Visual System

Question 1

Damage to optic nerve causes…

Answer 1

Total visual loss in one eye

Question 2

Damage to optic chiasm causes…

Answer 2

loss of peripheral vision in both visual fields

Question 3

Damage to fibers of temporal aspect causes…

Answer 3

loss of the visual field covered by those fibers

Question 4

Damage in optic tract causes…

Answer 4

loss of visual field (half in both eyes)

Question 5

Damage in the lower optic radiation causes…

Answer 5

superior loss in visual field on contralateral side (a lesion on R side would lead to superior loss of L visual field)

Question 6

Damage in the upper optic radiation causes…

Answer 6

inferior loss in visual field on contralateral side (a lesion on R side would lead to inferior loss of L visual field)

Question 7

Damage in both the upper and lower optic radiation causes…

Answer 7

Contralateral homonymous – you will lose the whole visual space (both upper and lower)

Question 8

Photoreceptors

Answer 8

rods (light/dark) & cones (color)