Certified Ophthalmic Technician Exam
Review - COT Ophthalmology Chapter 4
Visual Fields Newest Update 2025/2026/ A+
Grade
Each mm on the retina is equal to how many degrees on the
visual field? - ANSWER-5 degrees
The light receptor cells of the retina are the: - ANSWER-Rods
and cones
An object on the patient's right will be perceived by the
patient's: - ANSWER-temporal retina OS and nasal retina OD
The nerve fibers are axon extensions of the: - ANSWER-
Ganglion cells
Which of the following has no resulting field loss? - ANSWER-
ocular hypertension
enlargement of the blind spot might typically be expected to
occur in all of the following conditions except, glaucoma,
retinal detachment, papilledema or optic nerve coloboma? -
ANSWER-retinal detachment
,except in glaucoma enlargement of the blind spot caused by
optic nerve damage generally is? - ANSWER-rounded or
concentric
The most common visual field defect found in optic nerve
damage is: - ANSWER-central scotoma
Optic nerve damage that causes a visual field defect in both
eyes cannot occur anterior to: - ANSWER-the junction of the
optic nerve and the chiasm
All of the following regarding field loss in optic neuritis are
true except: - ANSWER-field loss is permanent
Optic disc drusen can cause field defects that mimic: -
ANSWER-glaucoma
the most common field defect in optic disc drusen is? -
ANSWER-inferior nasal step
A patient taking plaquenil should have periodic visual field
examinations to check for: - ANSWER-paracentral scotoma
,Which areas are most important when screening for
glaucoma defects - ANSWER-Nasal, central 20 degrees, and
blind spot
The standard perimetric screening technique for detecting
glaucomtous defects is: - ANSWER-Armaly/Drance
Changes in the visual field of the glaucoma patient
correspond to: - ANSWER-The progression of nerver fiber
bundle damage at the rim of the optic disc
The nasal contraction seen in the glaucomatous field is: -
ANSWER-a superior nasal step
The most common intial field losses see in in open angle
glaucoma is are - ANSWER-paracentral scotoma and nasal
step
The Bjerrum scotomas seen in open-angle glaucoma occur
in which eccentricity - ANSWER-15 degrees
The very last area of the visual field remaining in end-stage
glaucoma is the: - ANSWER-temporal crescent
, In general the more congrous the defect, the more likely
that the problem site is: - ANSWER-more posterior located
One hallmark of the neurological field is: - ANSWER-respect
for the vertical meridian
A total homonymous hemianopsia can occur in all of the
following except: - ANSWER-the optic nerve
bitemporal field defects can occur only in the? - ANSWER-
chiasm
Pie-in-the sky and pie on the floor defects are indication of
damage in the: - ANSWER-optic radiation
Scintillating scotoma are sometimes seen in: - ANSWER-
Migraines
field patterns typical of a hysterical pt include all of the
following except, spiral, star shaped, tubular? - ANSWER-
square
hysterical visual field loss is usually a product of? -
ANSWER-mental conflict
Review - COT Ophthalmology Chapter 4
Visual Fields Newest Update 2025/2026/ A+
Grade
Each mm on the retina is equal to how many degrees on the
visual field? - ANSWER-5 degrees
The light receptor cells of the retina are the: - ANSWER-Rods
and cones
An object on the patient's right will be perceived by the
patient's: - ANSWER-temporal retina OS and nasal retina OD
The nerve fibers are axon extensions of the: - ANSWER-
Ganglion cells
Which of the following has no resulting field loss? - ANSWER-
ocular hypertension
enlargement of the blind spot might typically be expected to
occur in all of the following conditions except, glaucoma,
retinal detachment, papilledema or optic nerve coloboma? -
ANSWER-retinal detachment
,except in glaucoma enlargement of the blind spot caused by
optic nerve damage generally is? - ANSWER-rounded or
concentric
The most common visual field defect found in optic nerve
damage is: - ANSWER-central scotoma
Optic nerve damage that causes a visual field defect in both
eyes cannot occur anterior to: - ANSWER-the junction of the
optic nerve and the chiasm
All of the following regarding field loss in optic neuritis are
true except: - ANSWER-field loss is permanent
Optic disc drusen can cause field defects that mimic: -
ANSWER-glaucoma
the most common field defect in optic disc drusen is? -
ANSWER-inferior nasal step
A patient taking plaquenil should have periodic visual field
examinations to check for: - ANSWER-paracentral scotoma
,Which areas are most important when screening for
glaucoma defects - ANSWER-Nasal, central 20 degrees, and
blind spot
The standard perimetric screening technique for detecting
glaucomtous defects is: - ANSWER-Armaly/Drance
Changes in the visual field of the glaucoma patient
correspond to: - ANSWER-The progression of nerver fiber
bundle damage at the rim of the optic disc
The nasal contraction seen in the glaucomatous field is: -
ANSWER-a superior nasal step
The most common intial field losses see in in open angle
glaucoma is are - ANSWER-paracentral scotoma and nasal
step
The Bjerrum scotomas seen in open-angle glaucoma occur
in which eccentricity - ANSWER-15 degrees
The very last area of the visual field remaining in end-stage
glaucoma is the: - ANSWER-temporal crescent
, In general the more congrous the defect, the more likely
that the problem site is: - ANSWER-more posterior located
One hallmark of the neurological field is: - ANSWER-respect
for the vertical meridian
A total homonymous hemianopsia can occur in all of the
following except: - ANSWER-the optic nerve
bitemporal field defects can occur only in the? - ANSWER-
chiasm
Pie-in-the sky and pie on the floor defects are indication of
damage in the: - ANSWER-optic radiation
Scintillating scotoma are sometimes seen in: - ANSWER-
Migraines
field patterns typical of a hysterical pt include all of the
following except, spiral, star shaped, tubular? - ANSWER-
square
hysterical visual field loss is usually a product of? -
ANSWER-mental conflict
