Answer:
Optic Chiasma
Step-by-step explanation:
The optic chiasm is an X-shaped structure located in the middle cranial fossa or fore brain that is built by the crossing in the brain by optic nerves. It is where the nerve of the right and left eye meet.
It is surrounded by the Willis circle and gets its blood from vessels forming the circle. It gives a place for dessication of optic nerve fibres so that some half of the visual field is processed by the virtual cortex.