1|Page
CERTIFIED OPHTHALMIC TECHNICIAN (COT) EXAM
NEWEST 2026 ACTUAL EXAM TEST BANK|
CERTIFIED OPHTHALMIC TECHNICIAN
CERTIFICATION EXAM WITH COMPLETE 450 REAL
EXAM QUESTIONS AND CORRECT VERIFIED
ANSWERS/ ALREADY GRADED A+ (BRAND NEW!!)
When light passes through a transparent medium, it may travel straight
through (Transmission or its path may be altered. This altering or
bending property of a medium is known as:
a) Reflection
b) Refraction
c) Absorption
d) Tropism - Correct Answer -b) The quality of a medium to bend light is
called refraction. In reflection, the rays are bounced off of the surface. Absorbed
light does not pass through a medium. Tropism actually refers to the
phenomenon of plants bending toward a light source.
The ray of light that enters a transparent medium is termed:
a) Incident ray
b) Divergent ray
c) Emergent ray
d) Parallel ray - Correct Answer -a) The incident ray is the ray that first
strikes and enters a medium. A divergent ray has been refracted outward. The
emergent ray is the ray as it exits the medium. A parallel ray is straight.
pg. 1
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If light passes through a lens and the rays are spread apart on exiting,
this is known as:
a) a) Index of refraction (IR)
b) Convergence
c) Zero vergence
d) Divergence - Correct Answer -d) If the light is spread apart by the lens,
the rays are said to be divergent.
If light passes through a lens and the rays are bent toward each other on
exiting, this is known as:
a) IR
b) Convergence
c) Zero vergence
d) Divergence - Correct Answer -b) Convergence occurs when light rays are
brought together (bent inward) by the lens.
A comparison of the speed of light in air to the speed of light through a
substance is:
a) IR (Snell's Law)
b) Angle of refraction
c) Internal reflection
d) Optical interference - Correct Answer -a) The IR of a substance is found
by dividing the speed of light in air by the speed of light through the substance.
This is known as Snell's Law.
pg. 2
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The denser the substance, the more slowly light passes through it, and:
a) The lower the IR
b) The higher the IR
c) The more transparent it is
d) The more suitable it is for use as an ophthalmic lens - Correct Answer
-b) A substance with the high IR is more dense, and slows down the light
passing through it.
The IR of crown glass is:
a) 0
b) 1.00
c) 1.33
d) 1.50 - Correct Answer -d) Depending on which reference is consulted, the
IR of crown glass is 1.50. Light traveling through a vacuum is zero, through air is
1.0, and through water is 1.33.
Light travelling through a prism will be bent toward the prism's:
a) Apex
b) Base
c) Center
d) Smallest angle - Correct Answer -b) Light traveling through a prism is
bent toward the prism's base.
pg. 3
, 4|Page
The gland that lies in the chiasmal region and can have a direct impact
on the visual field is the:
a) Thyroid
b) Pituitary
c) Adrenal cortex
d) Hypothalamus - Correct Answer – b) Pituitary
The characteristic visual field defect due to a lesion at the chiasm is:
a) Bitemporal hemianopsia
b) Binasal hemianopsia
c) Left hemianopsia
d) Right hemianopsia - Correct Answer -a) Bitemporal hemianopsia
After nerve fibers cross at the chiasm, they pass next through the:
a) Lamina cribosa
b) Optic tract
c) Optic radiations
d) Optic nerve - Correct Answer -b) Optic tract
As the nerve fibers pass through the optic tract, they:
a) Intensify the light impulses
b) Rotate, thus changing position
pg. 4
CERTIFIED OPHTHALMIC TECHNICIAN (COT) EXAM
NEWEST 2026 ACTUAL EXAM TEST BANK|
CERTIFIED OPHTHALMIC TECHNICIAN
CERTIFICATION EXAM WITH COMPLETE 450 REAL
EXAM QUESTIONS AND CORRECT VERIFIED
ANSWERS/ ALREADY GRADED A+ (BRAND NEW!!)
When light passes through a transparent medium, it may travel straight
through (Transmission or its path may be altered. This altering or
bending property of a medium is known as:
a) Reflection
b) Refraction
c) Absorption
d) Tropism - Correct Answer -b) The quality of a medium to bend light is
called refraction. In reflection, the rays are bounced off of the surface. Absorbed
light does not pass through a medium. Tropism actually refers to the
phenomenon of plants bending toward a light source.
The ray of light that enters a transparent medium is termed:
a) Incident ray
b) Divergent ray
c) Emergent ray
d) Parallel ray - Correct Answer -a) The incident ray is the ray that first
strikes and enters a medium. A divergent ray has been refracted outward. The
emergent ray is the ray as it exits the medium. A parallel ray is straight.
pg. 1
,2|Page
If light passes through a lens and the rays are spread apart on exiting,
this is known as:
a) a) Index of refraction (IR)
b) Convergence
c) Zero vergence
d) Divergence - Correct Answer -d) If the light is spread apart by the lens,
the rays are said to be divergent.
If light passes through a lens and the rays are bent toward each other on
exiting, this is known as:
a) IR
b) Convergence
c) Zero vergence
d) Divergence - Correct Answer -b) Convergence occurs when light rays are
brought together (bent inward) by the lens.
A comparison of the speed of light in air to the speed of light through a
substance is:
a) IR (Snell's Law)
b) Angle of refraction
c) Internal reflection
d) Optical interference - Correct Answer -a) The IR of a substance is found
by dividing the speed of light in air by the speed of light through the substance.
This is known as Snell's Law.
pg. 2
,3|Page
The denser the substance, the more slowly light passes through it, and:
a) The lower the IR
b) The higher the IR
c) The more transparent it is
d) The more suitable it is for use as an ophthalmic lens - Correct Answer
-b) A substance with the high IR is more dense, and slows down the light
passing through it.
The IR of crown glass is:
a) 0
b) 1.00
c) 1.33
d) 1.50 - Correct Answer -d) Depending on which reference is consulted, the
IR of crown glass is 1.50. Light traveling through a vacuum is zero, through air is
1.0, and through water is 1.33.
Light travelling through a prism will be bent toward the prism's:
a) Apex
b) Base
c) Center
d) Smallest angle - Correct Answer -b) Light traveling through a prism is
bent toward the prism's base.
pg. 3
, 4|Page
The gland that lies in the chiasmal region and can have a direct impact
on the visual field is the:
a) Thyroid
b) Pituitary
c) Adrenal cortex
d) Hypothalamus - Correct Answer – b) Pituitary
The characteristic visual field defect due to a lesion at the chiasm is:
a) Bitemporal hemianopsia
b) Binasal hemianopsia
c) Left hemianopsia
d) Right hemianopsia - Correct Answer -a) Bitemporal hemianopsia
After nerve fibers cross at the chiasm, they pass next through the:
a) Lamina cribosa
b) Optic tract
c) Optic radiations
d) Optic nerve - Correct Answer -b) Optic tract
As the nerve fibers pass through the optic tract, they:
a) Intensify the light impulses
b) Rotate, thus changing position
pg. 4
