astigmatism is asymmetric prismatic effect right? so your glasses are opposite prisms to reverse it - as in, it alters what looks like the horizon to be higher or lower?
i worked at a health center at one time and i remember many times hearing while in the optics lab where i was assigned to do cleaning glasses ready for the customer, about "prisms" and astigmatism, i think was the reason for it
i don't know, i think yes, because ultimately the optic center of the brain can recalibrate "horizon" which is a composite of visual and proprioception and ear canal sensing stuff
i don't know what the proper way to perform this training might be, but maybe part of it is putting a plano on either side of your eyes first, so get two relatively cheap training glasses for this, and wear them when doing activities where balance and perception of up/down/left/right are important... probably simple stuff like bouncing balls off walls and suchlike
my own vision problems that i only recently developed are further short range focus and double vision, caused by the kidney damage and some secondary thing involving my opto-motor-nerves
fixing this problem i have refused to take the shortcut and use magnifiers, firstly, and these do reduce the double vision poor convergence, but the real cause of it all is really the main thing
so, idk, my feeling is that your brain just hasn't properly adjusted to the mismatch between the eyes, the prismatic distortion and your ear/proprioception, so, yeah
that's my suggestion anyway
please do tell me if i have surmised something that alternative eye health people have been saying for a long time, i just never have had much to do with anyone closely who has issues with astigmatism, or vision probems especially
having had my own recently due to this kidney problem has changed everything though, i hope this gives you some breadcrumbs towards how to heal your vision at least to some extent
nerves have a lot to do with it, as does the brain... but optometrists have one hammer and they use it on everything