Can pres cause permanent cortical blindness?

Usually reversible. Posterior reversible encephalopathy syndrome (pres) is a syndrome characterized by headache, confusion, seizures and visual loss. There have been reported cases presenting with cortical blindness with near or complete recovery of vision. There are many implicated causes, including ecclampsia, malignant hypertension, tacrolimus and Cyclosporine use, hypercalcemia. Treatment depends on the cause.