Sigh, My advice to you would be to pursue the pilot application till the end before entering as oberver if thats not what you really want to do.
As for laser eye surgery I had it done after I failed assesment day medical. Has to be stable for 6 months before your file will even go to PSA. Make sure you triple check the type of procedure you are getting as not all of them are allowed. In my day LASEK was not allowed, don't know the current state of play.