NVG's....nothing is automatic. I did not see anything that even addresses NVGs. There are not any "rating codes" associated with things you did, only medical/physical disabilities you have. IF you have something wrong with your neck, back, eyes then they will evaluate the conditions. As far as the question if it is "service related" then maybe that is when an NVG case could be made but ......I am not lawyer just an average guy retiring thru the process (with a lot of NVG time, but no eye, back or neck issues...yet).

Start early, be patient and good luck.