On one of my early AFF jumps I wore large over-the-glasses goggles supplied by the school, and the damn things were no where near tight enough and started to flop around as soon as I got stable. One of the instructors noticed and had the same concern as me...the goggles might come off, followed by my glasses. She held my goggles in place right up until I pulled. The moment she got on the ground she gave me the standard "if you can hear me turn right" radio call, and as soon as I turned right her next call way "if you still have your glasses turn left". Luckily my goggles and glasses stayed in place on deployment. I would have found the ground without my glasses but only because of gravity and it would have been an ugly landing.
