Wednesday, February 10, 2016

Messing with prisms again

I'd been thinking of ways I can load the Brock String. I busted out some of the old prisms I had bought around four years ago.  I did some exercise with the base in.  This forces my turning in eye to move a bit exo in order to superimpose the double images.  So it's making the muscles go a bit further than normal.  I did that for a few minutes yesterday and then I went back to the normal Brock String exercise thinking that it probably wasn't doing anything.

Suddenly today when I was doing the Brock String I noticed that the closest beads were really close to me, noticeably more than normal.  The thought occurred 'is that because of that one minute I did the other day with the prisms? nahh...'  But then I thought about it a bit more and realized that's probably what it was.  And then I did the rest of the exercise with the prism.

When I finished the Brock String and went back to Windlands in VR, I was sort of surprised by how things looked.  Things had improved quite a lot.   The game had jarred me a bit.  Running around and grapping onto things really gave me a sense of motion.  Things were different from yesterday, noticeably.  That's one of the things that people tell me when I show them my Oculus Rift with a demo like a rollercoaster.  They often mention how amazing the sense of movement is--it really almost feels like they're being thrown around.  Well, I'm starting to get a sense of that.

I guess there are different ways that prisms can be used.  There's sensory fusion, and then there's motor fusion, right?  It seems the typical use is sensory fusion, allowing superimpositioning, and thus, allowing the brain to rebuild on the binocular depth neurons.  And then the eyes align themselves in order to give the brain the information it's being trained to want.

I'm using the prisms the other way.  I'm actually making it harder to superimpose.  I'm making it so that my muscles have to stretch more than usual (exo) in order to superimpose.  I think of this a little bit like taking a bendy material and bending it more than you where you want it to settle, because when you let go, it's going to bend back a little.  I don't want exotropia.  But practicing exotropia might make it more easy for my muscles to maintain a straight gaze since they're so accustomed to esotropia.  Maybe it's necessary to sort of trick my muscles in this way because my muscles were screwed up with the surgeries I'd had when I was a child, who knows.  I'm curious to see what happens later this week.