COA Study Guide Test-2 Questions and
Answers with Rationale Top Rated Latest
Version 2026
What is the cause of a projected image to become dim on
one half of the acuity projector screen?
A. fingerprints are on the screen
B. fingerprints are on the bulb
C. the projector bulb is failing
D. the screen is dusty
C. the projector bulb is failing
The most likely reason for a projected image to become dim,
particularly on one half of the acuity projector screen is due to
impending bulb failure.
If dirt accumulates on the mirror of the slit lamp, the
technician may clean it by using all of the following EXCEPT:
A. a soft lint-free cloth
B. a lens brush
C. a blast of air
D. alcohol
D. alcohol
alcohol is not recommended for use in cleaning the mirror of the
slit lamp.
Which of the following statements regarding the accurate
measurement of visual acuity is TRUE?
A. Binocular acuity testing is more important than
monocular testing.
B. Patients who cannot see the largest letters on the
,distance acuity chart should be allowed to move closer
until they are able to read some of the letters.
C. The patient must be allowed to squint during the test to
attain his or her best visual image.
D. Patients who wear corrective lenses should NOT wear
them for the visual acuity test.
B. Patients who cannot see the largest letters on the distance
acuity chart should be allowed to move closer until they are able
to read some of the letters.
Patients which are unable to see even the largest Snellen letter
can repeat the distance visual acuity test at shorter distances.
The spherical equivalent of a (-2.00+3.00 x 090) lens is
A. -0.50
B. -1.50
C. +0.50
D. +1.50
A. -0.50
The spherical equivalent of a toric lens is calculated by taking the
algebraic sum of the full sphere power and one half the cylinder
power. Considered in optics as representing the dioptric power of
a spherical lens that best positions the circle of least confusion.
Lensometry always begins with
A. focusing the eyepiece
B. positioning the lenses
C. measuring the sphere power
D. measuring the cylinder power
A. focusing the eyepiece
Lensometry always begins with focusing the eyepiece in order to
compensate for the users's refractive error
,Keratometry is the procedure for measurement of the
patient's
A. pupil size
B. crystalline lens curvature
C. macular radius
D. corneal curvature
D. corneal curvature
The keratometer is an instrument that provides an objective
measure of the radius of curvature of the corneal surface in
dioptric optical power
The term ophthalmometer is also known as
A. goniometer
B. lens clock
C. keratometer
D. tonometer
C. keratometer
A keratometer is an ophthalmometer. Both are instruments that
provide an objective measure of the radius of curvature of the
corneal surface in dioptric optical power.
The purpose of the chin rest adjustment knob on the
keratometer is to
A. position the keratometer to the patient's eye below the
keratometer barrel
B. position the keratometer to the patient's eye roughly in
line with the keratometer barrel
C. position the keratometer to the patient's eye above the
keratometer barrel
D. position the patient in the ost comfortable way without
respect to the keratometer barrel.
, B. position the keratometer to the patient's eye
roughly in line with the keratometer barrel
The chin-rest adjustment knob on the keratometer can be used to
position the keratometer to the patient's eye roughly in line with
the keratometer barrel in order to allow quicker use of the height
adjustment knob in obtaining proper light reflections at the level of
the central cornea
Medical ethics are
A. not applicable to the ophthalmic assistant
B. a form of state law
C. a set of moral values
D. primarily for the benefit of the physician
C. a set of moral values
Medical ethics are moral principles and values that govern
physician behavior primarily for the benefit of the patient. Those
who assist the physician are expected to hold similar principles
and values.
The process by which a patient is able to make a
knowledgeable assessment of a specific medical or surgical
procedure is referred to as
A. informed consent
B. a law statue
C. standard setting
D. office information
A. informed consent
The process by which a patient is able to make a knowledgeable
assessment of a specific medical or surgical procedure is referred
to as informed consent. The physician has a duty to disuss with
Answers with Rationale Top Rated Latest
Version 2026
What is the cause of a projected image to become dim on
one half of the acuity projector screen?
A. fingerprints are on the screen
B. fingerprints are on the bulb
C. the projector bulb is failing
D. the screen is dusty
C. the projector bulb is failing
The most likely reason for a projected image to become dim,
particularly on one half of the acuity projector screen is due to
impending bulb failure.
If dirt accumulates on the mirror of the slit lamp, the
technician may clean it by using all of the following EXCEPT:
A. a soft lint-free cloth
B. a lens brush
C. a blast of air
D. alcohol
D. alcohol
alcohol is not recommended for use in cleaning the mirror of the
slit lamp.
Which of the following statements regarding the accurate
measurement of visual acuity is TRUE?
A. Binocular acuity testing is more important than
monocular testing.
B. Patients who cannot see the largest letters on the
,distance acuity chart should be allowed to move closer
until they are able to read some of the letters.
C. The patient must be allowed to squint during the test to
attain his or her best visual image.
D. Patients who wear corrective lenses should NOT wear
them for the visual acuity test.
B. Patients who cannot see the largest letters on the distance
acuity chart should be allowed to move closer until they are able
to read some of the letters.
Patients which are unable to see even the largest Snellen letter
can repeat the distance visual acuity test at shorter distances.
The spherical equivalent of a (-2.00+3.00 x 090) lens is
A. -0.50
B. -1.50
C. +0.50
D. +1.50
A. -0.50
The spherical equivalent of a toric lens is calculated by taking the
algebraic sum of the full sphere power and one half the cylinder
power. Considered in optics as representing the dioptric power of
a spherical lens that best positions the circle of least confusion.
Lensometry always begins with
A. focusing the eyepiece
B. positioning the lenses
C. measuring the sphere power
D. measuring the cylinder power
A. focusing the eyepiece
Lensometry always begins with focusing the eyepiece in order to
compensate for the users's refractive error
,Keratometry is the procedure for measurement of the
patient's
A. pupil size
B. crystalline lens curvature
C. macular radius
D. corneal curvature
D. corneal curvature
The keratometer is an instrument that provides an objective
measure of the radius of curvature of the corneal surface in
dioptric optical power
The term ophthalmometer is also known as
A. goniometer
B. lens clock
C. keratometer
D. tonometer
C. keratometer
A keratometer is an ophthalmometer. Both are instruments that
provide an objective measure of the radius of curvature of the
corneal surface in dioptric optical power.
The purpose of the chin rest adjustment knob on the
keratometer is to
A. position the keratometer to the patient's eye below the
keratometer barrel
B. position the keratometer to the patient's eye roughly in
line with the keratometer barrel
C. position the keratometer to the patient's eye above the
keratometer barrel
D. position the patient in the ost comfortable way without
respect to the keratometer barrel.
, B. position the keratometer to the patient's eye
roughly in line with the keratometer barrel
The chin-rest adjustment knob on the keratometer can be used to
position the keratometer to the patient's eye roughly in line with
the keratometer barrel in order to allow quicker use of the height
adjustment knob in obtaining proper light reflections at the level of
the central cornea
Medical ethics are
A. not applicable to the ophthalmic assistant
B. a form of state law
C. a set of moral values
D. primarily for the benefit of the physician
C. a set of moral values
Medical ethics are moral principles and values that govern
physician behavior primarily for the benefit of the patient. Those
who assist the physician are expected to hold similar principles
and values.
The process by which a patient is able to make a
knowledgeable assessment of a specific medical or surgical
procedure is referred to as
A. informed consent
B. a law statue
C. standard setting
D. office information
A. informed consent
The process by which a patient is able to make a knowledgeable
assessment of a specific medical or surgical procedure is referred
to as informed consent. The physician has a duty to disuss with
