Is it true that corneal astigmatism is the same as irregular astigmatism?

Yes but: Astigmatism is often the result of changes in the spherical contour of your cornea. Regular astigmatism is normal and can be corrected with eye glasses or toric contact lenses for astigmatism. Irregular astigmatism if often caused by diseases of the cornea and cannot be corrected very easily. Irregular astigmatism, if present, needs to be checked out to determine the cause, .