To give my honest opinion, what JAA state as the reason for the limit is BS, as it has absolutely no effect on people wearing contact lenses. I have in my years of finding a reason for the limit also heard a lot of crap, even from JAAs doctors and it is not what is stated in the quoute in LastMinute's link.
"There is no myopia limit for revalidation/renewal."
Let me make an example... a person at the age of 20 get a Class 1 with -6 and when he turns 25 it has increased to -8... but he is still allowed to fly...?
Then why is a new guy with -8 not allowed? They have the exactly same vision, but just because you are a new guy you are not allowed to fly a commercial airliner.
...and no! Your vision don't get better because of more experience!
