Science · 4 views
Scientists Reveal The Strange Neurological Reason Your Pupils Dilate When You're Surprised
(Nan Palmero/Flickr/CC BY 2.0) Your pupils quickly dilate when you enter a dark room, letting in more light to help you see.
Story Brief
(Nan Palmero/Flickr/CC BY 2.0) Your pupils quickly dilate when you enter a dark room, letting in more light to help you see. Once you're in brighter conditions, they contract accordingly. This reflex is well-known, but pupil dilation can also happen for other, less obvious reasons .
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