Something I've been learning about the eyes is the very interesting fact that we don't conciously use the amazing abilities that our eyes have. Just like the brain subconcious that we're trying to tap into, we need to learn to control our eyes.
To get the perfect blip page and photofocus, you first need to be able to control the divergence and convergence of your eyes, so you can lock in a good blip. The second thing is harder, it's to let your eyes develop their focus independently. If your one eye can focus when the other is closed, then why can't they both focus when you diverge your gaze? They can! But it takes some practice. And then more practice. It is very possible though...