Astigmatism correction in one eye. should i have slight magnification in other to balance it?

Astigmatism: Astigmatism simply means that with respect to the optics of the eye, instead of being completely spherical, in one axis or the other the opics are more football shaped, bending the light more in that axis. Glasses or some toric contact lenses can help correct vision that has astigmatism. Lasik or surface ablation/prk can surgically correct astigmatism. I'm not sure why you're asking about magfcn.