Visual Field Defects

Question 1

causes

Answer 1

vascular disease
SOL
demyelination (MS)
trauma (including surgery)

Question 2

what are different parts of the visual pathway that can be affected?

Answer 2

optic nerve
optic chiasm
optic tracts/radiations
occipital cortex

Question 3

causes of optic nerve being affected

Answer 3

ischaemic optic neuropathy is seen in old people wither cardiovascular risk factors and GCA
MS
tumours

Question 4

presentation of optic neuritis

Answer 4

progressive visual loss (unilateral)
pain on eye movement
painful loss of vision 1-2 weeks
colour desaturation
central scotoma (peripheral vision spared)
gradual recovery (optic atrophy follows)

Question 5

causes of optic chiasm defects

Answer 5

pituitary tumours
craniopharyngioma
meningioma

Question 6

presentation of optic chiasm defect

Answer 6

bitemporal hemianopia

Question 7

what can affect the optic tracts?

Answer 7

tumours
demyelination
vascular abnormalities

Question 8

presentation of optic tracts being affected

Answer 8

homonomous defect
macula not spared
quadrantanopia
incongruous

Question 9

what can affect the occipital cortex?

Answer 9

vascular disease (CVA)
demyelination

Question 10

presentation of occipital cortex problems

Answer 10

homonous defect
macular sparing (large area/ dual blood supply)
congruous