One of the most famous, though not proven, methods for improving your eyesight is The Bates Method.
The author Aldous Huxley was a big proponent of the Bates Method.
You might look into that.
I got the book, read it but never really followed through and did all the exercises. It could be a lot of hooey and snake oil. But it is a classic.
I have been looking into this idea too but have not put a lot of energy into it. There are apps for the iPhone and NintendoDS that promise to improve your eyesight but I have not tried them so I cannot advise. I just know they exist.
There are also a number of new types of eye surgery, in addition to Lasik, by I am still incredibly reluctant to let even the most highly trained and experienced medical professional go at my eyes with a laser or a thin wire, or anything, when my only issue can be resolved with glasses, even if I don’t like them, find them inconvenient, would absolutely love to wake up seeing perfectly, like I did when I was younger and would love to stop having to deal with the utter and complete frustration of trying to find my glasses when I can’t see clearly because I can’t find my GD glasses!