Certified Ophthalmic Assistant (COA) Exam with Complete Questions and Answers
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Module
COA
Institution
COA
Certified Ophthalmic Assistant (COA) Exam with Complete Questions and AnswersCertified Ophthalmic Assistant (COA) Exam with Complete Questions and AnswersCertified Ophthalmic Assistant (COA) Exam with Complete Questions and AnswersHow are systemic medications administered? - ANSWER-Orally, injectio...
Certified Ophthalmic Assistant (COA)
Exam with Complete Questions and
Answers
How are systemic medications administered? - ANSWER-Orally, injection
(subcutaneously or intramuscularly) or intravenously
How should drops be properly instilled into a patient's eye? - ANSWER-Into the lower
cul de sac (lower fornix)
What does the term idiosyncrasy refer to with ophthalmic drugs? - ANSWER-A bizarre,
peculiar reaction to a drug that is not commonly seen, such as tremors, excitability or
even collapse
What is the name of the instrument used to neutralize lenses? - ANSWER-Lensometer
(Lensmeter)
When recording a prism in a spectacle prescription, what does the abbreviation BO
stand for? - ANSWER-Base out
What is determined by focusing the thin lines in a manual lensometer? - ANSWER-The
sphere of the spectacle prescription
What is the first step in performing lensometry? - ANSWER-Focus the eyepiece
When PRK is being performed, time remaining in the procedure should be announced
in increments of ______ - ANSWER-10 seconds
Name the organism that is most destructive to the eye. - ANSWER-Pseudomonas
Aeruginosa
What procedure using an Argon Laser is thought to destroy areas of ischemic retina? -
ANSWER-Panretinal photocoagulation or panretinal laser
What type of intraocular injection is made at the Pars plana site with a needle and
syringe of medication? - ANSWER-Intravitreal injection
What are the parallel movements of the eyes from one gaze position to another -
ANSWER-Versions
What is the movement of one eye called - ANSWER-Duction
,Versions and ductions are tested by using ________ to test the six pairs of _______
muscles. - ANSWER-Six Cardinal positions, yoke
The movement of the eye outward toward the temple is called _____ - ANSWER-
Abduction
What is the technique used to measure the radius of curvature of the anterior corneal
surface? - ANSWER-A-Scan Keratometry Length Measurements
A localized area of reduced sensitivity in a visual field that is surrounded by an area of
greater sensitivity is termed a ____. - ANSWER-Scotoma
The Goldmann applanation to tonometer prism is best cleaned between patients with
____. - ANSWER-Hydrogen peroxide soaks or 1:10 bleach solution
Which dye solution is used when performing Goldmann applanation? - ANSWER-
Fluorescein dye
What is the diameter of the corneal area properly applanated by a Goldmann
tonometer? - ANSWER-3.06 mm
And unfocused eyepiece can lead to an error of ____. - ANSWER-1 diopter in the K
reading
How many meridians are measured in keratometry? - ANSWER-2 meridians (usually
90° apart)
The average K reading is ____. - ANSWER-43-44 diopters
Keratometry is performed with a device called a ______ - ANSWER-Keratometer or
ophthalmometer
Give three examples in which a Keratometry measurement would be useful. -
ANSWER-Contact lens fitting, refractive surgery, intraocular lens calculations,
keratoconus
Keratometry is measured in _____ - ANSWER-Diopters
Measuring intraocular pressure is also called _____ - ANSWER-Tonometry
The higher the intraocular pressure of an eye, the ____ the eye - ANSWER-Harder
Applanation tonometry displaces less than ____ of aqueous. - ANSWER-0.5 microliters
When recording intraocular pressure, the reading on the Goldmann applanation
tonometer scale should be multiplied by ____. - ANSWER-10
,Because there are no rods or cones in the optic nerve head a____ blind spot is created
in the normal visual field. - ANSWER-Physiologic
A defect in the patient's superior temporal retina, will affect the patient's ____ field of
vision. - ANSWER-Inferior nasal
The two basic methods employed to map the field of vision are ____ and ____
perimetry. - ANSWER-Kinetic, static
Keratometry measures the____ of the anterior curvature of the cornea. - ANSWER-
Central 3.3 mm
The diffusion of oxygen through a contact lens material is referred to as ____. -
ANSWER-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 - ANSWER-True
Name the instrument used to determine the posterior surface radius of curvature of a
rigid contact lens. - ANSWER-Radiuscope and or Contacto Gauge
Increased thirst, excessive urine, production, increased hunger and weight loss are
characteristics of which endocrine disease? - ANSWER-Diabetes insipidus
What finding can occur 6 to 8 hours after a metallic foreign body enters the cornea? -
ANSWER-Rust ring
Why are alkali burns more serious than acid burns on the cornea? - ANSWER-Alkali
burns penetrate deeper
Variability in the functions of levator and extraocular muscle is characteristic in which
systemic disease? - ANSWER-Myasthenia gravis
What is the name of the mucous membrane covering the interior sclera? - ANSWER-
(Bulbar) Conjunctiva
What type of glaucoma constitutes an ocular emergency? - ANSWER-Acute angle-
closure glaucoma
Protocols for pressure patching or shields require that adhesive tape must be applied
from the ____ to the ____. - ANSWER-Bridge of the nose, ear lobe
What is the minimum thickness of safety lenses? - ANSWER-3.0 mm
, What is the name of the important screening process used in emergencies determine
the patient's ocular needs? - ANSWER-Triage
What is a hemorrhage confined to the anterior chamber termed? - ANSWER-Hyphema
____ drugs induce contractions of the iris sphincter - ANSWER-Miotic
Name the three types of ophthalmic preparations placed directly in the eye. - ANSWER-
Solutions, suspensions, ointments
What is the main disadvantage of using an ophthalmic solution? - ANSWER-The
duration of contact with the eye is short, therefore it requires frequent instillation
What is the disadvantage of using an ophthalmic ointment? - ANSWER-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. - ANSWER-Confrontation
The ____ visual field test compares the boundaries of the patient's visual field with that
of the examiner. - ANSWER-Confrontation
The Amsler grid test determines the presence and location of defects in the ____
portion of the visual field. - ANSWER-Central
During Amsler grid testing the patient should be instructed to view the grid through his
or her ____ correction. - ANSWER-Near
Checking the calibration of the Goldmann applanation tomometer is performed with a
____. - ANSWER-Balance or calibration rod
____ photography documents the posterior segment of the eye. - ANSWER-Fundus
____ devices create three dimensional digital images of the optic nerve, and retina. -
ANSWER-Tomography
Three of the most common tomographic image devices are ____, ____, and ____. -
ANSWER-Optical Coherence Tomography (OCT), Heidelberg Retinal Tomography
(HRT), and GDx scanner laser polorimeter
The data provided by tomographic devices are useful in evaluating progressive ____
and ____ damage. - ANSWER-Optic nerve and retinal nerve fiber layer
Ophthalmic photography serves to ____ and ___ ophthalmic conditions. - ANSWER-
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