Visual Field Defects

Question 1

Bitemporal hemianopia - lesion location + causes (3)

Answer 1

Optic chiasm lesion

• Pit tumour
• Craniopharyngoma

Question 2

Homonymous hemianopia - lesion location + causes (2)

Answer 2

Contralateral optic tract lesion

E.g middle cerebral artery occlusion

Question 3

Describe bitemportal hemianopia

Answer 3

Outer edges of both fields lost

Question 4

Describe homonymous hemianopia

Answer 4

Inner bits of both fields lost

Question 5

Homonymous inferior quadrantanopia - lesion location + causes (3)

Answer 5

Contralateral parietal superior optic radiation lesion

• Parietal stroke
• Parietal tumour

Question 6

Describe a homonymous inferior quadrantanopia

Answer 6

Inner bits of lower visual fields lost

Question 7

Describe a homonymous superior quadrantanopia

Answer 7

Inner bits of upper visual fields lost

Question 8

Homonymous superior quadrantanopia - lesion location + causes (3)

Answer 8

Contralateral parietal inferior optic radiation lesion

• Temporal stroke
• Temportal lesion

Question 9

Homonymous hemianopia with macular sparring location + causes (3)

Answer 9

Contralateral occipital visual cortex lesion

- Posterior cerebral artery occlusion