MRCP2-2978

A 70-year-old man presented to the optician with a gradual decline in vision and a headache. Upon examination, the optician noticed concerning fundoscopic appearance and referred him to the emergency department for further evaluation. The patient has a history of hypertension and diabetes, but reports good adherence to his medications including perindopril, amlodipine, hydrochlorothiazide, metformin, linagliptin, and dapagliflozin.

What would be the most appropriate next step in managing this patient?