Visual Field Defects Flashcards Preview

Opthalmology > Visual Field Defects > Flashcards

Flashcards in Visual Field Defects Deck (14)
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1
Q

What can cause damage to the optic nerve

A

Ischaemic Optic Neuropathy
Optic Neuritis - common in MS
Tumours (rarely) - meningioma, glioma, haemagioma

2
Q

What visual defect is seen in an optic nerve damage

A

Either complete or abide the horizontal of the affected eye

3
Q

What is optic neuritis

A
Progressive unilateral vision loss 
pain behind the eye on movement
colour desaturation 
central scotoma (blind spot)
gradual recovery over weeks - months
4
Q

What can occur due to optic neuritis

A

optic atrophy

5
Q

What usually causes damage to the optic chiasm

A

pituitary tumour
craniopharyngioma
menigioma

6
Q

What happens if there is a obstuction at the optic chiasm

A

bitemporal field defect

7
Q

What usually happens to vision after the removal of the pituitary tumour

A

vision recovers

8
Q

What usually happens to vision after the removal of the pituitary tumour

A

vision recovers

9
Q

What usually causes damage to the optic tracts?

A

tumours
demyelination
vascular anomalies

10
Q

What happens to the visual field if a tract is affected

A

Homonomous defect

Macula is not spared

11
Q

What happens to the visual field if a tract is affected

A

Homonomous defect

Macula is not spared

12
Q

What happens if a radiation is affected

A

quadranopia occurs

13
Q

What can damage your occipital cortex

A

vascular disease

demyelination

14
Q

What do occipital cortex damages cause

A

homonomous defect
macular sparing
congruous