If you have blurred vision or it is good but has headaches, rolling eyes or other discomfort, you may suffer from astigmatism.
Astigmatism is a condition that prevents the eye to form a clear image on the retina. This is usually due to an irregularly shaped cornea (the clear outer layer that covers the front of the eye). Sometimes, astigmatism is due to scarring of the cornea or abnormalities in the shape of the lens (the lens fine focusing inside the eye). This condition can be corrected with glasses or contact lenses. Most people have astigmatism to some degree, but in many cases are so slight that it should be corrected.