Is the optic nerve a organ?

The optic nerve is not an organ. It is a nerve, which is a bundle of nerve fibres. Nerves are part of the nervous system and carry messages from the brain to other parts of the body, and from the body to the brain. Organs, on the other hand, are structures with specific functions, made up of different types of cells and tissues. The optic nerve is not an organ because it does not have a specific function. It is simply a pathway for messages to travel between the brain and the eyes.