Gravity has a more pronounced effect on brow position than it does eyelid position, according to a presentation at the virtual American Society of Ophthalmic Plastic and Reconstructive Surgery annual meeting.
“Spaceflight affects the eyelid and brow differently,” Justin Karlin, MD, MS, said. “While the brow elevates consistently, the eyelid may elevate, fall or stay the same height.”
Karlin and colleagues collected at least six front-facing portraits of 18 astronauts from the NASA image database and digitally measured the margin reflex and pupil-to-brow distances.
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