Certified Ophthalmic Assistant (COA) Exam
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Ultrasound is a valuable diagnostic tool because it:
a - is safe because there is no radiation exposure
b - can be performed in the office
c - can be repeated frequently to follow the patient's condition
d - all of the above - correct answer-D. All of the above
Ultrasound employs use of:
a - light rays
b - sound waves
c - laser rays
d - electromagnetic waves - correct answer-b sound waves
The term A-scan refers to:
a - one-dimensional amplitude scan
b - two-dimensional brightness scan
c - three-dimensional scan
d - none of the above'l - correct answer-a one-dimensional amplitude scan
,It is best to remove a metallic corneal foreign body during the first 6 to 8 hours to
prevent:
a - sympathetic ophthalmia
b - formation of a rust ring
c - epidemic conjunctivitis
d - endophthalmotis - correct answer-b formation of rust ring
The "A" in A-scan stands for:
a - axial
b - amplitude
c - andi-orbital
d - audio - correct answer-a axial
The term biometry could refer to measuring the:
a - axial length of the eye
b - thickness of an extraocular muscle
c - height of a tumor
d - all of the above - correct answer-Axial length of the eye
In standardized or diagnostic A-scan, the purpose of the scan is generally to:
a - calculate intraocular lens power
b - calculate anterior chamber depth
c - evaluate abnormalities
d - evaluate the aqueous - correct answer-Calculate IOL power
,All of the following can result from trauma to the eye except:
a - blow out fracture
b - traumatic hyphema
c - retinal detachment
d - trachoma trachoma - correct answer-d trachoma
Before taking the fundus photograph, it is important to do all of the following
except:
a - crack the patient's record to confirm the photograph is required
b - enter patient information into a log manual or camera imprint system
c - study any previous fundus photos that the patient has had
d - make sure the patient had had a visual field test - correct answer-d - make
sure the patient had had a visual field test
A blow out fracture involves:
a - bones of the orbit and sinuses
b - globe rupture
c - airborne particles
d - bones of the cheek and forehead - correct answer-a bones of the orbit and
sinuses
In standardized/diagnostic A-scans, the probe tip is placed:
a - perpendicular to the visual axis
b - relative to the area of interest
c - so sound waves will fall on the macula
, d - so sound waves will fall on the optic nerve - correct answer-b ' to area of
interest
A hemorrhage in the anterior chamber is:
a - a subconjunctival hemorrhage
b - cells and flare
c - a hyphema
d - a vitreous hemorrhage - correct answer-C. Hyphema
Extra echoes between the anterior and posterior lens spikes indicate:
a - poor A-scan that should be repeated
b - a malfunctioning probe
c - a dense cataract
d - none of the above - correct answer-c a dense cataract
Which biometric measurements may be performed with the standardized A-scan?
a - axial eye length
b - optic nerve thickness
c - tumor height
d - all of the baove - correct answer-d all above
The organization involved with ensuring employee health and safety is: - correct
answer-OSHA
Unwanted echoes that do not represent ocular structures are known as:
2026/2027 – Comprehensive Ultimate Test Bank &
Review/ Pass Guaranteed
Ultrasound is a valuable diagnostic tool because it:
a - is safe because there is no radiation exposure
b - can be performed in the office
c - can be repeated frequently to follow the patient's condition
d - all of the above - correct answer-D. All of the above
Ultrasound employs use of:
a - light rays
b - sound waves
c - laser rays
d - electromagnetic waves - correct answer-b sound waves
The term A-scan refers to:
a - one-dimensional amplitude scan
b - two-dimensional brightness scan
c - three-dimensional scan
d - none of the above'l - correct answer-a one-dimensional amplitude scan
,It is best to remove a metallic corneal foreign body during the first 6 to 8 hours to
prevent:
a - sympathetic ophthalmia
b - formation of a rust ring
c - epidemic conjunctivitis
d - endophthalmotis - correct answer-b formation of rust ring
The "A" in A-scan stands for:
a - axial
b - amplitude
c - andi-orbital
d - audio - correct answer-a axial
The term biometry could refer to measuring the:
a - axial length of the eye
b - thickness of an extraocular muscle
c - height of a tumor
d - all of the above - correct answer-Axial length of the eye
In standardized or diagnostic A-scan, the purpose of the scan is generally to:
a - calculate intraocular lens power
b - calculate anterior chamber depth
c - evaluate abnormalities
d - evaluate the aqueous - correct answer-Calculate IOL power
,All of the following can result from trauma to the eye except:
a - blow out fracture
b - traumatic hyphema
c - retinal detachment
d - trachoma trachoma - correct answer-d trachoma
Before taking the fundus photograph, it is important to do all of the following
except:
a - crack the patient's record to confirm the photograph is required
b - enter patient information into a log manual or camera imprint system
c - study any previous fundus photos that the patient has had
d - make sure the patient had had a visual field test - correct answer-d - make
sure the patient had had a visual field test
A blow out fracture involves:
a - bones of the orbit and sinuses
b - globe rupture
c - airborne particles
d - bones of the cheek and forehead - correct answer-a bones of the orbit and
sinuses
In standardized/diagnostic A-scans, the probe tip is placed:
a - perpendicular to the visual axis
b - relative to the area of interest
c - so sound waves will fall on the macula
, d - so sound waves will fall on the optic nerve - correct answer-b ' to area of
interest
A hemorrhage in the anterior chamber is:
a - a subconjunctival hemorrhage
b - cells and flare
c - a hyphema
d - a vitreous hemorrhage - correct answer-C. Hyphema
Extra echoes between the anterior and posterior lens spikes indicate:
a - poor A-scan that should be repeated
b - a malfunctioning probe
c - a dense cataract
d - none of the above - correct answer-c a dense cataract
Which biometric measurements may be performed with the standardized A-scan?
a - axial eye length
b - optic nerve thickness
c - tumor height
d - all of the baove - correct answer-d all above
The organization involved with ensuring employee health and safety is: - correct
answer-OSHA
Unwanted echoes that do not represent ocular structures are known as:
