Astigmatism is one of the most common vision conditions; most people have some form of astigmatism. Astigmatism can be caused by an irregular shaped cornea or curvature of the lens, and can lead to blurred vision.

Minor astigmatism may not affect your vision or require treatment. However, many cases lead to blurred or distorted vision, which can result in pain and headaches. Typically, astigmatism is present with nearsightedness and farsightedness. These conditions are described as refractive errors.