"What is a stigmatism?" is a question that optometrists hear every day, but actually it's spelled "astigmatism." Astigmatism is the most common vision problem, but most people don't know what it is.

It may accompany nearsightedness or farsightedness. Usually it is caused by an irregularly shaped cornea (called corneal astigmatism). But sometimes it is the result of an irregularly shaped lens, which is located behind the cornea; this is called lenticular astigmatism. Either kind of astigmatism can usually be corrected with eyeglasses, contact lenses or refractive surgery.

Astigmatism Symptoms and Signs
If you have only a small amount of astigmatism, you may not notice it or have just slightly blurred vision. But sometimes uncorrected astigmatism can give you headaches or eyestrain and distort or blur your vision at all distances.

It's not only adults who can be astigmatic. Dr. Karla Zadnik, an optometrist at Ohio State University School of Optometry, found in a recent study of 2,523 children that more than 28 percent of them had astigmatism. Children may be even more unaware of the condition than adults, and they are unlikely to complain of the blurred or distorted vision. Unfortunately, astigmatism can affect their ability to see well in school and during sports, so it's important to have their eyes examined at regular intervals in order to detect any astigmatism early on.