Zebrafish optic chiasm

Fluorescence microscope image of a normal two day zebrafish embryo which has been stained to show the optic nerve axons from the two eyes at the optic chiasm where they cross the midline of the brain to form the optic tracts. Here, the stain shows the distribution of the Noi protein which is involved in eye and optic nerve development. Credit: J. Scholes and S. Wilson