| 1 | The pupils of your eyes dilate when you enter a dark room. | |
| 2 | It reduces the size of your pupils and the possibility of red-eye. | |
| 3 | Zuckerman et al. found pupil dilation to be a fairly good indicator of deception. | |
| 4 | And each pupil sends incoming visual info to a different side of the fish's retina. | |
| 5 | They move their head in that quirky way, and then this pupil follows you around. |