31st December 2023

A diabetic patient presents complaining of right-sided swelling and drooping of the eyelids

A diabetic patient presents complaining of right-sided swelling and drooping of the eyelids, decreased vision and pain on eye movements. He has had uncontrolled hyperglycaemia recently due to being ill with a dental abscess. On examination, there is right-sided peri-orbital swelling, mild proptosis, conjunctival hyperaemia and sluggish pupillary reactivity to light. Ocular movements on the right are limited by pain. What investigation is urgently needed in this patient?

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