MedicalTerminology DB

Meaning of optic chiasm: The place in the brain where some of the optic nerve fibers coming from one eye cross optic nerve fibers from the other eye.

Definition of optic chiasm

The place in the brain where some of the optic nerve fibers coming from one eye cross optic nerve fibers from the other eye. Also called optic chiasma.

Written and maintained by James Murray Last updated July 21, 2026 Educational reference, not medical advice. Read the limitations.

For learning, not diagnosis. This glossary provides general educational information and is not a substitute for advice from a qualified healthcare professional. If you may be experiencing a medical emergency, contact local emergency services.