Pupillometry
Videos
Pupillometry, the measurement of pupil size and reactivity, is a key part of the clinical neurological exam for patients with a wide variety of neurological injuries. It is also used in psychology.
NeuroLight pupillometer and its QPi score (IDMed, Inc)
Pupillary light reflex
Videos
The pupillary light reflex or photopupillary reflex is a reflex that controls the diameter of the pupil, in response to the intensity of light that falls on the retinal ganglion cells of the retina in
Pupillometry
…and economical way to determine pupil size and dynamic response objectively. However, another study has shown the necessary use of an opaque eyecup as pupillary light reflex is affected by ambient light. It is important to mention that certain pupillometers and all smartphones do not have this particular feature. Numerous…
Variation in the size of the pupil in bright (left) and dim (right) environments. In this case the pupil is 3 mm in diameter on the left, and 9 mm on the right
Schematic diagram of pupillary light reflex neural pathway
A medical halogen penlight used to observe pupillary light reflex.