Heat and visual data are sent, via the optic nerve, to the pit-viper's brain, where the two types of data are transposed into a single image.

The optic nerve has been known to contain both sensory and motor fibres since the work of Bethe 1, who suggested a purely motor function for the oculomotor nerve.

Purpose: To determine the clinical features of optic disc progression in patients ... of the neuroretinal rim or disc margin), and nerve fiber layer defect(s). They also determined the location ...