Optic nerve

The optic nerve is the nerve that transmits visual information from the retina to the brain.

Physiology

The optic nerve contains 1.2 million nerve fibers. This number is low compared to the roughly 130 million receptors in the retina, and implies that substantial pre-processing takes place in the retina before the signals are sent to the brain through the optic nerve.

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The blind spot of the eye is produced by the absence of retina where the optic nerve leaves the eye. This is because there are no photoreceptors in this area.

Related Topics:
Blind spot - Photoreceptor

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