how does laser eye surgery improve vision

is there any hope for my dream?

I graduate from college the end of this year in aerospace engineering and ever since i was little i have always wanted to be an astronaut! i was reading how to become an astronaut but i have a problem, i dont have great vision. i have a lot of trouble from seeing from far away. I was reading that even if i get surgery i still cant go to space because the difference of the atmosphere will make me go blind. One of the main reasons why people dont make the space program is because of the physical. It is my ultimate dream to go to space. Does anyone know any formation on how to improve my eyes like special laser surgery or something, something that nasa will accept, if you can can you provide a link? Thank you.
i am 21 since some surgeries you have to be a certain age

I think you should look into a type of laser surgery called PRK. It’s very similar to lasik, but it doesn’t create a “flap” like they do with lasik, and I believe there wouldn’t be pressure problems like with lasik. I also saw that NASA has approved lasik using the intralase laser to make the flap, rather than a blade. Anyway, your dream is definitely not over!