Expected headings
"Blood supply"
"Historically, it has been believed that the crossing fibres made an anterior bend into the prechiasmatic optic nerve; this is known as Wilbrand knee. However, this has been suggested to possibly be artifactual ref."
"compressive lesions: lesions compressing the optic chiasm classically produce the visual field defect of bitemporal hemianopia, whereby there is loss of the temporal fields; this may be more common in a postfixed optic chiasm 5"