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PATIENTS

WHAT IS THE OPTIC NERVE?
by Dr. Cesar A. Perez, Jr.

It is the main nerve connecting the eye to the brain, roughly the same width as a regular pencil. It transmits signals coming from the retina towards the brain. It is made up of over a million microscopic nerve cells.

Ophthalmologists can examine the front part of the optic nerve, called the optic disc. Glaucoma patients usually manifest certain patterns of changes in the optic disc, thus the importance of regular eye examination. Changes in the structure and appearance of the optic disc usually coincide with functional and visual changes as well.