Eye connector

That which connects the eye to the brain. The Magic Pivot (灵枢 líng shū dà huò lùn) states, ... evils strike the nape and, encountering vacuity of the body, they enter deeply, following the eye connector into the brain. When they enter the brain, the brain spins. When the brain spins, it causes tension in the eye connector. When the eye connector is tense, the [vision of the] eye becomes dizzy and spins. Biomedical correspondence: optic nerve and surrounding structure.