What Is the Main Cause of Astigmatism?: Astigmatism causes blurry vision resulting from an irregularity of the eye’s lens or cornea. These irregularities may stem from genes, injury or certain eye diseases.
Astigmatism An astigmatism is an irregular curvature of the cornea. Symptoms include blurred vision, eyestrain, eye fatigue, and headaches. Eyeglasses, contact lenses, or refractive surgery may be used to correct the blurred vision caused by astigmatism.