Eye training has been known about for a long time.
Except for all of the eye "doctors" and all of the teachers and... like everyone.
In the movie "Remo Williams" Chun where's glasses, which Remo chides him about. But, if you read the books, Chun would never were glasses, and wonders why glasses even exist. Don't you people know about eye training?
A simple way to train is you get two items (such as pens) and you hold them away from you so one appears twice as big as the other. Then you focus on one, then shift your focus to the other (wait for your eyes/brain to settle) then shift back.
Yes there are many excercises in the Bates method as well. It is a good idea to try and improve our vision naturally.