Astigmatism Testing Let's determine whether eye sight is impaired as a result of irregular curvature of the cornea or lens with Astigmatism test Test one eye at a time. If you wear glasses or contact lenses wear them for the test Hold the screen about 40 cm or 15 inches away Look at the picture and see whether you see blurred or distorted lines or not. Close your Left Eye Look at the picture and see whether you see blurred or distorted lines or not? All lines look same Lines look blurred / distorted Poor Left Eye Good Left Eye Close your Right Eye Look at the picture and see whether you see blurred or distorted lines or not? All lines look same Lines look blurred / distorted Poor Right Eye Good Right Eye