1|Page
Certified Ophthalmic Assistant
(COA) 2026| Complete Exam Set
With Questions And Verified
Answers
How is anterior chamber angle depth estimated using a slit lamp? - correct-
answer - A thin light beam is placed at the limbus at an angle of approximately
60° and the distance between the posterior limit of the corneal beam and the
anterior limit of the iris beam is compared with the thickness of the optical
section of the cornea
Which two ocular structures can touch of the anterior chamber is flat? - correct-
answer - Iris and cornea
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When determining anterior chamber depth using a flashlight test, a shadow on
the nasal iris indicates ____. - correct-answer - Abnormally shallow anterior
chamber (narrow angle)
Ophthalmologists often estimate anterior chamber depth by measuring the angle
between the ____ and ____ - correct-answer - Anterior surface of the iris,
posterior surface of the cornea
Which color vision test consists of pseudo isochromatic plated that determine
red-green color anomalies and deficiencies? - correct-answer - Ishihara
Which color defects may be distinguished by the Ishihara test? - correct-answer -
Red and green
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How long are the Schirmer strips left in place during s tear test? - correct-answer -
5 minutes
A-Scan biometry measures the distance between ____ - correct-answer - Internal
ocular surfaces
The chief use of A-Scan biometric is to measure the ____ ____ of the eye -
correct-answer - Axial length
Jaeger notation, the point system, and the Snellen M Unit are units of measure
used in recording ____ visual acuity. - correct-answer - Near
In the visual assessment the acronym PAM represents the principal testing device
known as the ____. - correct-answer - Potential Acuity Meter
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The ability of human vision to discern shapes by their relative lightness and
darkness is termed____. - correct-answer - Contrast sensitivity
During visual acuity assessment the patient is able to clearly read the 20/20 line
but misses one letter, the acuity is recorded as ____. - correct-answer - 20/20-1
Why is it important to observe the patient during visual acuity testing? - correct-
answer - To ensure proper occlusion
What drug classification is contraindicated in patient's with obstructive
pulmonary disease or cardiovascular disease? - correct-answer - Beta blockers
Certified Ophthalmic Assistant
(COA) 2026| Complete Exam Set
With Questions And Verified
Answers
How is anterior chamber angle depth estimated using a slit lamp? - correct-
answer - A thin light beam is placed at the limbus at an angle of approximately
60° and the distance between the posterior limit of the corneal beam and the
anterior limit of the iris beam is compared with the thickness of the optical
section of the cornea
Which two ocular structures can touch of the anterior chamber is flat? - correct-
answer - Iris and cornea
,2|Page
When determining anterior chamber depth using a flashlight test, a shadow on
the nasal iris indicates ____. - correct-answer - Abnormally shallow anterior
chamber (narrow angle)
Ophthalmologists often estimate anterior chamber depth by measuring the angle
between the ____ and ____ - correct-answer - Anterior surface of the iris,
posterior surface of the cornea
Which color vision test consists of pseudo isochromatic plated that determine
red-green color anomalies and deficiencies? - correct-answer - Ishihara
Which color defects may be distinguished by the Ishihara test? - correct-answer -
Red and green
,3|Page
How long are the Schirmer strips left in place during s tear test? - correct-answer -
5 minutes
A-Scan biometry measures the distance between ____ - correct-answer - Internal
ocular surfaces
The chief use of A-Scan biometric is to measure the ____ ____ of the eye -
correct-answer - Axial length
Jaeger notation, the point system, and the Snellen M Unit are units of measure
used in recording ____ visual acuity. - correct-answer - Near
In the visual assessment the acronym PAM represents the principal testing device
known as the ____. - correct-answer - Potential Acuity Meter
, 4|Page
The ability of human vision to discern shapes by their relative lightness and
darkness is termed____. - correct-answer - Contrast sensitivity
During visual acuity assessment the patient is able to clearly read the 20/20 line
but misses one letter, the acuity is recorded as ____. - correct-answer - 20/20-1
Why is it important to observe the patient during visual acuity testing? - correct-
answer - To ensure proper occlusion
What drug classification is contraindicated in patient's with obstructive
pulmonary disease or cardiovascular disease? - correct-answer - Beta blockers
