COT Visual Fields UPDATED ACTUAL
Questions and CORRECT Answers
Each mm on the retina is equal to how many degrees on the visual field? - CORRECT
ANSWER - 5 degrees
An object on the patient's right will be perceived by the patient's: - CORRECT ANSWER -
An object on the patient's right will stimulate the temporal retina of the left eye and the nasal
retina of the right eye. The foveae (plural of fovea) are used during central fixation, not for
peripheral vision.
The anatomic pattern of the nerve fibers produces visual field defects: - CORRECT
ANSWER - The correspond to the location of the nerve fibers. Because the nerve fibers
fan out in a specific anatomic pattern, visual fields defects occurring in the nerve fibers also
follow the same pattern. This makes diagnosis easier because the patters are identifiable.
The "blind spot" as plotted on a visual field test corresponds to: - CORRECT ANSWER -
The optic disk
The size of the average blind spot is: - CORRECT ANSWER - 5.5 degrees wide and 7.5
degrees high
On the visual field, the average blind spot is located: - CORRECT ANSWER - 15 degrees
temporal to fixation
If you increase the visual field testing distance, the blind spot will: - CORRECT
ANSWER - Get larger in cm but remain the same in degrees
At the chiasm: - CORRECT ANSWER - At the chiasm, the nasal fiber from each eye
cross over the other side. The temporal nerve fibers do not cross, but remain on the same side.
, The gland that lies in the chiasmal region and can have a direction impact on the visual is the: -
CORRECT ANSWER - Pituitary
The characteristic visual field defect due to a lesion at the chiasm is: - CORRECT
ANSWER - Bitemporal hemianopia
As the nerve fibers pass through the optic tract, they: - CORRECT ANSWER - Rotate,
thus changing position
After leaving the optic tract, the nerve fibers bundle together at a "relay station" known as the: -
CORRECT ANSWER - Lateral geniculate body
The layers of the lateral geniculate body nucleus are divided so that half of the layers are made
up of crossed fibers, and half are made up of uncrossed fibers. How many layers are there? -
CORRECT ANSWER - The later geniculate body has six layers; three are crossed and
three are uncrossed.
Which of the following is not true regarding the nerve fibers once they exit the lateral geniculate
body: - CORRECT ANSWER - The tract continues to rotate
Visual nerve fiber terminate at the: - CORRECT ANSWER - Occipital cortex
Visual field defects become more congruous: - CORRECT ANSWER - The closer the
lesion is to the occipital cortex
Sensory input (light impulses) on the patient's left is transmitted to the: - CORRECT
ANSWER - An object on the patient's left will stimulate the nasal retina OS and temporal
retina OD. The nasal fibers from OS will cross over to the right at the chiasm, while the temporal
fibers from OD will remain on the right. These fibers stay on the right as they pass through the
right optic tract, right lateral geniculate body, right optic radiations, and right occipital cortex.
Questions and CORRECT Answers
Each mm on the retina is equal to how many degrees on the visual field? - CORRECT
ANSWER - 5 degrees
An object on the patient's right will be perceived by the patient's: - CORRECT ANSWER -
An object on the patient's right will stimulate the temporal retina of the left eye and the nasal
retina of the right eye. The foveae (plural of fovea) are used during central fixation, not for
peripheral vision.
The anatomic pattern of the nerve fibers produces visual field defects: - CORRECT
ANSWER - The correspond to the location of the nerve fibers. Because the nerve fibers
fan out in a specific anatomic pattern, visual fields defects occurring in the nerve fibers also
follow the same pattern. This makes diagnosis easier because the patters are identifiable.
The "blind spot" as plotted on a visual field test corresponds to: - CORRECT ANSWER -
The optic disk
The size of the average blind spot is: - CORRECT ANSWER - 5.5 degrees wide and 7.5
degrees high
On the visual field, the average blind spot is located: - CORRECT ANSWER - 15 degrees
temporal to fixation
If you increase the visual field testing distance, the blind spot will: - CORRECT
ANSWER - Get larger in cm but remain the same in degrees
At the chiasm: - CORRECT ANSWER - At the chiasm, the nasal fiber from each eye
cross over the other side. The temporal nerve fibers do not cross, but remain on the same side.
, The gland that lies in the chiasmal region and can have a direction impact on the visual is the: -
CORRECT ANSWER - Pituitary
The characteristic visual field defect due to a lesion at the chiasm is: - CORRECT
ANSWER - Bitemporal hemianopia
As the nerve fibers pass through the optic tract, they: - CORRECT ANSWER - Rotate,
thus changing position
After leaving the optic tract, the nerve fibers bundle together at a "relay station" known as the: -
CORRECT ANSWER - Lateral geniculate body
The layers of the lateral geniculate body nucleus are divided so that half of the layers are made
up of crossed fibers, and half are made up of uncrossed fibers. How many layers are there? -
CORRECT ANSWER - The later geniculate body has six layers; three are crossed and
three are uncrossed.
Which of the following is not true regarding the nerve fibers once they exit the lateral geniculate
body: - CORRECT ANSWER - The tract continues to rotate
Visual nerve fiber terminate at the: - CORRECT ANSWER - Occipital cortex
Visual field defects become more congruous: - CORRECT ANSWER - The closer the
lesion is to the occipital cortex
Sensory input (light impulses) on the patient's left is transmitted to the: - CORRECT
ANSWER - An object on the patient's left will stimulate the nasal retina OS and temporal
retina OD. The nasal fibers from OS will cross over to the right at the chiasm, while the temporal
fibers from OD will remain on the right. These fibers stay on the right as they pass through the
right optic tract, right lateral geniculate body, right optic radiations, and right occipital cortex.
