QuestionSBA
QuestionChoice
A lesion of the left optic radiation results in a contralateral homonymous quadrantanopia.
10026504
e
Left optic radiation
QuestionChoice
A lesion of the right optic nerve would result in ipsilateral vision loss in the right eye.
10026501
b
Right optic nerve
QuestionChoice
A lesion of the right optic tract results in a contralateral homonymous hemianopia.
10026503
d
Right optic tract
QuestionChoice
Lesions in the central optic chiasm would result in bitemporal hemianopia as the fibres from the nasal retina cross in the optic chiasm.
10026502
c
Optic chiasm
QuestionChoice
The patient has presented with a right-sided homonymous hemianopia, secondary to a likely brain tumour. A lesion of the left optic tract that carries axons from the ganglion cells of the temporal retina of the left eye and the nasal retina of the right eye (both see objects in the left visual hemifield) results in blindness in the right field of vision. The most common causes of homonymous hemianopias are vascular events, such as intracranial haemorrhages, followed by brain tumours, trauma, surgical intervention and central nervous system infections.
10026500
a
Left optic tract
Concept
Chapter
2693
4304
Visual Field Loss
Topic
141
Neurology
17698
A 65-year-old male presents to the GP with worsening visual acuity over months. He is a solicitor and is now struggling to read documents for his clients. He complains of vision loss in the right halves of his visual fields bilaterally. On wider questioning, he notes that he has been losing weight and has a daily headache, which is worse when coughing and sneezing.

Where is the lesion?
a