This PDF covers the optic nerve (CN II) and provides an overview of how visual information is transmitted from the retina to the brain. Each part of the visual pathway is depicted in simplified diagrams, including the optic nerve, optic chiasma, optic tract, and optic radiations, with supporting diagrams explaining the neuronal order, visual fields, and functional connections. Topics include the course of the visual pathway, collateral reflex pathways, and clinical conditions such as hemianopia, quadrantanopia, and cortical blindness, supported by a stepwise breakdown of the entire pathway.