Hi jansen, motivation definitely matters a lot. I had the same problem but it then I came across this exercise and every single day now my vision has been improving not semi-permanently - but permanently. Just got up from bed and my vision improvement from yesterday's sessions is still there, and so it was the day before and the day before. So motivation is a non-issue for me at this point.
Everybody seems to have different experiences when they try to focus on very distant objects. In my case, I concentrate on the smallest possible point of an object that I can. So let's say I'm looking at a letter on the Snellen chart, like F. First I focus on the entire letter for a few seconds, then I narrow that focus to a smaller part within that letter, then another smaller part within that smaller part, and I keep doing that until my concentration breaks. And when that happens I just do the same thing all over.
Don't worry if you can't seem to clear the blur. Actually when doing this exercise you might notice that at times you're actually generating extra blur. This is not a bad thing! Your eyes are hard at work during that moment and that effort also counts towards your vision improvement.. Just keep trying. What I've noticed is that you're still training your focusing ability and thus improving your vision even you can't seem to clear the blur on the object you're focusing on. You don't necessarily need to see the object clearly, that will come in time. I believe that extra blur is simply an illusion of the eyes or brain or mind or whatever, that's really the best way I can put it, it's just an illusion, don't worry about it. The blur is simply a by-product from intensely focusing and ten minutes to half an hour or so after the session you will notice that your vision and focusing ability has noticeably improved. Beyond the blur, beyond the illusion, you're actually bringing the object into focus.
During my first session just days ago, I was focusing on the smallest row of letters on the Snellen chart and I was unsuccessful in clearing the blur and even generated extra blur (as in every session, this is normal).
The second time LATER THAT SAME DAY I managed to, for a few seconds, see the entire row (20/5) clearly and was able to quickly read 3 letters from it. And ever since then, I get those clear flashes almost every other blink now and I can focus on that row more and more times, faster and with less effort.
I'm sorry that you've been stuck for two years now that really sucks

my advice is to find as much spare time in your days as you can, at least an hour, the more the better, and spend it ALL on focusing on a very distant blurry object. And don't worry too much about what you have to do during focusing, It's not an extremely mechanical process. I myself just let it go and see what happens. I focus on a smaller and smaller point. Or, as dr. Bates wrote about, I imagine the object I'm looking at clear in my mind and in time it appears clear through my eyes. Or, sometimes my mind wanders...it's all good!
I know I'm getting repetitive now but lol I have never been so excited in my life. This is THE exercise to improve your vision with. It's come to a point where I might have to record my vision gains every single day now instead of every Friday.
Sorry everyone that I make my posts so long, but I once I start typing I just can't stop. I'm really trying to convey my full experience, as detailed as possible so I end up writing so much...