Basic Background on the Optic Nerve and its Potential for Regeneration (thanks to Wikipedia)
According to a Wikipedia article about the optic nerve, the optic nerve is the second of twelve paired cranial nerves but is considered to be part of the central nervous system as it is derived from an outpouching of the diencephalon during embryonic development. Consequently, the fibers are covered with myelin produced by oligodendrocytes rather than the Schwann cells of the peripheral nervous system.