Low astigmatism can be converted to myopia and fitted with contact lenses. Higher degrees of astigmatism, such as over 100 degrees, can be customized for contact lens wear. If the astigmatism is too high, such as 400-500 degrees, the glasses may not be able to be made, and there is no way to wear contact lenses in this case. If the astigmatism is less than 100 degrees, it is usually converted into myopia by half, for example, if there is 100 degrees of astigmatism and 100 degrees of myopia, the conversion of 50 degrees into myopia is 150 degrees of myopia. However, when you wear contact lenses, you need to subtract 25 degrees from your myopia, so you can subtract 25 degrees from 150 degrees, which is 125 degrees of glasses. So astigmatism also depends on the situation, because after high astigmatism discounted with glasses still can not see well, easy to have double vision. Only low astigmatism can be discounted, and high astigmatism is recommended for patients with custom-made glasses.