7th July 2021

A 72-year-old woman attends A&E complaining of a headache and loss of vision

A 72-year-old woman attends A&E complaining of a headache and loss of vision. The headache began around 6 hours ago, and she describes it as a generalised ache. She noticed that the vision appears to have changed in her right eye, and when she looks into the light, she can see these “strange circles surrounding the light”. On examination, her right eye is visibly reddened with a dilated pupil. She is urgently referred to ophthalmology.

What is the gold standard diagnostic investigation for the most likely pathology?

Select the SINGLE most appropriate option from the list below. Select ONE option only.