COA -CERTIFIED OPHTHALMIC ASSISTANT
TEST BANK 2 EXAM REVIEW WITH ACTUAL
CORRECT QUESTIONS AND VERIFIED
DETAILED ANSWERS| CURRENTLY TESTING
VERSION | ALREADY GRADED
A+|NEWEST|EXPERT VERIFIED FOR
GUARANTEED PASS 2026/2027
What is the term for the concentration of a chemical in a pharmaceutical solution?
Select one:
a. Stability
b. Sterility
c. Tonicity
d. Toxicity
C: The term for the concentration of a chemical in a pharmaceutical solution is
"tonicity".
Explanation: Tonicity refers to the relative concentration of solutes in a solution
compared to another solution, particularly in relation to how it might affect a cell when
exposed to it.
Key points about the options:
Stability: This refers to how well a chemical compound maintains its structure and
properties over time.
Sterility: Indicates the absence of living microorganisms in a solution.
Toxicity: Describes the potential harmful effects of a substance.
Which drug is used for applanation tonometry?
Select one:
a. Hydrogen peroxide
b. Atropine
c. Pilocarpine
d. Proparacaine
D
1|Page
,What measures the dioptric power of the cornea?
Select one:
a. Ultrasound
b. Keratometry
c. Tonometry
d. Tomography
The answer is b. Keratometry.
Explanation: A keratometer is a medical device specifically designed to measure the
curvature of the cornea's anterior surface, which directly relates to its dioptric power.
Ultrasound: Used to measure corneal thickness, not its dioptric power.
Tonometry: Measures intraocular pressure, not corneal power.
Tomography: Can provide a more detailed image of the cornea, including both anterior
and posterior surfaces, allowing for a more accurate calculation of corneal power.
What does BID stand for?
Select one:
a. Once a day
b. Twice a day
c. Three times a day
d. Four times a day
Twice a day
What is a possible side effect of long-term systemic steroids?
Select one:
a. Retinal detachment
b. Cataracts
c. Keratoconus
d. Hyphema
B
There are four important ocular side effects of corticosteroids: steroid-induced
glaucoma, cataract formation, delayed wound healing, and increased susceptibility to
infection.
What two items are used to clean the retinoscopy lens, polarizing lens, red lens, and
Maddox rod lens?
Select one:
a. Lens cloth and canned air
b. Lens cloth and alcohol
2|Page
,c. Cotton tip swab and glass cleaner
d. Cotton tip swab and alcohol
The correct answer is a. Lens cloth and canned air.
Explanation:
When cleaning ophthalmic lenses like retinoscopy, polarizing, red, and Maddox rod
lenses, the best practice is to use a dedicated lens cloth and a puff of canned air to
remove dust particles before wiping with a slightly damp lens cloth.
Why not the other options:
b. Lens cloth and alcohol: While alcohol can be used in some situations, it's generally
not recommended for cleaning ophthalmic lenses as it can damage the lens coatings.
c. Cotton tip swab and glass cleaner: Cotton swabs can scratch the lens surface, and
glass cleaner might not be formulated for delicate optical lenses.
d. Cotton tip swab and alcohol: Similar to option c, using a cotton swab can scratch
the lens.
What is the second step in preparing absorbable sutures before loading on a needle
holder?
Select one:
a. Cut the suture in half.
b. Rinse the suture.
c. Dry the suture.
d. Inform the physician.
B
The second step in preparing absorbable sutures before loading on a needle holder is to
"rinse the suture"
Explanation: After removing the suture from its package, the first step is usually to cut
the desired length, and then the second step is to rinse off any excess packaging
material with sterile saline.
Key points about the options:
Cut the suture in half: This is often the first step, but not the second
Dry the suture: While drying might be necessary in some situations, it's typically not
the second step as rinsing comes first
Inform the physician: This is not a step in preparing the suture itself, but rather a
communication aspect if there are any concerns
3|Page
, Which statement is TRUE regarding the routine maintenance of a phoropter?
Select one:
a. Cover it with a protective dust cover when not in use.
b. Alcohol can be used to clean the auxiliary lenses.
c. Check for lens placement with your finger.
d. Preventative maintenance should be performed monthly.
The true statement regarding routine maintenance of a phoropter is a. Cover it with a
protective dust cover when not in use.
Explanation:
Dust cover:
Keeping a phoropter covered with a dust cover when not in use is crucial to prevent dust
accumulation on the lenses, which can affect accuracy.
Alcohol and lens cleaning:
While some cleaning may involve alcohol, it's important to follow the manufacturer's
instructions on cleaning solutions and not directly touch the lenses with fingers.
Finger check:
Checking lens placement with your finger is not recommended as it can contaminate
the lenses.
Preventative maintenance:
While some basic cleaning can be done regularly, more thorough preventative
maintenance is usually performed on a schedule recommended by the manufacturer,
which is typically not monthly.
How is calibration of the applanation tonometer checked?
Select one:
a. By a qualified service technician
b. By using a measured weight attached to the tonometer balancing arm at 0, 2, and 6
c. By using a measured weight attached to the tonometer balancing arm at 0, 3, and 5
d. By having a second technician verify the IOP measurements on several patients
The calibration of an applanation tonometer is checked by "using a measured weight
attached to the tonometer balancing arm at 0, 2, and 6". So the answer is b. By using a
measured weight attached to the tonometer balancing arm at 0, 2, and 6.
Explanation: This method involves attaching a small, precisely weighed rod to the
tonometer's balancing arm and checking the readings at specific dial positions
(typically 0, 2, and 6) to ensure the instrument is accurately measuring pressure.
4|Page
TEST BANK 2 EXAM REVIEW WITH ACTUAL
CORRECT QUESTIONS AND VERIFIED
DETAILED ANSWERS| CURRENTLY TESTING
VERSION | ALREADY GRADED
A+|NEWEST|EXPERT VERIFIED FOR
GUARANTEED PASS 2026/2027
What is the term for the concentration of a chemical in a pharmaceutical solution?
Select one:
a. Stability
b. Sterility
c. Tonicity
d. Toxicity
C: The term for the concentration of a chemical in a pharmaceutical solution is
"tonicity".
Explanation: Tonicity refers to the relative concentration of solutes in a solution
compared to another solution, particularly in relation to how it might affect a cell when
exposed to it.
Key points about the options:
Stability: This refers to how well a chemical compound maintains its structure and
properties over time.
Sterility: Indicates the absence of living microorganisms in a solution.
Toxicity: Describes the potential harmful effects of a substance.
Which drug is used for applanation tonometry?
Select one:
a. Hydrogen peroxide
b. Atropine
c. Pilocarpine
d. Proparacaine
D
1|Page
,What measures the dioptric power of the cornea?
Select one:
a. Ultrasound
b. Keratometry
c. Tonometry
d. Tomography
The answer is b. Keratometry.
Explanation: A keratometer is a medical device specifically designed to measure the
curvature of the cornea's anterior surface, which directly relates to its dioptric power.
Ultrasound: Used to measure corneal thickness, not its dioptric power.
Tonometry: Measures intraocular pressure, not corneal power.
Tomography: Can provide a more detailed image of the cornea, including both anterior
and posterior surfaces, allowing for a more accurate calculation of corneal power.
What does BID stand for?
Select one:
a. Once a day
b. Twice a day
c. Three times a day
d. Four times a day
Twice a day
What is a possible side effect of long-term systemic steroids?
Select one:
a. Retinal detachment
b. Cataracts
c. Keratoconus
d. Hyphema
B
There are four important ocular side effects of corticosteroids: steroid-induced
glaucoma, cataract formation, delayed wound healing, and increased susceptibility to
infection.
What two items are used to clean the retinoscopy lens, polarizing lens, red lens, and
Maddox rod lens?
Select one:
a. Lens cloth and canned air
b. Lens cloth and alcohol
2|Page
,c. Cotton tip swab and glass cleaner
d. Cotton tip swab and alcohol
The correct answer is a. Lens cloth and canned air.
Explanation:
When cleaning ophthalmic lenses like retinoscopy, polarizing, red, and Maddox rod
lenses, the best practice is to use a dedicated lens cloth and a puff of canned air to
remove dust particles before wiping with a slightly damp lens cloth.
Why not the other options:
b. Lens cloth and alcohol: While alcohol can be used in some situations, it's generally
not recommended for cleaning ophthalmic lenses as it can damage the lens coatings.
c. Cotton tip swab and glass cleaner: Cotton swabs can scratch the lens surface, and
glass cleaner might not be formulated for delicate optical lenses.
d. Cotton tip swab and alcohol: Similar to option c, using a cotton swab can scratch
the lens.
What is the second step in preparing absorbable sutures before loading on a needle
holder?
Select one:
a. Cut the suture in half.
b. Rinse the suture.
c. Dry the suture.
d. Inform the physician.
B
The second step in preparing absorbable sutures before loading on a needle holder is to
"rinse the suture"
Explanation: After removing the suture from its package, the first step is usually to cut
the desired length, and then the second step is to rinse off any excess packaging
material with sterile saline.
Key points about the options:
Cut the suture in half: This is often the first step, but not the second
Dry the suture: While drying might be necessary in some situations, it's typically not
the second step as rinsing comes first
Inform the physician: This is not a step in preparing the suture itself, but rather a
communication aspect if there are any concerns
3|Page
, Which statement is TRUE regarding the routine maintenance of a phoropter?
Select one:
a. Cover it with a protective dust cover when not in use.
b. Alcohol can be used to clean the auxiliary lenses.
c. Check for lens placement with your finger.
d. Preventative maintenance should be performed monthly.
The true statement regarding routine maintenance of a phoropter is a. Cover it with a
protective dust cover when not in use.
Explanation:
Dust cover:
Keeping a phoropter covered with a dust cover when not in use is crucial to prevent dust
accumulation on the lenses, which can affect accuracy.
Alcohol and lens cleaning:
While some cleaning may involve alcohol, it's important to follow the manufacturer's
instructions on cleaning solutions and not directly touch the lenses with fingers.
Finger check:
Checking lens placement with your finger is not recommended as it can contaminate
the lenses.
Preventative maintenance:
While some basic cleaning can be done regularly, more thorough preventative
maintenance is usually performed on a schedule recommended by the manufacturer,
which is typically not monthly.
How is calibration of the applanation tonometer checked?
Select one:
a. By a qualified service technician
b. By using a measured weight attached to the tonometer balancing arm at 0, 2, and 6
c. By using a measured weight attached to the tonometer balancing arm at 0, 3, and 5
d. By having a second technician verify the IOP measurements on several patients
The calibration of an applanation tonometer is checked by "using a measured weight
attached to the tonometer balancing arm at 0, 2, and 6". So the answer is b. By using a
measured weight attached to the tonometer balancing arm at 0, 2, and 6.
Explanation: This method involves attaching a small, precisely weighed rod to the
tonometer's balancing arm and checking the readings at specific dial positions
(typically 0, 2, and 6) to ensure the instrument is accurately measuring pressure.
4|Page
