Cylindrical lenses are required for astigmatic people, and are also measured in diopters. Astigmatism is a condition in which the optics of the eye cannot focus a point object sharply enough into a focused image on the retina. This usually happens due to an irregular curvature of the lens or cornea. It’s corrected by using cylindrical lens. If your prescription has nothing in this section, it means that you don’t have astigmatism, if you see a number, it means that a particular median has to be corrected. Similar to the spherical section, + denotes farsighted astigmatism, and – denotes shortsighted astigmatism.