Pupillary Responses - Stanford Medicine There are a handful of pupillary abnormalities that every clinician should know Here we review the basic physiology then describe these abnormal pupillary responses and how to find them
How to Measure Pupillary Distance (PD) | Zenni Optical Pupillary distance (PD) measures the distance between the centers of your pupils and is used to center a prescription lens accurately in your frames Your optician will usually measure your PD or you can use our digital PD ruler to measure it quickly online
What Is Pupillary Distance (PD) How To Measure It Pupillary distance (PD) describes the amount of space between the pupils of your right and left eyes It is measured in millimeters (mm) and goes from the center of one pupil to the center of the other
Pupillary response - Wikipedia Constriction of the pupil occurs when the circular muscle, controlled by the parasympathetic nervous system (PSNS), contracts, and also to an extent when the radial muscle relaxes