Central Nervous System
The "central command system" of the body, it includes the brain, spine and retina.
The central nervous system (CNS) is the "central command system" of the body, and includes the brain, spine and retina. Every nerve outside of the blood-brain and blood-retina barriers is considered part of the peripheral nervous system. Since the retina is part of the CNS, it is possible that treatments for other neurodegenerative diseases of the CNS (like Lou Gehrig's disease or Alzheimer's disease) could work for retinal degenerative diseases.