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health advisory Hospital Alternative Medicine 2007-11-16 3:12:32

Answer:

In optics, astigmatism is when an optical system has different foci for rays that propagate in two perpendicular planes. If an optical system with astigmatism is used to form an image of a cross, the vertical and horizontal lines will be in sharp focus at two different distances

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Astigmatism occurs when the front surface of your eye (cornea) or the lens, inside your eye, has a slightly different surface curvature in one direction from the other. Instead of being even and smooth in all directions, the surface may have some areas that are flatter or steeper. When the cornea has a distorted shape, you have corneal astigmatism. When the lens is distorted, you have lenticular astigmatism. Either type of astigmatism can cause blurred vision.

Astigmatism blurs your vision at all distances. Astigmatism is often present at birth and may occur in combination with nearsightedness or farsightedness. The condition tends to remain constant, neither improving nor deteriorating much over time.

Astigmatism is common and affects most people to some degree. Often it's not pronounced enough to require corrective action. But when it is, treatments include corrective lenses and surgery.

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Astigmatism is an affliction of the eye, where vision is blurred by an irregularly shaped cornea. Its a problem if you want to wear contacts. Most people refer it to your cornea is shaped like a football. Here is a web page that explains it in detail.

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in connection with your eyes it means this: