Fascinating Macro Footage of the Pupil of an Eye Constricting and Dilating in Slow Motion

Gavin Free of the Slo Mo Guys decided to forego British societal norms and look partner Dan Gruchy right in the left eye. Free used a long lens to capture macro footage of Gruchy’s eye as the pupil constricted and dilated in slow motion with an extreme change of light.

British people are not known for great eye contact, but Gav steps up his game by looking deeply into Dan’s eyes…From about 2 millimeters away to find out how quickly a pupil constricts.