Rarely, 0.3 to 1% of the cases experience cortical blindness from 3 minutes to 12 hours after the procedure. It is a condition where those affected experienced loss of vision with normal pupillary light reflex, and normal extraocular muscles movement. The condition can sometimes be accompanied by headaches, mental state changes, and memory losses.
Cerebral angiography
Perfusion scanning
Vertebral artery test
Carotid ultrasonography
Thrombodynamics test
Microangiography
Perfusion MRI
Intravascular imaging