Correction of high astigmatism
Astigmatism correction can be performed by surgical implantation of toric lens during cataract surgery or simultaneous performing corneal relaxation incision. It is also possible to apply preventive treatment and fit contact lenses, soft or hard.
Astigmatism – and soft contact lenses
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.
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.