I’m just going to copy this from Tom’s old blog, because I can’t be bothered writing a new review. So here we go.

It’s like this: Your science teacher always told you that it’s your lens that determines how good your eyesight is. If your myopic, it means your eyeball is too long and your lens cannot accomodate, and as a result, you get blurred vision. This is in fact very very wrong. A very clever doctor called W.H Bates discovered plenty of examples that do not fit in line with the orthodox teaching of bad eyesight. This concludes that the rule must be wrong, because if it was true, there can’t be exceptions, but there were, and orthodox ophthalmologists chose to just ignore those exceptions.
However, this was not satisfactory for him, and he investigated this, and discovered that the reason for poor eyesight is because of mental strain. The external muscles of your eyes then cannot change the elongation of the eyeball to accomodate, as they should in normal-sighted people. It is through the external muscles’ actions on the shape of the eye, NOT the actions of the lens, that determine your ability to focus.
Your eyes shouldn’t be trying to see, they just should. As he says, your senses can not act themselves, they are to be acted upon. As soon as your eyes make an effort to see, your eyesight begins to deteriorate. Any eyestrain, therefore, is a result of mental strain.
He cites the example of a young girl who had a keen interest in astronomy. She could see the moons of Jupiter with her unaided eye, yet ask her to look at some maths sums on a blackboard just a few metres away, and she became myopic. This is because maths was disagreeble to her. This caused mental strain for her, which in turn caused eye strain and hence reduced vision.
His book, Better Eyesight without Glasses, is rather heavy-going at first; it’s a lot to get your head around. But once you can familiarise yourself with the principles of treatment, it is actually very effective. Now, first and foremost, ditch the specs. They only make your eyes weeker, and create even more strain for your eyes (please read his book for an explanation of why).
Palming
This is the easiest ‘exercise’, once you stop trying! Close your eyes, place the palms of your hands over your eyes, without actually putting any pressure onto your eyes, and think nice things. Just like thinking of disagreeable things reduces your vision, thinking of nice things improves it. Now just lie or sit there, make sure you’re comfortable and relaxed, eyes covered, thinking of nice things, for as long as you wish. Now when you open your eyes, hey presto! you can see the numbers on the clock for the first time without glasses! Great, eh? Like I said, this takes a bit of practice, don’t give up, just make sure you aren’t making any sort of an effort, even unconsciously. The point of this is to relax your mind and body, therefore reducing the strain on your eyes. The longer and more often you do this, the longer the effects will last, till eventually you can get permanent relief. Those whose eye-sight is perfect will be able to see a field so black, that you cannot imagine anything blacker.
[End of plagiarised review]
I have to say, the exercises are a bit tedious at first, but I’m glad I stuck with them. I’ve been glasses-free for over 3 years now, and though my sight will not become normal without the aid of a Bates teacher (as I wore glasses for so long, the bad habits of my eyes will be so much harder to break), it has certainly improved my vision, so much so that after palming, my bad eye’s vision is equivalent to the vision in my good eye - and of course, my good eye gets even better too. My verdict: it’s certainly worth trying. If you’ve worn specs for a long time, then you will not be able to cure your eyes without the help of a teacher, but if you have never worn glasses, give it a go, you will find it surprisingly successful.