Mild exercise like yoga improves mood and executive function, but the neural mechanisms were unclear. Using pupillometry, researchers found that pupil size changes during very light exercise predict ...

For over a century, scientists believed that light, focus distance, and cognitive effort were the main forces behind changes in pupil size. But a new discovery adds breathing to that list. Researchers ...

Researchers used quantitative pupillometry to detect pupillary changes in high-school athletes after they sustained a high-acceleration head impact. These pupillary changes, indicative of changes in ...

The eyes are a window into our autonomic nervous system. Everyone's unique personal history and autobiographical experiences have the power to influence how and when the sympathetic nervous system ...

The PERRLA test is a standard eye examination that can help healthcare professionals diagnose a wide range of health issues, including vision problems and some neurological conditions. People may ...

To investigate and correlate the frequency and types of pupil abnormalities that are associated with hereditary peripheral neuropathy in a large cohort of patients prospectively examined. A ...

Medically reviewed by Michael Menna, DO Key Takeaways The iris is the colored part of the eye that helps control how much ...

Please provide your email address to receive an email when new articles are posted on . In patients with ptosis, a large pupil may be indicative of third nerve palsy. Levator function measurement can ...