Astigmatism can cause of blurred or distorted vision.You can use eyeglasses or contact lenses to correct it, Or you can take refractive surgery to cure it. However, Peripheral vision problems means that people have abnormal wide-angle field of vision though they have good central vision. And peripheral vision problems can be caused by retinitis pigmentosa, concussions, neurological damage as well as glaucoma etc. And i never heard that astigmatism can cause peripheral vision problems. And till ow, i didn't found how to cure it. But i heard that prism lenses can help to correct peripheral vision problems.