Thursday, January 13, 2011

Seeing Things

Eyes are just a ball of liquid. So why are they so important? I don't know, why are you asking me? Okay, that was a joke. I do know. I'm just trying to be funny. I'm also starting to sound like the big red button on www.randomwritersrambling.blogspot .com Well, anyway, back to the eyeball. Imagine being unable to see anything. Wow. There isn't much to see, is there? If you couldn't see, you would be fairly helpless. And do you know what lets you see (drumroll please) your eyes! (As if I needed to say that.) The front of your eye is called the cornea and is transparent. The cornea lets in light. The colored part is called the iris, and at the center is the pupil, which narrows or widens, depending on the amount of light you need to see. Inside your eye is a small lens. When light enters your eye, which is probably happening right now, little muscles move the lens so you can see better. The lens focuses a picture on the back, or retina. The picture, by the way, is upside down. The retina changes the picture into nerve signals, which are sent into the brain via the optical nerve. The brain turns the picture right side up and voila! you are seeing something. This is happening all the time. I advise you not to think about it too much though. It will give you a headache.

Well, that's all for now on the eye. Adios!

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