: Duction
Versions and ductions are tested by using ________ to test the six pairs of
_______ muscles. Ans: Six Cardinal positions, yoke
The movement of the eye outward toward the temple is called _____ Ans:
Abduction
What is the technique used to measure the radius of curvature of the
Assignment Expert
anterior corneal surface? Ans: A-Scan Keratometry Length Measurements
Keratometry is performed with a device called a ______ Ans: Keratometer
Guru01 - Stuvia
or ophthalmometer
Give three examples in which a Keratometry measurement would be
useful. Ans: Contact lens fitting, refractive surgery, intraocular lens
2026
calculations, keratoconus
Keratometry is measured in _____ Ans: Diopters
©
Measuring intraocular pressure is also called _____ Ans: Tonometry
The higher the intraocular pressure of an eye, the ____ the eye Ans:
Harder
Applanation tonometry displaces less than ____ of aqueous. Ans: 0.5
microliters
When recording intraocular pressure, the reading on the Goldmann
applanation tonometer scale should be multiplied by ____. Ans: 10
Because there are no rods or cones in the optic nerve head a____ blind
spot is created in the normal visual field. Ans: Physiologic
, 3 for specific request mail
A defect in the patient's superior temporal retina, will affect the patient's
____ field of vision. Ans: Inferior nasal
The two basic methods employed to map the field of vision are ____ and
____ perimetry. Ans: Kinetic, static
A localized area of reduced sensitivity in a visual field that is surrounded
by an area of greater sensitivity is termed a ____. Ans: Scotoma
And unfocused eyepiece can lead to an error of ____. Ans: 1 diopter in the
K reading
Assignment Expert
How many meridians are measured in keratometry? Ans: 2 meridians
(usually 90° apart)
Guru01 - Stuvia
The average K reading is ____. Ans: 43-44 diopters
Keratometry measures the____ of the anterior curvature of the cornea.
Ans: Central 3.3 mm
2026
The diffusion of oxygen through a contact lens material is referred to as
____. Ans: DK value
©
True or False: The application and evaluation of a diagnostic lens on the
eye is the best way to fit a contact lens Ans: True
Name the instrument used to determine the posterior surface radius of
curvature of a rigid contact lens. Ans: Radiuscope and or Contacto Gauge
Increased thirst, excessive urine, production, increased hunger and
weight loss are characteristics of which endocrine disease? Ans: Diabetes
insipidus
What finding can occur 6 to 8 hours after a metallic foreign body enters
the cornea? Ans: Rust ring
Why are alkali burns more serious than acid burns on the cornea? Ans:
Alkali burns penetrate deeper
, 4 for specific request mail
Variability in the functions of levator and extraocular muscle is
characteristic in which systemic disease? Ans: Myasthenia gravis
What is the name of the mucous membrane covering the interior sclera?
Ans: (Bulbar) Conjunctiva
What type of glaucoma constitutes an ocular emergency? Ans: Acute
angle-closure glaucoma
Protocols for pressure patching or shields require that adhesive tape
must be applied from the ____ to the ____. Ans: Bridge of the nose, ear
lobe
Assignment Expert
What is the minimum thickness of safety lenses? Ans: 3.0 mm
Guru01 - Stuvia
What is the name of the important screening process used in emergencies
determine the patient's ocular needs? Ans: Triage
What is a hemorrhage confined to the anterior chamber termed? Ans:
2026
Hyphema
____ drugs induce contractions of the iris sphincter Ans: Miotic
©
Name the three types of ophthalmic preparations placed directly in the
eye. Ans: Solutions, suspensions, ointments
What is the main disadvantage of using an ophthalmic solution? Ans: The
duration of contact with the eye is short, therefore it requires frequent
instillation
What is the disadvantage of using an ophthalmic ointment? Ans: The
ointment reduces vision by creating a greasy film over the surface of the
cornea, and is best used at bedtime.
Gross evaluation of the patient's peripheral vision can be accomplished
with ____ visual field testing. Ans: Confrontation
