Ophthalmologists Told About The New Features Of The Human Eye

Ophthalmologists Told About The New Features Of The Human Eye.
Simply imagining scenes such as a cloudless date or a night sky can cause your pupils to mutation size, a new study finds. Pupils automatically dilate (get bigger) or catch (get smaller) in response to the amount of light entering the eye. This study shows that visualizing overcast or bright scenes affects people's pupils as if they were actually seeing the images.

In one experiment, participants looked at a partition with triangles of different levels of brightness. When later asked to for granted those triangles, the participants' pupils varied in size according to each triangle's brightness. When they imagined brighter triangles, their pupils were smaller, and when they imagined darker triangles, their pupils were larger.