1 of 473Detailed Rationales, Study Guide & Review Notes |/
Certified Ophthalmic Assistant Study
Practice questions with correct answers
Agar - ANSWER-What common medium is used to culture microorganisms?
Irritation - ANSWER-A disadvantage of chemical-based rigid contact lens care
systems is?
Ptosis - ANSWER-What is the term for drooping upper eyelids?
Pterygium - ANSWER-A fibrovascular growth of the actinally damaged
conjunctiva that invades a portion of the cornea from the limbus is a?
A fluorescein angiogram is used for which of the following? - ANSWER-Viewing
detail, such as blockages in fundus blood vessels
Chalazion - ANSWER-A granulated inflammation of the eyelid that may be
removed surgically if it does not subside is a?
Hyphema - ANSWER-A hemorrhage that partially fills the anterior chamber with
blood is called
Cross Cylinder - ANSWER-A lens consisting of two cylinders of equal but
opposite powers is the?
A lens with a focal length of 2 meters has a power of? - ANSWER-0.5 D
Pseudophakic - ANSWER-A patient who has had an intraocular lens implantation
is referred to as?
-1.50 -1.00 X 85 - ANSWER-A patient's prescription is -2.50 +1.00 X 175. What
is the minus cylinder transposition?
Certified Ophthalmic Assistant (COA) Page 1
, 2 of 473Detailed Rationales, Study Guide & Review Notes |/
Anterior Chamber - ANSWER-A slit lamp is used to examine the?
Applanation - ANSWER-What is the term for the tonometry technique that
displaces a minimal amount of fluid?
Wash your hands - ANSWER-According to OSHA regulations, what is the BEST
way to comply with universal precautions?
Advances in digital imaging technology facilitated the practical use of what type
of dye? - ANSWER-Indocyanine Green
Chief complaint or reason for patient's visit - ANSWER-After introduction to the
patient, one of the first items that should be obtained as part of history taking is
the?
Scotoma - ANSWER-What is the term for an area of complete or partial
blindness in an otherwise normal visual field?
Comfortability - ANSWER-What is an important difference between soft and rigid
lenses?
Anterior corneal surface to the macula - ANSWER-Axial length is provided by
which measurement?
Handheld Probe - ANSWER-What is the MOST commonly used technique to
perform a B-scan?
High-frequency sound waves through specific ocular tissue - ANSWER-How are
axial length measurements obtained?
cleaned with soapy water - ANSWER-Before sterilization, minor surgical
instruments should be?
Refraction - ANSWER-What is the term for the 'bending of light'?
Calibration of the applanation tonometer is checked by - ANSWER-Using a
measured weight attached to the tonometer balancing arm at 0, 2, and 6
Certified Ophthalmic Assistant (COA) Page 2
, 3 of 473Detailed Rationales, Study Guide & Review Notes |/
Changing the color of the iris - ANSWER-Carbonic anhydrase inhibitors cause all
of the following with the exception of?
Right pupil constriction - ANSWER-Consensual light reflex in the right eye results
in?
rest on the cornea - ANSWER-Corneal curvature measurement is vital to ensure
that a contact lens
scrubbing - ANSWER-What is the term for 'degerming' of the hands?
Dilator - ANSWER-Drugs that dilate the pupil without cycloplegia operate by
stimulating which iris muscle?
Mydriatics - ANSWER-Drugs that dilate the pupils are called
Optic nerve - ANSWER-Glaucoma primarily affects which ocular structure?
The probe should be aligned along the visual axis of the eye - ANSWER-How are
ultrasound biometric measurements obtained?
2 - ANSWER-How many dimensions are represented in a B-Scan image?
6 - ANSWER-How many extraocular muscles move each eye?
3 - ANSWER-How many layers comprise the tear layer?
3 - ANSWER-How many nerves innervate the six extraocular muscles?
determine if the patient can count fingers at a given distance - ANSWER-If a
patient is unable to distinguish the largest letter on a Snellen chart, the assistant
should
How long the wait will be and unfortunately, schedules cannot always be
controlled due to emergencies - ANSWER-If a patient must be kept waiting,
convey?
Certified Ophthalmic Assistant (COA) Page 3
, 4 of 473Detailed Rationales, Study Guide & Review Notes |/
20/60 - ANSWER-If a person can clearly see an object at 20 feet that can be
seen at 60 feet by a person with no refractive error, their visual acuity is said to
be?
pinhole disc - ANSWER-If poor vision is simply due to refractive error, the acuity
should improve with use of a(n)?
afferent pupillary defect? - ANSWER-If the amount of light information
transmitted to the brain from one eye differs from that of the other eye, the patient
has a(n)?
the distance between the corneal surface and the retinal surface - ANSWER-In
A-scan biometry, which ocular measurement provides the axial length of the
globe?
3 - ANSWER-In glare testing, how many controlled degrees of light does the BAT
test deliver when the eye is viewing a Snellen target?
with-the-rule astigmatism - ANSWER-In keratometry, if the power of the vertical
meridian is greater than the power of the horizontal meridian, the patient has?
4-6 months - ANSWER-In visual assessment, an infant would be expected to
reach for toys by the age of?
tonometer - ANSWER-Intraocular pressure is measured with a(n)
pupillary block - ANSWER-Intraocular pressure is measured with a(n)?
cataracts - ANSWER-Measuring visual acuity with a potential acuity meter is
useful for patients with?
14-16 - ANSWER-Near vision charts should be held how many inches from the
eye?
lens and bridge size - ANSWER-On the back of a frame are a few figures such
as 46 X 22. What do these numbers represent?
Certified Ophthalmic Assistant (COA) Page 4
Certified Ophthalmic Assistant Study
Practice questions with correct answers
Agar - ANSWER-What common medium is used to culture microorganisms?
Irritation - ANSWER-A disadvantage of chemical-based rigid contact lens care
systems is?
Ptosis - ANSWER-What is the term for drooping upper eyelids?
Pterygium - ANSWER-A fibrovascular growth of the actinally damaged
conjunctiva that invades a portion of the cornea from the limbus is a?
A fluorescein angiogram is used for which of the following? - ANSWER-Viewing
detail, such as blockages in fundus blood vessels
Chalazion - ANSWER-A granulated inflammation of the eyelid that may be
removed surgically if it does not subside is a?
Hyphema - ANSWER-A hemorrhage that partially fills the anterior chamber with
blood is called
Cross Cylinder - ANSWER-A lens consisting of two cylinders of equal but
opposite powers is the?
A lens with a focal length of 2 meters has a power of? - ANSWER-0.5 D
Pseudophakic - ANSWER-A patient who has had an intraocular lens implantation
is referred to as?
-1.50 -1.00 X 85 - ANSWER-A patient's prescription is -2.50 +1.00 X 175. What
is the minus cylinder transposition?
Certified Ophthalmic Assistant (COA) Page 1
, 2 of 473Detailed Rationales, Study Guide & Review Notes |/
Anterior Chamber - ANSWER-A slit lamp is used to examine the?
Applanation - ANSWER-What is the term for the tonometry technique that
displaces a minimal amount of fluid?
Wash your hands - ANSWER-According to OSHA regulations, what is the BEST
way to comply with universal precautions?
Advances in digital imaging technology facilitated the practical use of what type
of dye? - ANSWER-Indocyanine Green
Chief complaint or reason for patient's visit - ANSWER-After introduction to the
patient, one of the first items that should be obtained as part of history taking is
the?
Scotoma - ANSWER-What is the term for an area of complete or partial
blindness in an otherwise normal visual field?
Comfortability - ANSWER-What is an important difference between soft and rigid
lenses?
Anterior corneal surface to the macula - ANSWER-Axial length is provided by
which measurement?
Handheld Probe - ANSWER-What is the MOST commonly used technique to
perform a B-scan?
High-frequency sound waves through specific ocular tissue - ANSWER-How are
axial length measurements obtained?
cleaned with soapy water - ANSWER-Before sterilization, minor surgical
instruments should be?
Refraction - ANSWER-What is the term for the 'bending of light'?
Calibration of the applanation tonometer is checked by - ANSWER-Using a
measured weight attached to the tonometer balancing arm at 0, 2, and 6
Certified Ophthalmic Assistant (COA) Page 2
, 3 of 473Detailed Rationales, Study Guide & Review Notes |/
Changing the color of the iris - ANSWER-Carbonic anhydrase inhibitors cause all
of the following with the exception of?
Right pupil constriction - ANSWER-Consensual light reflex in the right eye results
in?
rest on the cornea - ANSWER-Corneal curvature measurement is vital to ensure
that a contact lens
scrubbing - ANSWER-What is the term for 'degerming' of the hands?
Dilator - ANSWER-Drugs that dilate the pupil without cycloplegia operate by
stimulating which iris muscle?
Mydriatics - ANSWER-Drugs that dilate the pupils are called
Optic nerve - ANSWER-Glaucoma primarily affects which ocular structure?
The probe should be aligned along the visual axis of the eye - ANSWER-How are
ultrasound biometric measurements obtained?
2 - ANSWER-How many dimensions are represented in a B-Scan image?
6 - ANSWER-How many extraocular muscles move each eye?
3 - ANSWER-How many layers comprise the tear layer?
3 - ANSWER-How many nerves innervate the six extraocular muscles?
determine if the patient can count fingers at a given distance - ANSWER-If a
patient is unable to distinguish the largest letter on a Snellen chart, the assistant
should
How long the wait will be and unfortunately, schedules cannot always be
controlled due to emergencies - ANSWER-If a patient must be kept waiting,
convey?
Certified Ophthalmic Assistant (COA) Page 3
, 4 of 473Detailed Rationales, Study Guide & Review Notes |/
20/60 - ANSWER-If a person can clearly see an object at 20 feet that can be
seen at 60 feet by a person with no refractive error, their visual acuity is said to
be?
pinhole disc - ANSWER-If poor vision is simply due to refractive error, the acuity
should improve with use of a(n)?
afferent pupillary defect? - ANSWER-If the amount of light information
transmitted to the brain from one eye differs from that of the other eye, the patient
has a(n)?
the distance between the corneal surface and the retinal surface - ANSWER-In
A-scan biometry, which ocular measurement provides the axial length of the
globe?
3 - ANSWER-In glare testing, how many controlled degrees of light does the BAT
test deliver when the eye is viewing a Snellen target?
with-the-rule astigmatism - ANSWER-In keratometry, if the power of the vertical
meridian is greater than the power of the horizontal meridian, the patient has?
4-6 months - ANSWER-In visual assessment, an infant would be expected to
reach for toys by the age of?
tonometer - ANSWER-Intraocular pressure is measured with a(n)
pupillary block - ANSWER-Intraocular pressure is measured with a(n)?
cataracts - ANSWER-Measuring visual acuity with a potential acuity meter is
useful for patients with?
14-16 - ANSWER-Near vision charts should be held how many inches from the
eye?
lens and bridge size - ANSWER-On the back of a frame are a few figures such
as 46 X 22. What do these numbers represent?
Certified Ophthalmic Assistant (COA) Page 4
