| The tumour partially encased the carotids, and compressed the optic chiasm. |
| Further studies show that EphB1 expressed restrictedly in ventrotemporal RGCs and epherin-B2 located specifically in the chiasm midline. |
| The optic nerve extending from the posterior aspect of the eye to the optic chiasm is really not a nerve at all. |
| In addition to the effects of excess GH, a pituitary tumour itself can cause severe headaches, and pressure of the tumour on the optic chiasm can cause visual defects. |
| Optic neuritis is bilateral and severe or associated with a swollen optic nerve or chiasm lesion or an altitudinal scotoma. |
| At the optic chiasm the optic nerve fibres from the nasal halves of the right and left retinas cross to the opposite side. |
