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optic chiasm
optic chiasm The optic chiasm is the X-shaped place where the two optic nerves meet.
The optic chiasm is the X-shaped place where the two optic nerves meet. There, fibers from the inner half of each retina cross to the opposite side while fibers from the outer half stay on the same side, so each side of the brain receives visual information from the opposite visual field of both eyes.