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.
The main cause of childhood blindness in the developing world is corneal. opacification resulting from measles, Vitamin A deficiency and the use of traditional eye. medicines whereas the main causes in the USA are cortical visual impairment, retinopathy of prematurity and optic nerve hypoplasia.