Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Chiasmal syndrome:

"

Optic disc pallor may be apparent with an ophthalmoscope if the result is longstanding. If the lesion does not affect the lateral uncrossed fibers, the pallor may take on a bow-tie configuration. This is due to loss of retinal ganglion cells nasal to the macula in the papillomacular bundle. Compressive lesions often cause headache and may compress the third ventricle leading to hydrocephalus. The most common tumors also cause pituitary gland malfunction.[citation needed]