Two years ago I only recently started having single vision some of the time. Back then I was able to execute the AR up to level 4 (of a total of 12) both with the exo and eso settings.
Right now I am able to execute the AR successfully up to level 7 using either the exo or eso aperture. Not too shabby! Certainly when considering my Vision Therapist said that even people with 'normal vision' often have trouble going beyond level 9 or 10.
Good. This is where binocular vision problems come to die a slow and painful death.