When a patient has significant astigmatism, a single vision IOL will not give clear vision at any distance. Patients with astigmatism have corneas that are not round, but rather oblong like a football. Toric IOLs have a unique design that offsets the imbalance of the corneal astigmatism. In this way they can significantly improve distance (or near) vision in these patients who otherwise would need glasses after surgery. For more information click here.