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When all of the components of the eye function properly, light is converted to impulses and conveyed to the brain where an image is perceived. It accommodates to changing lighting conditions and focuses light rays originating from various distances from the eye. the retina), no matter how good the rest of the eye is you will not get a good picture. As with the camera, if the “film” is bad in the eye (i.e. The peripheral retina is responsible for the peripheral vision. Before he could flinch back, she nicked his left ear with her obsidian knife, and when he yelped in surprise, she licked welling blood from his skinand then handed him the knife and turned her back on him as she would. This is responsible for your sharp vision, your reading vision. He had never seen eyes of such green before, fathomless, as luminous as polished jade. The center 10% of the retina is called the macula.

The receptor cells (rods and cones) of the retina change the light rays into electrical impulses and send them through the optic nerve to the brain where an image is perceived. The retina is a membrane containing photoreceptor nerve cells that line the inside back wall of the eye. The very back of the eye is lined with a layer called the retina which is similar to the film in a camera. Next in line is the lens which acts like the lens in a camera, helping to focus light to the back of the eye. The iris and pupil act like the aperture of a camera. As the eye’s main focusing element, the cornea takes widely diverging rays of light and bends them through the pupil, the dark, round opening in the center of the colored iris. A human eye is like a camera with the cornea, which is like a lens cover. Each part plays a vital role in providing clear vision. The individual components of the eye work in a manner similar to a camera. These messages are then sent to the brain via the optic nerve, which runs from the eye to the brain. Black and white vision is seen by the rods and color vision is received by the cones.

Receptor cells called rods and cones make up the retina. The retina is very important as it is the inner lining of the eyeball.

The hole in the center of the iris is called the pupiland the coloured part of the eye is the iris. This lens-like structure focuses the light reaching it. A transparent window at the front of the eye is called the cornea.

The human eye is not a full sphere, rather it is a fused two-piece unit.

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