Hey Nick, cheers for the reply. I've been at this vision improvement thing for a while now and I've made some significant improvements. My vision is now mainly double vision/ghost images as Todd Becker describes it. It feels like I'm on the home stretch and I think I need to up the intensity. I've done similar sounding exercises to the one you mention but I've never pushed it as hard as I could' because I thought it might be counterproductive. Having done the 30 minute session today I think I'm being too soft on my eyes, so I'll join you in on hour-long sessions.
What's the longest session you've done? Any tricks for keeping concentration that you've found?
mailliam,
I know Mr. Becker's site is all about careful application of stress in order to get stronger - as is obviously the case in things like being able to tolerate very cold temperatures and such. But I personally (keyword = personally) believe that when it comes to reversing myopia/improving vision, your eyes will be completely fine if you push them real hard like I do. When you started out reading tons of books and writing reports behind the computer screen (and maybe playing video games) in high school, all that close stress didn't damage your eyes right? Well besides the fact that you got myopia but myopia is more a condition than a permanent damage type of thing, you know, since you can reverse it!
Steven basically says the same thing, he advocates wearing the absolute strongest plus lenses you can find (6+) and go outside and focus on a distant object, but that didn't work well for me lol because I'm kind of allergic to glasses. If I HAD to wear the glasses to do this stuff I would just bite the bullet for a bit and go live with the headaches and stuff for a bit but I, and really anyone, don't need them since focusing intensely at a really distant blurry object will get you the same amount of far stress that you need to push the eyes back into shape.
So my advice to you is to do like I do - drop all your hobbies and pastime activities for just a little bit and spend all of your spare time focusing on a really blurry distant object, it doesn't even need to be a line on a Snellen chart, it can be anything, try to have variety since using the same thing all the time gets really boring - I will sometimes look out the window and focus on the number plate of a car parked way over in the next street, I will focus on the bedroom window of this girl I really like

ok that was so wrong but you get my point.
You can practice as long as you want as long as you stop when your eyes start hurting. CapitalPrince's dad would do the same thing, practice until his eyes started to hurt and he improved his vision REALLY quickly.
My sessions usually last no shorter than about 45 minutes and then I take a little break and then I go back, I spend whole days doing this now. And of course I keep my distance from screens and books as much as possible. The text you read has to be blurry - if whatever you are reading is sharp and clear, you're not sitting far enough away!
Longest session was probably today - 4 hours straight, interspersed with a few 5 minute breaks here and there. And....hehehe...if you read my posts on this forum you can see how I always go on about how incredibly fast my vision is improving, well I'm definitely not exaggerating when I say that this exercise is truly THE ultimate exercise to train your far focusing ability with, My gains have been so big and so fast it's not even funny. The results are semi-permanent to permanent. Every day I am focusing on further and further objects faster and with and less and less effort.