I am not an opth.. anything but have a few questions for you. Firstly, were you tested by an optometrist or ophthalmologist? Secondly, do you have dark brown irises? I know these are strange questions but had a nephew who is now in the RAAF go through something similar to you. The cyclopentolate or other dilating drug can have a longer time requirement to work properly with dark pupils and can consequently give false positives (negatives) so to speak. Second opinion for your career may be worth it...