Horizontal double vision

I have -2.00 corneal astigmatism(10° & 170° axis) not lens-induced on both eyes and a subtle 0.25 diopter difference. I observed I can relax my eyes into double vision with my sph-reduced differentials. That’s the reason I just increased my DPI to 140%. I see my reading speed decreasea a lot while trying to see one of the both images floating around. I use the cursor and select to highlight text so I can focus on the half image’s text.
Guess I have to learn slowly again how to read while getting all the stimulus.