<prompt> Lens used in Astigmatism:Convex lensCylindricalConcave lensContact lens  <response>: Ans. b CylindricalRef: A.K. Khurana 6th ed. 142-423 Astigmatism is a common eye condition thats easily corrected by eyeglasses, contact lenses, or surgery. It is caused by an eye that is not completely round. It is a type of refractive error. Cause: Astigmatism is a natural and commonly occurring cause of blurred or distorted vision. The exact cause in not known. Symptom: Blurring of vision which can be associated with fatigue and eyestrain.The cylindrical lens is used for the management of astigmatism.Also, Know Myopics are said to be short-sighted. Concave lenses are used in myopics A convex lens is used in hypermetropic. 