Visual Field Defects

Question 1

what is bitemporal hemianopia?

Answer 1

loss of temporal vision

Question 2

what causes bitemporal hemianopia?

Answer 2

optic chiasm lesion or compression

Question 3

what is homonymous hemianopia?

Answer 3

loss of right/left visual field in both eyes

Question 4

what causes homonymous hemianopia (e.g loss of right visual field in both eyes)?

Answer 4

optic tract lesion

left optic tract lesion in example

Question 5

what is a homonymous quadrantanopia?

Answer 5

loss of the same quadrant of visual field on both sides

Question 6

what causes a right superior quadrantanopia?

Answer 6

lesion in left temporal lobe

Question 7

what causes a left inferior quadrantanopia?

Answer 7

lesion in the right parietal lobe

Question 8

superior vs inferior quadrantanopia?

Answer 8

PITS
Parietal = inferior
Temporal = superior

Question 9

congruous hemianopia?

Answer 9

complete/symmetrical vision loss

Question 10

what causes a congruent homonymous hemianopia?

Answer 10

optic radiation or occipital cortex lesion

Question 11

what causes an incongruous homonymous hemianopia?

Answer 11

optic tract lesion

Question 12

what causes a left inferior quadrantanopia with macular sparing?

Answer 12

lesion in right occipital cortex

Question 13

how can you tell the difference between parietal lesion and occipital cortex lesion?

Answer 13

occipital cortex has macular sparing

Question 14

what causes total loss of vision in one eye?

Answer 14

lesion in optic nerve