Astigmatism affects how you see by causing the light entering the eye to focus unevenly on the retina. This can cause objects to appear blurry or distorted, especially at a distance. The degree of astigmatism can vary from mild to severe, and the symptoms may depend on the type and severity of the astigmatism. In some cases, astigmatism may be accompanied by other refractive errors, such as nearsightedness or farsightedness, which can further affect vision. Astigmatism can be corrected with glasses, contact lenses, or refractive surgery, depending on the severity and type of astigmatism.