The focusing of our eyes is controlled by muscles. Unless the shape of our eye changes or the pressure within our eyes changes, then it is a change in the muscles that actually causes our sight to reduce. Doesn't that make sense? If they are muscles, then they can certainly be improved by conditioning, yes?

About 7 years ago, I heard about eye exercises improving vision. A friend of mine told me some exercises to try. I've experimented with it a little bit and I've had some decent short term results. I haven't kept with it consistently, but I was able to sharpen my focus for a few days or a week or so. I've mainly done this because my work over the past 12 years has mostly involved looking at computer screens. Computer screens can wreck your vision. I've used the exercises to maintain my eyesight rather than improve it.

Here's an example of one simple exercise...
1. Hold a card about 6-7 inches from your face, with the top of the card about nose level.
2. Just above the card, there should be a tree or some other object very far off in the distance with detail that you can focus on.
3. Look at the card for 5 seconds.
4. Then look at the tree for 5 seconds.
5. When looking at each object, try to focus your vision as intently as possible so that you are exercising the focusing muscles in your eye. Try to focus on every little detail of the card and the tree.
6. Keep repeating and soon you should drop the time that you look at each object. 4 seconds...then 3 seconds.
7. After a minute or so of this, then change the objective so you try to look at each object only as long as it takes to focus on it.
8. As soon as you gain focus of the object, then switch to the other object.
9. You want to do this as fast as possible, but don't cheat! Only change objects AFTER you have successfully focused on the details of the object to the best of your ability.

This will make your eyes really tired and possibly make them a little blurry after you are done. However, the next day or two, you will probably see improvement on how far off in the distance you can see, for example. I know I experienced improvements.