Visual field loss

Question 1

What would a lesion of the optic nerve cause?

Answer 1

Complete loss of vision in 1 eye

Question 2

What would a lesion in the optic chiasm cause?

Answer 2

Bi-temporal hemianopia

Question 3

What is the pattern of vision in this condition?

Answer 3

Loss of temporal (lateral) fields in both eyes

Question 4

What would a lesion to the optic tract cause?

Answer 4

Contralateral homonymous hemianopia

Question 5

What is the pattern of vision in this condition?

Answer 5

Loss of left or right side of vision in both eyes

Question 6

1) What would a lesion to the temporal lobe cause?
2) What would a lesion to the parietal lobe cause?
3) What would a lesion to the occipital lobe cause?

Answer 6

1) Contralateral homonymous superior quadrantanopia
2) Contralateral homonymous inferior quadrantanopia
3) Contralateral homonymous hemianopia

Question 7

1) If there’s bitemporal hemianopia, but the lower quadrants are affected the most, what is the most likely diagnosis?
2) If there’s bitemporal hemianopia, but the superior quadrants are affected the most, what is the most likely diagnosis?

Answer 7

1) Craniopharyngioma (superior chiasmal compression)
2) Pituitary tumour (inferior chiasmal compression)