MSRA: Visual Field Defects

Question 1

What visual field defect occurs due to a lesion of the optic chiasm?

Answer 1

Bitemporal hemianopia
If superior compression (e.g craniopharygioma) then inferior BH
If inferior compression (e.g pituitary tumour) then superior BH

Question 2

What visual field defect occurs due to a lesion of the left optic tract?

Answer 2

Right homonymous hemianopia

Question 3

What visual field defect occurs due to a lesion of the right optic tract?

Answer 3

Left homonymous hemianopia

Question 4

What visual field defect occurs due to a lesion of the left superior optic radiation?

Answer 4

Right superior quadrantanopia

Question 5

What visual field defect occurs due to a lesion of the left inferior optic radiation?

Answer 5

Right inferior quadrantanopia

Question 6

What visual field defect occurs due to a lesion of the right superior optic radiation?

Answer 6

Left superior quadrantanopia

Question 7

What visual field defect occurs due to a lesion of the right inferior optic radiation?

Answer 7

Left inferior quadrantanopia

Question 8

The inferior optic radiations pass through which lobe of the brain?

Answer 8

Parietal lobe

Question 9

The superior optic radiations pass through which lobe of the brain?

Answer 9

Temporal lobe

Question 10

What are the features of optic neuritis?

Answer 10

Decrease in visual acuity
Poor red-green colour discrimination
Pain worse with eye movements
RAPD
Central scotoma