optic chiasma
noun
a site at the base of the forebrain where the inner half of the fibers of the left and right optic nerves cross to the opposite side of the brain.
optic chiasm
-
a variation of
optic chiasma.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Hazel has an optic chiasm pilocytic astrocytoma - a slow-growing tumour which presses on her optic nerve and affects her vision.
From BBC ● Jan. 19, 2026
The pituitary, seated in the sella turcica of the sphenoid bone, is directly inferior to the optic chiasm.
From Textbooks ● Jun. 19, 2013
A growth of the pituitary gland presses against the optic chiasm and interferes with signal transmission.
From Textbooks ● Jun. 19, 2013
For example, the axons from the medial retina of the left eye cross over to the right side of the brain at the optic chiasm.
From Textbooks ● Jun. 19, 2013
The right medial retina then projects across the midline through the optic chiasm.
From Textbooks ● Jun. 19, 2013
