20/20. But you can have glasses
Try again. 14CFR Part 67 holds your answer.
If you intend to fly recreationally Dicho; correctable 20/40 near or distant is all that's required for what's called a third class medical certificate. This allows you to operate with private, recreational and student pilot certificates which themselves afford you the privileges of flying an airplane for not less than the pro-rata cost of the airplane and also not for hire. For hire simply meaning you're being compensated to operate the airplane which as a private, recreational or student pilot you are now allowed to do.
To fly with the privileges of a commercial pilot or airline transport pilot certificate you require a second or first class medical certificate which requires 20/20 distant vision (corrected to) and 20/40 near vision (again corrected)
LASIK and other such procedures are very much approved and for further details you can contact a local Aviation Medical Examiner (AME) which is usually best to get referrals from local pilots for their doctors or going here:
http://www.aviationmedicine.com/This used to be Virtual Flight Surgeons but they're a team of very pilot friendly doctors whose business it is to educate you on your medical issues.