Maverick County Courthouse, Eagle Pass, Texas 188/254 âThe Rio Grande forms Maverick Countyâs western and international border with Mexico; the county is bordered on the north by Kinney County, on the east by Zavala County, and on the south by Webb County.
The function of the optic chiasma  is to relay electric signals as they pas â¦ s from the optic nerve to  the brain.
Each optic nerve contains approx. one million fibres carrying information from the rods and cones of the retina. The optic nerves progress from the posterior of the eyeball, into the skull, through the optic chiasma (also known as the optic commissure), then on to the cortex of the occipital lobe on each side of the brain. More about Ophthalmology: This section includes short definitions and descriptions of the parts of the eye.