This app has been demonstrated to successfully improve visual acuity in baseball players and performance in game. (Works on the brain, not the eyes.)
Original paper:00005-0)
^ Link formatting is weird, so just copy-paste (Edit: fixed thanks to PECOS-9)
(Works on the brain, not the eyes.)
I don't think I understand what distinction you're making here.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.