Visual Pathway

Question 1

What is visual field?

Answer 1

Everything you can see with one eye including periphery

Question 2

How is visual field tested?

Answer 2

Confrontation test (outpatient)
Automated perimetry

Question 3

What would be expected if right optic nerve is damaged?

Answer 3

Blindness in one eye

Question 4

What would be expected if optic chiasma was disrupted in the middle?

Answer 4

Bitemporal hemianopia

Question 5

What would be expected in right optic tract is damaged?

Answer 5

Homonymous hemianopia

Question 6

What would be expected in optic radiation damage?

Answer 6

Contralateral homonymous hemianopia

Question 7

Where do all fibres from the eye travel?

Answer 7

Through the optic nerve to the optic chiasma

Question 8

What happens at the optic chiasma?

Answer 8

Medial nasal fibres cross to the opposite side

Question 9

What does the optic tract contain?

Answer 9

Fibres from the lateral temporal half of ipsilateral eye

Crossed over nasal fibres from contralateral eye

Question 10

Where do fibres from the optic tract synapse?

Answer 10

Lateral geniculate body (LGB) of the thalamus

Question 11

What happens after the optic tract synapses at LGB?

Answer 11

Optic radiation passes behind internal capsule to reach the primary visual cortex in the occipital lobe