The vision and perception of external reality owe much of their functionality to pupil.
To identify them, just look at the smallest part of the eye, the circle that hides in the iris and that changes its size every hour.
According to science, the pupils are able to become more or less large depending on the external lighting. The more light there is in the room, the smaller and more minute the pupil is; on the other hand, when the space is poorly lit, the pupil dilates.
Lately, a study dedicated to vision has shown that pupils also change size based on the number of objects that we observe.
16 different participants were shown two images containing a series of dots. In the first, the points were separated from each other, while in the second they were connected, creating the illusion that there were fewer objects.
From the results obtained, the pupil size decreases significantly when observing the second image.
The seam caused the number of perceived objects to decrease. The number of dots has not changed, but the way the eye observes and considers them has changed.
The size of the pupils has changed in relation to the number of objects in the scene. The eye voluntarily decided to reduce its concentration because there were fewer objects.
All this would seem to demonstrate the existence of a relationship between visual perception and numerical information.
In other words, our eye is inherently capable of capture the number of observable objects and start a "categorization". Scientists think that this ability is closely linked to the person's spirit of survival.
In order to survive, humans need to keep the situation under control and analyze all objects in their field of vision. As the number decreases, the pupil size also decreases.
A new skill for the pupils
According to neuroscientist Elisa Castaldi, head of the study, “This result shows that numerical information is intrinsically related to perception”.
Information that might seem "useless", but which proves incredibly useful for the medicine.
The doctor gave the example of dyscalculia (math learning dysfunction), stating that knowledge of this new pupil ability could help doctors identify difficulty even in very young children.
An important change, which must be considered with due attention. The world of science continues to take small steps forward that, over time, could change people's lives.
The ability to weigh numbers comes directly from childhood, if not from birth. When babies open their eyes for the first time, they are already able to tell how many objects are within their field of vision.
The pupils dilate and shrink accordingly, becoming smaller as the number of objectives decreases.
The perception of reality changes with time and with growth, but the special ability of the pupils to immediately register the number of people / things present in space does not change.
Previous research and insights
Before Dr. Elisa Castaldi's study, several others were conducted research on the pupils. Doctors have come to show that their size changes not only according to visible objects, but also according to:
- the size of the objects
- of the context in which the objects are immersed
- light conditions
- the presence of possible visual illusions involving brightness
A lot of researchers are trying to answer why the brain sends specific signals to the pupils based on external conditions. However, there is still a lot of research to be done and just as many things to discover.
Our eyes they seem to be more sensitive to the number of objects we are looking at more than how they are spaced or arranged, which is another reaction that can be analyzed in future studies.
In the coming years, it is likely that we will receive new information and new details on the subject. Until then, it is advisable to wait and continue to inform yourself, so as to always be prepared to welcome the future.