There are many suggestions on the forum and the EM website to replace the cylinder correction through half its value of spherical correction.
Can someone explain how that will change the corneal shape?
My logic is the following:
When there is astigmatism, the light gets refracted before the retina on the specific axis. This wrong refraction is due to a badly shaped cornea.
So for me the thing to do would be to ONLY reduce gradually cylinder correction, so that the cornea can reshape.
If one does replace CYL trough SPH, it would lead to the eyeball elongating in order to cope with the unnecessary correction that shifts the focus beyond the retina for its parts that are not on the previous astigmatic axis.
What do you think about it?