No eye surgery here and I haven't hung upside down (like on the monkey bars or climbing a tree) since, well, before I turned forty.
Negative g, especially the inverted flight demo, always made my eyes water but I just assumed that was the moisture pooled inside my mask and general face sweat (in spite of my earlier efforts to secure my mask in a +1g environment). I just kinda shoved the stick to put the pipper about 5-10° nose up to satisfy the "Q" standards for altitude gain/loss, here comes all that moisture running "up," note the clock, look at the oil pressure, and roll the ship right side up about ten seconds later. Then I'd blink a bunch of times until the blur went away.

Negative g, especially the inverted flight demo, always made my eyes water but I just assumed that was the moisture pooled inside my mask and general face sweat (in spite of my earlier efforts to secure my mask in a +1g environment). I just kinda shoved the stick to put the pipper about 5-10° nose up to satisfy the "Q" standards for altitude gain/loss, here comes all that moisture running "up," note the clock, look at the oil pressure, and roll the ship right side up about ten seconds later. Then I'd blink a bunch of times until the blur went away.
