AstigmatismIf the front surface of the cornea or crystalline lens is irregular in shape- more like a football instead of a basketball- light rays will form two different focal points of light. An eye will either be farsighted or nearsighted with astigmatism. Astigmatism may cause blurred vision either far away , up close, or at all distances. High degrees of astigmatism are usually hereditary, and may even be present at birth. Mild astigmatism usually does not need to be corrected. Eyeglasses, contact lenses, or refractive surgery can correct moderate to high degrees of astigmatism.