The hazards of high astigmatism include headache, eye soreness, visual fatigue, blurred vision and vision loss. 1. Headache and eye soreness: If high astigmatism is not corrected in time, headache and eye soreness will occur when the condition develops seriously. 2. Visual fatigue: it is more difficult to see things with astigmatic eyes compared with normal eyes, and if high astigmatism is not treated in time, the symptoms of visual fatigue such as soreness and dryness of the eyes will appear. High astigmatism, if left untreated, will cause symptoms of visual fatigue such as soreness and dryness of the eyes. 3. Blurred vision: Astigmatism refers to the difference in refractive power of the eyeballs in different diameters, which cannot focus on a point on the retina, and therefore does not cause blurred vision. High astigmatism can even lead to amblyopia. 4. Loss of vision: High astigmatism narrows the distance and near points, and if it is compound astigmatism or mixed astigmatism, there will be a significant loss of vision. If you have high astigmatism, it is recommended that you go to the hospital in time for treatment or therapy.