visual field defects

Question 1

superior homonymous quadrantopia

Answer 1

lesion of temporal lobe

Question 2

inferior homonymous quadrantopia

Answer 2

lesion of parietal lobe

Question 3

upper quadrant bitemporal hemianopia

Answer 3

inferior chiasmal compression, commonly a pituitary tumour

Question 4

lower quadrant bitemporal hemianopia

Answer 4

superior chiasmal compression, commonly a craniopharyngioma

Question 5

optic nerve lesion features

Answer 5

monocular vision
maybe pain with movement of the eye 
reduced visual acuity
reduction of colour vision
central scotoma
afferent pupillary defect may be present

Question 6

causes of optic neuropathy

Answer 6

optic neuritis - MS, SLE, wegners

vascular - ischaemic optic neuropathy

SOL

toxins - alcohol, tobacco, amiodarone, ethambutol

Vit B12 deficiency and B1 folate

genetic - lebers

raised ICP - long standing papilloedema

trauma

Question 7

most common cause of amaurosis fugax

Answer 7

atheroma of the ipsilateral carotid artery -> embolism into the CRA

Question 8

causes of acute transient visual impairment

Answer 8

amaurosis fugax
migraine with aura
papilloedema