The city is also served by Oklahoma State Highway 6, which connects Elk City with Altus to the south, and Oklahoma State Highway 34, connecting Elk City with Woodward to the north. The Elk City Regional Business Airport is located in the northeast part of the city, 1.5 miles (2.4 km) from the Interstate.
The optic disc is shaped like a doughnut with a pink neuroretinal rim and a central white depression called the physiologic cup.Check out the color of the neuroretinal rim, which carries the axons of the retinal ganglion cells. It should be orange-pink. If its axons die, the rim will turn white.he optic disc is shaped like a doughnut with a pink neuroretinal rim and a central white depression called the physiologic cup.
What comprises the optic nerve? It is made up of about 1 million small individual thread-like nerve fibers that come from the retina. The fibers bend about 90 degrees as they leave the retina and enter the front of the optic nerve (known as the optic nerve head). Normally, there is a small crater-like depression seen at the front of the optic nerve head. This depression is known as the cup. Its diameter is smaller than the diameter of the optic nerve. In the old days, when a doctor looked at the nerve with a monocular magnification device, the nerve head looked like a cup on a saucer (or disc). This started a whole group of optic nerve descriptors (cup to disc ratio, cupping, cupped, etc.).