T1-weighted coronal MRIs. Note the diffuse enlargement of both optic nerves, the optic chiasm and both optic tracts. One can easily appreciate the infiltration of these structures, especially when ...

Why Diseases of the Optic Chiasm May Be Hard to Detect When a disease or lesion affects the optic nerve before it reaches the optic chiasm in the brain, the defect in the vision will show up in ...

With an MRI, the ophthalmologist will be able to see the size of the optic nerve and view the optic chiasm. The optic chiasm is the place within the brain where some of the nerves from each eye cross.

Dil was injected into the left retina, and RGC axons were traced to the optic chiasm. In the wild-type animal, a subset of RGC axons is repelled at the midline and to the binocular pathway (top ...

Note the large mass in the region of the sella which is growing up into and displacing the optic chiasm. The chiasm is draped and thinned over the mass. Surgical resection demonstrated a large ...

MRI is typically better than computed tomography for imaging the soft tissue around the sella and the optic chiasm. Pituitary adenomas account for approximately 10% of all intracranial neoplasms.

Chemotherapy for optic nerve glioma has a high success rate, with over 70% of people seeing no tumor growth after treatment. However, doctors are unable to recommend chemotherapy to children with NF1.

Pituitary tumors affect the optic nerves primarily through physical compression. As the tumor grows, it may compress the optic chiasm, a critical structure directly above the pituitary gland.

This is consistent with a diagnosis of BOA (or bowtie optic atrophy) of the left eye and correlates with a right-optic tract lesion. Source: Christopher J. Borgman, OD, FAAO ...