In view of subsequent events it would be difficult to find a more interesting subject of inquiry than the internal religious and sociological conditions in Samaria at this age.
Its incidence following spine surgeries exceeds that after cardiothoracic surgeries. Various causes attributed to postoperative blindness include ischemic optic neuropathy, central or branch retinal artery occlusion, cortical blindness, and rarely external ocular injury.
Posttraumatic transient cortical blindness is thought to be due to transient hypoxia and cerebral dysfunction.In these cases, vision returns to normal within minutes to hours, with no permanent neurologic sequelae. Occasionally, transient visual loss is familial.