There are many online sites claiming improving your vision is possible (rebuild your vision). It is based on work done in the late 19th century by Dr. Bates. There are exercises and methods to stop vision from getting worse as well as improving vision clearity.

I have a friend who has used one of these mothods and claims that it worked great. I am still skeptical since this type of therapy is never prescribed by a doctor.

Bates had some ideas about how vision works that completely contradicts general knowledge on how the eye works. Can find no reason whatsoever to advice using his methods.

I saw a documentary on eye exercise, from what I saw a lot of the people had good results. it also mentioned how some pilots in WWI would put marks on the wall and then turn their back and then try to find the marks again. Supposedly helping them identify where they had shot enemy fighter planes.