13th February 2025

You are asked to examine a patient with chronic visual loss with a direct ophthalmoscope.

You are asked to examine a patient with chronic visual loss with a direct ophthalmoscope. On assessment you can see a cup-to-disc ratio of 0.3, pink healthy neuroretinal rim and a clear optic disc margin. However, you note that there are fronds of blood vessels emanating from the optic disc which appear thinner than normal vasculature and radiate in random patterns. Which of the following investigations is most likely to reveal the underlying cause?

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