Wouldn't it be stressful to drive through life with a warped windshield? Thats exactly how astigmatism feels. Astigmatism is an eye disorder which occurs due to the irregular curvature of the eye. It prevents light from being focused on the retina properly and blurs your vision. Astigmatism has different extents of affecting people. Medical research shows that astigmatism can be congenital or occur after an eye injury, disease or surgery.