Periodic blurred vision after an angiogram is most likely due to a condition called “transient cortical blindness,” which is a rare complication where the contrast dye used during the procedure affects the brain’s visual cortex, causing temporary vision disturbances like blurring or complete loss of vision; this usually occurs due to the contrast agent impacting the blood-brain barrier, and symptoms can start during or shortly after the procedure and typically resolve within a few hours to days.
