Contrast media induced transient cortical blindness.
Learning points for clinicians

Transient cortical blindness is a rare complication of contrast media use seen in cerebral and coronary angiography. Computed tomography typically shows occipital gyral and subarachnoid hyperdensity. The blindness is self-limiting, resolving within 2–4 days of onset.

A 60-year-old man who had previous coronary artery bypass graft surgery with a left internal mammary artery (LIMA) graft, underwent a coronary angiogram to investigate multiple episodes of angina. His only other significant past medical history was well-controlled hypertension. The patient was previously exposed to iodinated contrast media with no history of reaction. His pre-procedural blood pressure and renal function was noted to be normal. No premedication was used. During injection of the LIMA, the patient …