Not purely from qigong, but I believe qigong helped me get much better results from laser surgery than if I didn’t do it. Basically my eyesight was so bad (-11.25) that after surgery I would still have a prescription of around -2 and still need glasses, but after surgery my eyesight was perfect or as close to perfect as can be. The eye surgeon couldn’t explain how or why.
These posts here go into more detail and with screenshots of the eye tests etc:
Now I don’t believe I could have gone from -11.25 to 0 purely with qigong, but maybe improve it by 2. Usually after doing qigong my vision is much clearer and sharper.