High astigmatism refers to astigmatism of 300 degrees or more, either nearsightedness, farsightedness, or mixed astigmatism, which mostly affects the eyes in several ways.1. It can cause a significant decrease in vision, not only in distance vision, but also in near vision, meaning that it is not clear to see far and near, and it is easy to visual fatigue.2. Even if the astigmatism is corrected, it is difficult for the vision to reach a better state.3. Astigmatism can cause eye fatigue, so when looking at the phone and reading books for a long time, eye discomfort, soreness, pain, photophobia, dizziness and headache can easily occur. So treat high astigmatism, you can consider with corneal shaping lens or laser surgery treatment.