QuestionSBA
QuestionChoice
This vignette describes peripheral vision loss, essentially a bitemporal hemianopia. If the right optic nerve is damaged, the patient will experience complete right vision loss. This is because the right optic nerve fibres transmit visual signals from the whole of the right eye to the optic tract.
10025256
b
Right optic nerve
QuestionChoice
This vignette describes peripheral vision loss, essentially a bitemporal hemianopia. If the right optic tract is damaged, the patient would experience left (contralateral) homonymous hemianopia, meaning the loss of the left half of the visual fields of both eyes. This is because the right optic tract carries nerve signals from the right half of both retinas, which receives visual signals from the left half of the visual fields.
10025258
d
Right optic tract
QuestionChoice
This vignette describes peripheral vision loss, essentially a bitemporal hemianopia. If the left optic nerve is damaged, the patient will experience complete left vision loss. This is because the left optic nerve fibres transmit visual signals from the whole of the left eye to the optic tract.
10025257
c
Left optic nerve
QuestionChoice
This vignette describes peripheral vision loss, essentially a bitemporal hemianopia. If the left optic tract is damaged, the patient would experience right (contralateral) homonymous hemianopia, meaning the loss of the right half of the visual fields on both eyes. This is because the left optic tract carries nerve signals from the left half of both retinas, which receives visual signals from the right half of the visual fields.
10025259
e
Left optic tract
QuestionChoice
This is the correct answer. This vignette describes peripheral vision loss or bitemporal hemianopia. Visual signals from the temporal (outer) sides of each eye are transmitted to the nasal part of the retina. The optic nerve fibres transmit the signal and cross at the optic chiasm to opposite sides of the brain. Therefore, damage or pressure at the optic chiasm could create a tunnel-like visual experience, with the central vision intact.
10025255
a
Optic chiasm
Concept
Chapter
2693
4304
Visual Field Loss
Topic
141
Neurology
17449
A 43 year old woman schedules an appointment with her ophthalmologist due to concerning changes in her vision. She explains that over the past few weeks, she had been experiencing a persistent issue that is particularly noticeable while driving. She mentioned that when she was on the road, she had difficulty seeing objects and pedestrians at the side of her vision, like having 'tunnel vision'.

Which of the following is the most likely site of pathology?
a