Certified Ophthalmic Assistant (COA)
Exam Questions and Answers
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 - answer-D. All of the above
Ultrasound employs use of:
a - light rays
b - sound waves
c - laser rays
d - electromagnetic waves - 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 - 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 - answer-b formation of rust ring
The "A" in A-scan stands for:
a - axial
b - amplitude
c - andi-orbital
d - audio - 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - answer-d all above
The organization involved with ensuring employee health and safety is: - answer-
OSHA
Unwanted echoes that do not represent ocular structures are known as:
a - pseudo-echoes
b - artifacts
c - reverberations
d - echoes of confusion - answer-b artifacts '
,All of the following are true regarding computerized corneal topography except:
a - it evaluates four points of the corneal apex
b - it measures the curvature of the anterior cornea
c - it displays the results with a color-coded "map"
d - it analyzes light reflected from the cornea - answer-a 4 points of the corneal apex
Corneal topography is useful in each of the following except:
a - fitting rigid contact lenses
b - monitoring keratoconus
c - monitoring endothelial drop-out
d - preoperative refractive surgery evaluation - answer-c monitoring endothelial drop-
out
You are concerned about the possible toxicity of a lens cleaner you use. Where can
you look for information? - answer-the Safety Data Sheet (SDS) file
"Cold" colors (blues and greens)b on a corneal topography map indicate which of the
following?
a - a flatter area
b - a steeper area
c - an area of irregularity
d - the apex of a cone - answer-a a flatter area
An employer's written plan detailing expectations and procedures for the clinic would
be the office's: - answer-Standard Operating Procedures
The common pattern on astigmatism on a corneal topography map is a:
a - ring
b - tear-drop shape
c - bow-tie shape
d - pie wedge shape - answer-C- Bow tie shape
A patient falls in your clinic. The practice will fill out a(n): - answer-Incident report
Potential candidates for refractive surgery who currently wear contact lenses:
a - may have to leave the lenses out and have repeat cornea topography
b - do not need to report topography if they are wearing soft lenses
c - should have corneal topography performed while wearinf the contact lenses
d - should use rewetting drops frequently prior to topography - answer-a remove
lenses & repeat cornea topography
All of the following are common indications of viral conjunctivitis except:
a - photophobia
b - recent sore throat
c - moderate redness
d - yellow crusting - answer-d. yellow crusting
All of the following are true regarding epidemic keratoconjunctivitis (EKC) except:
a - it is highly contagious
, b - it is caused by a bacterium
c - the cornea is usually involved
d - it is also known as "shipyard eye" - answer-b. it is caused by a bacterium
An assessment that makes a statement about a patient's ability/inability to perform
tasks that he or she needs and wants to do is an evaluation of:
a - impairment
b - disability
c - qualification
d - vision loss - answer-b disability
The corneal topography map most commonly used is the:
a - Placido ring map
b - keratometry map
c - refractive map
d - axial map - answer-d. axial map
The type of conjunctivitis caused by constant irritation (such as contact lens) is:
a - episcleritis
b - scleritis
c - uveitis
d - iritis - answer-b scleritis
Corneal topography is useful in each of the following except:
a - evaluation of corneal sensitivity
b - evaluation of corneal warpage
c - evaluation of high astigmatism
d - determination of the incision site for cataract surgery - answer-a - corneal
sensitivity evaluation
Protrusion of the eyeball is known as:
a - exophthalmos
b - keratoconus
c - buphthalmos
d - ptosis - answer-a exophthalmos
A cream colored arc in the cornea at the limbus that may be related to cholesterol is:
a - toxic pemphigoid
b - keratoconus
c - drug reaction
d - arcus - answer-d. arcus
The purpose of the government required forms regarding ocular health is generally
to:
a - determine fault
b - determine eligibility
c - eliminate malingering
d - justify legal prosecution - answer-b determine eligibility
The extent of vision beyond the fixation point is known as the:
Exam Questions and Answers
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 - answer-D. All of the above
Ultrasound employs use of:
a - light rays
b - sound waves
c - laser rays
d - electromagnetic waves - 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 - 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 - answer-b formation of rust ring
The "A" in A-scan stands for:
a - axial
b - amplitude
c - andi-orbital
d - audio - 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - answer-d all above
The organization involved with ensuring employee health and safety is: - answer-
OSHA
Unwanted echoes that do not represent ocular structures are known as:
a - pseudo-echoes
b - artifacts
c - reverberations
d - echoes of confusion - answer-b artifacts '
,All of the following are true regarding computerized corneal topography except:
a - it evaluates four points of the corneal apex
b - it measures the curvature of the anterior cornea
c - it displays the results with a color-coded "map"
d - it analyzes light reflected from the cornea - answer-a 4 points of the corneal apex
Corneal topography is useful in each of the following except:
a - fitting rigid contact lenses
b - monitoring keratoconus
c - monitoring endothelial drop-out
d - preoperative refractive surgery evaluation - answer-c monitoring endothelial drop-
out
You are concerned about the possible toxicity of a lens cleaner you use. Where can
you look for information? - answer-the Safety Data Sheet (SDS) file
"Cold" colors (blues and greens)b on a corneal topography map indicate which of the
following?
a - a flatter area
b - a steeper area
c - an area of irregularity
d - the apex of a cone - answer-a a flatter area
An employer's written plan detailing expectations and procedures for the clinic would
be the office's: - answer-Standard Operating Procedures
The common pattern on astigmatism on a corneal topography map is a:
a - ring
b - tear-drop shape
c - bow-tie shape
d - pie wedge shape - answer-C- Bow tie shape
A patient falls in your clinic. The practice will fill out a(n): - answer-Incident report
Potential candidates for refractive surgery who currently wear contact lenses:
a - may have to leave the lenses out and have repeat cornea topography
b - do not need to report topography if they are wearing soft lenses
c - should have corneal topography performed while wearinf the contact lenses
d - should use rewetting drops frequently prior to topography - answer-a remove
lenses & repeat cornea topography
All of the following are common indications of viral conjunctivitis except:
a - photophobia
b - recent sore throat
c - moderate redness
d - yellow crusting - answer-d. yellow crusting
All of the following are true regarding epidemic keratoconjunctivitis (EKC) except:
a - it is highly contagious
, b - it is caused by a bacterium
c - the cornea is usually involved
d - it is also known as "shipyard eye" - answer-b. it is caused by a bacterium
An assessment that makes a statement about a patient's ability/inability to perform
tasks that he or she needs and wants to do is an evaluation of:
a - impairment
b - disability
c - qualification
d - vision loss - answer-b disability
The corneal topography map most commonly used is the:
a - Placido ring map
b - keratometry map
c - refractive map
d - axial map - answer-d. axial map
The type of conjunctivitis caused by constant irritation (such as contact lens) is:
a - episcleritis
b - scleritis
c - uveitis
d - iritis - answer-b scleritis
Corneal topography is useful in each of the following except:
a - evaluation of corneal sensitivity
b - evaluation of corneal warpage
c - evaluation of high astigmatism
d - determination of the incision site for cataract surgery - answer-a - corneal
sensitivity evaluation
Protrusion of the eyeball is known as:
a - exophthalmos
b - keratoconus
c - buphthalmos
d - ptosis - answer-a exophthalmos
A cream colored arc in the cornea at the limbus that may be related to cholesterol is:
a - toxic pemphigoid
b - keratoconus
c - drug reaction
d - arcus - answer-d. arcus
The purpose of the government required forms regarding ocular health is generally
to:
a - determine fault
b - determine eligibility
c - eliminate malingering
d - justify legal prosecution - answer-b determine eligibility
The extent of vision beyond the fixation point is known as the:
