Contact Lense Astigmatism

contact lense
A contact lens (also known simply as a contact) is a corrective, cosmetic, or therapeutic lens usually placed on the cornea of the eye.

astigmatism
(optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point
A defect in the eye or in a lens caused by a deviation from spherical curvature, which results in distorted images, as light rays are prevented from meeting at a common focus
(ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people
(astigmatic) of or relating to a defect in the eye or in a lens caused by a deviation from spherical curvature which prevents light rays from meeting at a common focus and so results in distorted images