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.
Surgical problems can cause postoperative bleeding. For example, blood vessels may need to be secured, or stitches may have come apart. Injury to other organs may also have occurred during surgery. Health conditions, such as liver or kidney disease, or a bleeding disorder, such as hemophilia.