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A bizarre video of eyeballs illustrates our pupils shrink with age

Smaller pupil size makes it harder to see

mosaic of eyeballs

Tracking study participants' eyes, specifically their pupil size hints at how age changes our sight.

R. Lazar et al/Royal Society Open Science 2024

By Abdullahi Tsanni

Time takes its toll on the eyes.

Now a funky, Hitchcockian video of 64 eyeballs, all rolling and blinking in different directions, is providing a novel visual of one way in which eyes age.

A video display of 64 eyeballs, captured using eye trackers, helped researchers compare the size of younger and older study participants’ pupils under differing light conditions, confirming aging affects our eyes.