For more than a century, scientists have understood that three factors control pupil size: light, focus distance, and ...

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Tennis Focus, Hot Topics Jack Draper is bidding for his third career title in Doha when he takes on Andrey Rublev in the final.

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Researchers have discovered a fundamental mechanism that affects the size of the pupil, namely our breathing. The study shows that the pupil is smallest during inhalation and largest during exhalation ...