It is a cranial nerve.
It is a bundle of neurons, all flowing from the same general source (the eye) to the optic chiasm.
it carries visual information from the eye to the brain
An optic nerve can do many things, but in general it basically conrtols the signals to and from the brain from the eyes.
The optic nerve is in the eye (optical, Optical illusions)
Glaucoma Risk Factors
Glaucoma Treatments
Understanding Glaucoma
Glaucoma Symptoms