Correction of high astigmatism

Soft contact lenses can compensate  astigmatism in a fairly limited range, usually up to  -3 D. Of course ,there are  lenses ( which require a lot of work )that can be  adjusted  individually, even up to  -11 D cylindrical, but you can never achieve  better vision as with glasses . The reason for this is the need for  dynamic movement of the lens on the eye. During these movements, lens sways slightly, changing more or less, the axis of corrected astigmatism. Such drawbacks do not have  hard lenses. Manufactured currently hard contact lenses allow for correction of all defects of vision.

High astigmatism 

If astigmatism is higher  than 3 D, correction of the defect with glasses becomes difficult, and patients often do not achieve full vision. In such a situation, the ideal method is to use hard contact lenses, especially in children, where it allows for proper treatment of amblyopia.