Certified Ophthalmic Assistant (COA)
2026-2027
Expert-Verified Questions and Answers
(With A+ Grades Guarantee)
,How are systemic medications administered? Orally, injection (subcutaneously or intramuscularly) or intravenously
How should drops be properly instilled into a patient's eye? Into the lower cul de sac (lower fornix)
What does the term idiosyncrasy refer to with ophthalmic A bizarre, peculiar reaction to a drug that is not commonly seen, such as tremors,
drugs? excitability or even collapse
What is the name of the instrument used to neutralize Lensometer (Lensmeter)
lenses?
When recording a prism in a spectacle prescription, what Base out
does the abbreviation BO stand for?
What is determined by focusing the thin lines in a manual The sphere of the spectacle prescription
lensometer?
What is the first step in performing lensometry? Focus the eyepiece
When PRK is being performed, time remaining in the 10 seconds
procedure should be announced in increments of ______
Name the organism that is most destructive to the eye. Pseudomonas Aeruginosa
What procedure using an Argon Laser is thought to Panretinal photocoagulation or panretinal laser
destroy areas of ischemic retina?
What type of intraocular injection is made at the Pars plana Intravitreal injection
site with a needle and syringe of medication?
What are the parallel movements of the eyes from one Versions
gaze position to another
What is the movement of one eye called Duction
Versions and ductions are tested by using ________ to Six Cardinal positions, yoke
test the six pairs of _______ muscles.
The movement of the eye outward toward the temple is Abduction
called _____
,What is the technique used to measure the radius of A-Scan Keratometry Length Measurements
curvature of the anterior corneal surface?
Keratometry is performed with a device called a ______ Keratometer or ophthalmometer
Give three examples in which a Keratometry measurement Contact lens fitting, refractive surgery, intraocular lens calculations, keratoconus
would be useful.
Keratometry is measured in _____ Diopters
Measuring intraocular pressure is also called _____ Tonometry
The higher the intraocular pressure of an eye, the ____ the Harder
eye
Applanation tonometry displaces less than ____ of 0.5 microliters
aqueous.
When recording intraocular pressure, the reading on the 10
Goldmann applanation tonometer scale should be
multiplied by ____.
Because there are no rods or cones in the optic nerve Physiologic
head a____ blind spot is created in the normal visual field.
A defect in the patient's superior temporal retina, will affect Inferior nasal
the patient's ____ field of vision.
The two basic methods employed to map the field of vision Kinetic, static
are ____ and ____ perimetry.
A localized area of reduced sensitivity in a visual field that Scotoma
is surrounded by an area of greater sensitivity is termed a
____.
And unfocused eyepiece can lead to an error of ____. 1 diopter in the K reading
How many meridians are measured in keratometry? 2 meridians (usually 90° apart)
The average K reading is ____. 43-44 diopters
, Keratometry measures the____ of the anterior curvature of Central 3.3 mm
the cornea.
The diffusion of oxygen through a contact lens material is DK value
referred to as ____.
True or False: The application and evaluation of a True
diagnostic lens on the eye is the best way to fit a contact
lens
Name the instrument used to determine the posterior Radiuscope and or Contacto Gauge
surface radius of curvature of a rigid contact lens.
Increased thirst, excessive urine, production, increased Diabetes insipidus
hunger and weight loss are characteristics of which
endocrine disease?
What finding can occur 6 to 8 hours after a metallic foreign Rust ring
body enters the cornea?
Why are alkali burns more serious than acid burns on the Alkali burns penetrate deeper
cornea?
Variability in the functions of levator and extraocular Myasthenia gravis
muscle is characteristic in which systemic disease?
What is the name of the mucous membrane covering the (Bulbar) Conjunctiva
interior sclera?
What type of glaucoma constitutes an ocular emergency? Acute angle-closure glaucoma
Protocols for pressure patching or shields require that Bridge of the nose, ear lobe
adhesive tape must be applied from the ____ to the ____.
What is the minimum thickness of safety lenses? 3.0 mm
What is the name of the important screening process used Triage
in emergencies determine the patient's ocular needs?
What is a hemorrhage confined to the anterior chamber Hyphema
termed?
____ drugs induce contractions of the iris sphincter Miotic
2026-2027
Expert-Verified Questions and Answers
(With A+ Grades Guarantee)
,How are systemic medications administered? Orally, injection (subcutaneously or intramuscularly) or intravenously
How should drops be properly instilled into a patient's eye? Into the lower cul de sac (lower fornix)
What does the term idiosyncrasy refer to with ophthalmic A bizarre, peculiar reaction to a drug that is not commonly seen, such as tremors,
drugs? excitability or even collapse
What is the name of the instrument used to neutralize Lensometer (Lensmeter)
lenses?
When recording a prism in a spectacle prescription, what Base out
does the abbreviation BO stand for?
What is determined by focusing the thin lines in a manual The sphere of the spectacle prescription
lensometer?
What is the first step in performing lensometry? Focus the eyepiece
When PRK is being performed, time remaining in the 10 seconds
procedure should be announced in increments of ______
Name the organism that is most destructive to the eye. Pseudomonas Aeruginosa
What procedure using an Argon Laser is thought to Panretinal photocoagulation or panretinal laser
destroy areas of ischemic retina?
What type of intraocular injection is made at the Pars plana Intravitreal injection
site with a needle and syringe of medication?
What are the parallel movements of the eyes from one Versions
gaze position to another
What is the movement of one eye called Duction
Versions and ductions are tested by using ________ to Six Cardinal positions, yoke
test the six pairs of _______ muscles.
The movement of the eye outward toward the temple is Abduction
called _____
,What is the technique used to measure the radius of A-Scan Keratometry Length Measurements
curvature of the anterior corneal surface?
Keratometry is performed with a device called a ______ Keratometer or ophthalmometer
Give three examples in which a Keratometry measurement Contact lens fitting, refractive surgery, intraocular lens calculations, keratoconus
would be useful.
Keratometry is measured in _____ Diopters
Measuring intraocular pressure is also called _____ Tonometry
The higher the intraocular pressure of an eye, the ____ the Harder
eye
Applanation tonometry displaces less than ____ of 0.5 microliters
aqueous.
When recording intraocular pressure, the reading on the 10
Goldmann applanation tonometer scale should be
multiplied by ____.
Because there are no rods or cones in the optic nerve Physiologic
head a____ blind spot is created in the normal visual field.
A defect in the patient's superior temporal retina, will affect Inferior nasal
the patient's ____ field of vision.
The two basic methods employed to map the field of vision Kinetic, static
are ____ and ____ perimetry.
A localized area of reduced sensitivity in a visual field that Scotoma
is surrounded by an area of greater sensitivity is termed a
____.
And unfocused eyepiece can lead to an error of ____. 1 diopter in the K reading
How many meridians are measured in keratometry? 2 meridians (usually 90° apart)
The average K reading is ____. 43-44 diopters
, Keratometry measures the____ of the anterior curvature of Central 3.3 mm
the cornea.
The diffusion of oxygen through a contact lens material is DK value
referred to as ____.
True or False: The application and evaluation of a True
diagnostic lens on the eye is the best way to fit a contact
lens
Name the instrument used to determine the posterior Radiuscope and or Contacto Gauge
surface radius of curvature of a rigid contact lens.
Increased thirst, excessive urine, production, increased Diabetes insipidus
hunger and weight loss are characteristics of which
endocrine disease?
What finding can occur 6 to 8 hours after a metallic foreign Rust ring
body enters the cornea?
Why are alkali burns more serious than acid burns on the Alkali burns penetrate deeper
cornea?
Variability in the functions of levator and extraocular Myasthenia gravis
muscle is characteristic in which systemic disease?
What is the name of the mucous membrane covering the (Bulbar) Conjunctiva
interior sclera?
What type of glaucoma constitutes an ocular emergency? Acute angle-closure glaucoma
Protocols for pressure patching or shields require that Bridge of the nose, ear lobe
adhesive tape must be applied from the ____ to the ____.
What is the minimum thickness of safety lenses? 3.0 mm
What is the name of the important screening process used Triage
in emergencies determine the patient's ocular needs?
What is a hemorrhage confined to the anterior chamber Hyphema
termed?
____ drugs induce contractions of the iris sphincter Miotic
