A variety of psychological and physical conditions can cause variations in the diameter of the pupil—the black center of the eye that changes in size to regulate the amount of light reaching the ...

When people feel disgust or sadness, their pupils involuntarily widen. Conversely, feelings of anger are associated with a ...

You have probably heard the saying that the eyes are the windows to the soul, but now it turns out that they are also connected to how we breathe. Scientists have long studied the size of our pupils ...

It is commonly known that pupil size fluctuates in response to brightness and darkness during wakefulness. What is less commonly known is that pupil size is also regulated by the autonomic nervous ...

OCT is a noninvasive, noncontact imaging system providing real-time, high-resolution, cross-sectional images using near infrared light interferometry. Pupil assessment can be performed using OCT to ...

Please provide your email address to receive an email when new articles are posted on . For all people, pupil size has an important role in balancing incoming light with depth of field to optimize ...

Tsukuba, Japan—Recent studies have revealed that mild forms of exercise, such as yoga or walking, can improve mood and enhance executive function, which involves the brain's prefrontal cortex and ...

Regular processes in the environment improve our eyesight. When we find something particularly beautiful or impressive, we literally get big eyes: Our pupils dilate. The pupil controls how much light ...