Not Astro here, but wearing glasses while flying fighters is common, and there is no problem pulling Gs in them. Pressure and friction from the helmet keeps them firmly in place.Just flew YVR-LHR-JNB (and back) and watched this movie two more times lol.
One question for Astro - Bob is wearing glasses in the movie. Is that normal and is there any fear of wearing them while pulling hard G's? He was wearing them for the shots in the real planes but I really have no idea if that is actually a normal thing?
As a WSO, uncorrected eyesight kept me out of pilot training. Corrected I was 20-15 in one eye and 20-12.5 in the other. I flew with pilots that could beat that without glasses, others I could outspot.