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.
Information from the. retina leaves the eye through the optic nerve, which. leads to the optical chiasm. Here, the ï¬bers from the. nasal side of the fovea in each eye cross over to the. opposite side of the brain while the others remain on. the same side.