As far as med stuff goes, get advice from the med staff at recruiting. Regardless, as mentioned it is fraudulent to fail to disclose. More to the point if it means you are unsuitable now then there are many ways in which to get stuff fixed and have another go. I know of plenty of guys with niggling injuries that have, at times, seriously affected their performance. How do you come clean with that one in the middle of pilots' course! I know one guy got caught during pilot training recently - and how much do you think that held them up?! Not only did the issue need to be resolved, but there is also an investigation into why it wasn’t disclosed originally...sucks to be him!
Hey Spaceman, why so dark about quality of trainees? You seem to know what you are talking about, so you would also be aware that the syllabus and number of QFIs that a trainee flies with means it has to be some serious conspiracy to get someone through under the required standard!