Visual field defects

Question 1

Patient has a left homonymous hemianopia…

1) Describe/draw the visual field defect
2) Where is the lesion?

Answer 1

1) Entire left half of visual field is gone in both eyes

2) Right optic tract lesion

Question 2

Patient has right homonymous hemianopia…

1) Describe/draw the visual field defect
2) Where is the lesion?

Answer 2

1) Entire right half of visual field is gone in both eyes

2) Left optic tract lesion

Question 3

When thinking about a case of homonymous quadrantanopia, which mnemonic comes to mind?

Answer 3

PITS:

• Parietal Inferior
• Temporal Superior

Question 4

Patient has left superior homonymous quadrantanopia…

1) Describe/draw the visual field defect
2) Where is the lesion?

Answer 4

1) Top left quarter of visual field is gone in both eyes

2) Right temporal lobe lesion

Question 5

Patient has right inferior homonymous quadrantanopia…

1) Describe/draw the visual field defect
2) Where is the lesion?

Answer 5

1) Bottom right quarter of visual field is gone in both eyes

2) Left parietal lobe lesion

Question 6

Patient has bitemporal hemianopia…

1) Describe/draw the visual field defect
2) Where is the lesion?

Answer 6

1) Left eye = left side of visual field gone; right eye = right side of visual field gone
2) Optic chiasm

Question 7

Patient has normal vision in the left eye, but no vision in the right eye…

Where is the lesion?

Answer 7

Right optic nerve lesion

Question 8

Patient has normal vision in the right eye, but no vision in the left eye…

Where is the lesion?

Answer 8

Left optic nerve lesion

Question 9

Describe the visual field defect you would develop as a result of a…

i) Pituitary adenoma
ii) Craniopharyngioma

Answer 9

i) Bitemporal superior hemianopia

ii) Bitemporal inferior hemianopia