Basic vision requirements for pilot are 20/40, correctable to 20/20. There are other specifics which NAMI can answer. My first flight physical for the Navy, I was 20/20. By the time I hit P-cola, I was 20/25 and had to wear glasses when I flew. I had PRK two years ago as part of the eye study for pilots. Ended up with 20/12 each eye. Just so you know, the eye standards relax a bit more when you get winged. I think 20/100 or so, correctable to 20/20.