I just found a site called The Cambridge Institute for Better Vision (Google it). It has a wealth of information on all-natural self-improvement methods to correct mis-use of the eyes which result in vision impairment.

In addition, they have a subscription service. It's usually $20/month, but after I subscribed to their free newsletter, I was offered the chance to subscribe for $10/month. I intend to do that, as soon as I can clear a little space on my calender. It will be worth it to me to have all the information in one place for my own vision therapy efforts.

Good luck with your vision health explorations!