Thank you for contributing so much to this resource (Endmyopia as a whole) used by so many.
The 2016 book Spaceman: An Astronaut’s Unlikely Journey to Unlock the Secrets of the Universe is a memoir by NASA astronaut Mike Massimino. In this book, Massimino claims that NASA rejected him for astronaut training and spaceflight because he was too myopic (he failed the vision exam). According to Massimino, he was so determined to become an astronaut that instead of giving up, he did what most would deem impossible: he worked with a doctor to improve his myopia. Massimino claims that after many months of arduous training, he re-took the NASA vision exam and passed (!) having sufficiently reduced his myopia.
Although the publisher does not offer the book for free online, Google Books hosts a copy with many pages missing: https://www.google.com/books/edition/Spaceman/vbNQCwAAQBAJ?hl=en&gbpv=1&printsec=frontcover. The vision improvement and testing is chronicled in chapter 8, “Yes or No”.
Based on some searching, no one in this community is aware of what I present here. I find this surprising, and I’m excited to think I can help by writing this post.
Although to my knowledge Massimino did not specifically practice EM, I cannot help but think that in terms of the community’s evidence and outreach one couldn’t ask for a better case study: Massimino is famous and well-respected even among astronauts, and his significant myopia reduction was documented by NASA, before-and-after.
I hope this is useful to you.
James Kirk Cropcho