when you shine a light into one pupil the normal reaction of the other pupil should be to do what
If there is nothing wrong with a person, when you shine a light in one eye the other pupil will constrict. It's called the consensual response. When the pupil constricts in the eye that you shine the light into, it is called the direct response. pixilated_elf Â· 5 years ago. Thumbs up.