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However, in some cases it can cause troublesome vision distortion. Here are the most common signs and symptoms of astigmatism: 1  Blurring or distortion of images at all distances. 2  Headache. 3  Fatigue. 4  Squinting. 5  Eye discomfort or irritation. 6  Difficulty seeing at night.
Astigmatism caused by problems with the cornea is known as corneal astigmatism. The same problem can also sometimes be caused by an irregular-shaped lens that bends light unevenly in the eye. This is known as lenticular astigmatism.