Jul 25, 2023 · The pupillary light reflex constricts the pupil in response to light, and pupillary constriction is achieved through the innervation of the iris sphincter muscle. Eyes allow for visualization of the world by receiving and processing light stimuli.

Pupillary response is a physiological response that varies the size of the pupil between 1.5 mm and 8 mm, [1] via the optic and oculomotor cranial nerve. A constriction response (miosis), [2] is the narrowing of the pupil, which may be caused by scleral buckles or drugs such as opiates / opioids or anti-hypertension medications.

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.

In this review, I describe these three pupil responses, how they are related to high-level cognition, and the neural pathways that control them. I also discuss the functional relevance of pupil responses, that is, how pupil responses help us to better see the world.

Aug 8, 2023 · Pupillary light reflexes require both optic and oculomotor nerve (cranial nerve III) to constrict pupils upon light exposure. The optic nerve mediates the afferent limb of the pupillary reflex, whereas the oculomotor nerve involves the efferent limb of the reflex.

The guidelines cover specific applications, including the afferent pupil light response and conditions for differentiating the pupil light reflex initiated by rhodopsin-driven rod responses, opsin-driven cone responses, and/or melanopsin-driven ipRGC responses, the efferent pupillary pathway, pharmacological effects on the pupil, pupillography ...

Pupillary response varies the size of the pupil of the eye via the iris dilator muscle, which dilates in response to a stressor. Three widely accepted and used measures of pupillary response are the Colvard Pupillometer, Dynamic Binocular Infrared Pupillometer, and …