Visual Field Deficits

Question 1

If an object is in the left visual field, where is this projected on a person’s retinas?

Answer 1

nasal left retina

temporal right retina

Question 2

If an object is in way out in the periphery, where does this project on a retina?

Answer 2

nasal retina of same side eye

Question 3

Which axons cross in the optic chiasm?

Answer 3

nasal retinal axons

Question 4

What is an anopsia?

Answer 4

large visual field deficit

Question 5

What is a scotoma?

Answer 5

small visual field deficit

Question 6

What does homonymous mean?

Answer 6

defect is on same side in both eyes

example: temporal on right and nasal on left

Question 7

What are two words that are more commonly used instead of heteronymous?

Answer 7

bitemporal or binasal

Question 8

What does congruous mean? incongruous?

Answer 8

congruous - defect is similar in both eyes

incongruous - defect is different in both eyes

Question 9

How would visual fields be affected by damage to the left optic nerve?

Answer 9

complete blindness in left eye

Question 10

How would visual fields be affected by damage to the middle of the chiasm?

Answer 10

peripheral loss in both eyes

bitemporal field defect

Question 11

How would visual fields be affected by damage to the right optic nerve, just anterior to the chasm?

Answer 11

Vision loss in right eye and a sector of the left eye visual field because of willebrand’s knee (looks like a “pie in the sky” in the left eye”

Question 12

Describe the visual field deficits usually produced by lesions to the lateral geniculate?

Answer 12

homonymous and may be incongruous

-vascular lesions - most common tend to cause a sector defect - sectoranopia

Question 13

How would visual fields be affected by damage to the left lateral geniculate ?

Answer 13

congruous right homonymous horizontal sectoronopia

Question 14

How would visual fields be affected by damage to a temporal lobe?

Answer 14

homonymous superior incomplete (contralateral)

double pie in the sky

Question 15

What is meyer’s loops?

Answer 15

optic radiations that loop into the temporal lobe as they head to the occipital lobe

Question 16

How would visual fields be affected by damage to a parietal lobe?

Answer 16

homonymous inferior (contralateral)
-tend to be more congruous than temporal lobe lesions

Question 17

How would you describe lesions in the occipital lobe?

Answer 17

homonymous and congruous and usually have macular sparing (central vision is spared)

Question 18

What would occur if there was a lesion to the posterior occipital lobe?

Answer 18

loss of vision in the central field

Question 19

How would visual fields be affected with a left upper bank lesion in the occipital lobe?

Answer 19

right homonymous inferior quaternopia

with macular sparing

Question 20

How would visual fields be affected with a lower bank lesion in the left occipital lobe?

Answer 20

right homonymous superior quaternopia with macular sparing

Question 21

How is a kinetics perimetry test performed?

Answer 21

test light moved towards center of vision from periphery until patient can detect it

Question 22

How is static perimetry performed?

Answer 22

a dim light is presented at a certain location than made brighter until it is seen

Question 23

What visual field test is inexpensive, fast, practical, and there is no standardized way of conducting it?

Answer 23

confrontation

Question 24

What visual field test can the patient bring home and use to see if they have blurriness or distortion in their visual field?

Answer 24

amsler grid

Question 25

Which part of the visual field does a tangent screen test for?

Answer 25

central 20 degrees of visual field

Question 26

Which two visual field tests are manual and kinetic?

Answer 26

tangent screen and goldmann perimeter

Question 27

What part of the visual field does the goldmann perimeter test?

Answer 27

entire visual field almost

Question 28

Which test is automated static perimetry?

Answer 28

humphrey perimeter

Question 29

What is an arcuate?

Answer 29

arc like shape defect produced by retinal nerve fiber bundle damage

Question 30

What word describes either a superior or inferior defect that respects the horizontal median?

Answer 30

altitudinal

Question 31

What word describes a nasal or temporal defect that splits vertically?

Answer 31

hemianopia

Question 32

What kind of defect occurs in glaucoma?

Answer 32

arcuate

Question 33

Where do macular fibers cross in the optic chiasm?

Answer 33

centrally and posterior

Question 34

Beyond the optic chiasm lesions tend to be___

Answer 34

homonymous

Question 35

The more posterior in the pathway that a lesion occurs, the defects tend to be ____

Answer 35

more congruous