Sight Without Glasses by Dr. Harold M. Peppard: Books - Amazon.ca A very interesting read from the era when it was accepted that everything in the body is in some sense connected to everything else, rather than the body being a sort of living Mecanno set whose pieces we can meddle with irrespective of all the others.
It seems there were other such practitioners as well: BOOKS - WEBSITES - Best Bates Method Natural Eyesight Improvement Training - Bates History
Screen time hurts old eyes probably even more than younger ones? Too much screen time linked to an epidemic of myopia among young people