Pituitary tumors

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Pituitary gland and vision loss

Illustration showing pituitary gland and optic nerve

The two optic nerves — bundles of nerve fibers that serve as communication cables between your eyes and your brain — cross right above the pituitary gland, forming what's called the optic chiasm. A pituitary tumor typically will displace the optic nerves where they cross at the chiasm, leading to loss of peripheral vision in both eyes.

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