It was previously believed that our pupil size was only affected by three things: light, focusing on nearby objects and cognitive effects.

The difference in pupil size between inhalation and exhalation was large enough to theoretically affect vision. The study also showed that the function is intact in people born without the ...

The difference in pupil size between inhalation and exhalation was large enough to theoretically affect vision. The study also showed that the function is intact in people born without the ...

Researchers have uncovered a key mechanism linking breathing to pupil size. Published in The Journal of Physiology, the study reveals that the pupil contracts during inhalation and dilates during ...