Grand Central Terminal (GCT; also referred to as Grand Central Station or simply as Grand Central) is a commuter, rapid transit (and former intercity) railroad terminal at 42nd Street and Park Avenue in Midtown Manhattan in New York City, United States.
One of the most important structures in your eye is the cornea. The cornea is a thin, clear membrane that covers the outer part of the front of the eyeball. It's made primarily of a protein called collagen, which is very tough and strong. Because it's so tough and strong, it protects the delicate structures inside the eye from damage. In addition to protecting the eye, the cornea has another very important function for your vision. When you look at something, light goes into your eye and the cornea is the first thing it passes through. Since the cornea is a curved surface, it acts like a lens and begins to focus the light.
Because the cornea is as smooth and clear as glass but is strong and durable, it helps the eye in two. ways: 1. It helps to shield the rest of the eye from germs, dust, and other harmful matter. The cornea. shares this protective task with the eyelids, the eye socket, tears, and the sclera, or white part of the.