Eye:
The organ of sight. Eyes are organs that detect light, and send electrical impulses along the optic nerve to the visual and other areas of the brain.
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Overview:
The eye is a very complex organ with multiple components. The eye allows you to see and interpret the shapes, colors, and dimensions of objects in the world by processing the light they reflect or emit and the eye is able to detect bright light or dim light, but it cannot sense an object when light is absent. We use our eyes in almost every activity we perform, whether reading, working, watching television, writing a letter, driving a car, and in countless other ways. Most of the people probably agree that sight is the sense they value more than all the rest.
Our eyes work much similar to a camera. In a camera, light passes through the lens and then focuses on the film. Each of our eyes also has a crystalline lens, which is located just behind the iris. As the image passes through the cornea, our lens focuses on those lights, colors and shapes on the retina. The retina then registers these images and sends them to our brain but sometimes the shape of our eye doesn't bend the light properly, and hence this can lead to common vision problems like nearsightedness and farsightedness. By contracting and relaxing the muscles that make up the ciliary body, the thin vascular tissue which secretes transparent liquid within the eye, we are able to focus our vision on things which are close up, far away and everywhere in between. This function allows us to see objects throughout our range of vision.
