Do a lot of investigation and listen to your personal GP and the reputable (Lasik,Bochman etc) eye doctors. If they say anything but positive at the current time... wait. And... when you do go ahead (if you do) make sure that you are getting the type of procedure that is acceptable for flight crews if that is what you are going for. Also Med Techs that we spoke to said that they get a lot that have it done and the results do not change the medical status of the file. Also a cost of about $5,000   ..... Bochner does dove a student/military discount of 15% I think it was.
Younger Son was advised that his eyesight was not not good enough for his selected trades and asked if he wanted to select others that were. He really wanted the selected trades and his older brother is at RMC and would not change his decision for the world.
Younger son wanted to take a look at Laser surgery and we spoke with a number of Doctors and did a lot of web based research to say the least. He was 18 at the time, and a few doctors showed little concern and comment........ walk away from these. Spoke with Bochman, who have been around a long time and the Doctors there literally wrote the text books for such surgery. The first question was "what change has there been in his eyes over the past 3 years?" and " we need copies of his eye exam results from the last three years before we can even make any comment". His eyesight has been very stable with very little change, which they said was unusual for someone of his age. They stated that they could therefore do the surgery only if his eyes checked out and corneal thickness etc was good.... And that they could not guarantee 20/20 vision but were able to supply statistics as to percentage that were and others.  Also stated that as we all should know eyesight changes as we get older and that would still happen etc....
Took down the past three years results, had him checked out and the surgery was done. He was a real trooper (no pun intended) and pleased to state that he does indeed have 20/20 vision and has been changed to V1 and merit listed March 15th. He is a strong candidate or we would not have had him get.......... it is his dream and I guess he will find out in the next couple of weeks if he is accepted. If not ..... either Queens, McMaster or Carleton for CIvil Engineering.
So in summary... do your homework and listen to the Doctors and take their advice. DONT EVEN DISCUSS FURTHER WITH THOSE THAT DO NOT ASK A LOT OF QUESTIONS WITH YOUR AGE. Son was fortunate that stable and thick corneas etc. If they recommend not to do for a few more years or until stable listen to them. Most will not even do the surgery when this is the case... there is a a reason that this is their stance.
Good luck in your application.