You have probably heard the saying that the eyes are the windows to the soul, but new research shows they are also connected to how we breathe. Scientists at the Karolinska Institute in Sweden and the ...

Scientists have long studied the size of our pupils to understand attention, emotion and even medical conditions. But now, ...

The pupil responds to light, which is essential for our vision and how we see our surroundings. Three known mechanisms change ...

They also tend to have pupils that open more widely in low light. So, at the outset, nocturnal eyes gather more light than human eyes do. After the light passes through the pupil, it is focused by ...

A person’s pupils may be of different sizes (anisocoria) for several reasons, including physical trauma, response to light, and infection. The condition may also be present from birth.

Our pupils are never static; they constantly adjust in response to both external and internal factors. The most well known is that they control how much light enters the eye, just like a camera ...

Pupillometry measures the size and reactivity of the pupil, the dark circle at the eye’s centre through which light enters. Typically, the pupil contracts and dilates depending on the amount of ...

The pupil size changes depending on the amount of light in the surroundings. Light levels can be measured using a light meter. Units of light are measured in lux. The higher the lux reading ...