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What is the optic nerve and what does it do?

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The optic nerve is located in the back of the eye. It is also called the second cranial nerve or cranial nerve II. It is the second of several pairs of cranial nerves. The job of the optic nerve is to transfer visual information from the retina to the vision centers of the brain via electrical impulses. read more

The optic nerve is composed of retinal ganglion cell axons and glial cells. Each human optic nerve contains between 770,000 and 1.7 million nerve fibers, which are axons of the retinal ganglion cells of one retina. read more

Due to its unique anatomical relation to the brain, the optic nerve is surrounded by cranial meninges (not by epi-, peri- and endoneurium like most other nerves). By TeachMeSeries Ltd (2018) Fig 1 – Overview of the anatomical course of the optic nerve. read more

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