I made an adjustment to the regimen.
I'm now doing 20 minutes of fixation cards. Also, I've changed the way I do the fixation cards. It's a little hard to explain but here goes.
I'm not focusing on the in-between between fixing with the right eye vs with the left. It is a very odd sensation, because that moment between changing eyes is done almost without me being aware of it. What I'm going to try and do is keep switching between the eyes slowly as possible, and train my ability to detect the switch, and just go slower and slower until I find the point at which both eyes are under my command.
It's so weird because the targets are red and green, and it switches between red and green without my awareness, even though I'm triggering it and willing for it to happen. Vision therapy can definitely be trippy, and sort of borderline philosophical (who's doing what? What is the I? What am I?) practice.
That's the card I'm working with. You see that dirt on the middle right bottom? That's oil from my fingers from having used this same card for around a year for about 15 minutes per day. That's about 92 hours of holding that sheet.
Hopefully as I get closer to that inbetween state, I can stay there, become sensitive that that new place, and keep enlargening the door so that I can eventually walk through.