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Optic nerve - Definition


Definition

The optic nerve connects the two eyeballs to the brain, specifically leading from the retina. The retina is the area of the eye that captures light, and the optic nerve is responsible for transmitting the information it records to the brain for sorting. Violent blows to the face or various diseases can cause lesions on the optic nerve, with the principal symptom usually being impaired vision in the eye innervated by the nerve. If the nerve is completely ruptured, as a result of trauma for example, the vision in the affected eye will suddenly disappear, a case we call ipsilateral blindness. With partial lesions, caused by nerve inflammation, neuritis, or damage to blood vessels supplying the optic nerve, loss of vision in the affected eye remains only partial.

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