How many degrees is high astigmatism?

High astigmatism refers to astigmatism degree in more than 300 degrees, can be myopia, can also be hyperopia, or mixed astigmatism, this astigmatism most will cause several aspects of the impact on the eyes. 1, will cause a significant decline in vision, this decline in vision is not only far vision, and myopia will also decline, meaning that far, near are not clear, and easy to see fatigue. 2, high astigmatism is difficult to correct through glasses, or wearing contact lenses, even if astigmatism in the case of correction, it is difficult to make vision reach a better state. 3, astigmatism will cause eye fatigue state, so when looking at mobile phones and reading for a long time, it is easy to show eye discomfort, soreness, pain, photophobia, dizziness, headache are possible. Therefore, for high astigmatism, you can consider wearing orthokeratology or laser surgery.