Circadian Health Glossary
Intrinsically Photosensitive Retinal Ganglion Cells (ipRGCs)
ipRGCs represent a distinct class of neurons found in the mammalian retina, setting them apart from traditional photoreceptors like rods and cones. Their unique ability to directly react to light stems from melanopsin, a light-sensitive protein they contain, positioning them as the eye's third type of photoreceptor.
Function
ipRGCs play an important role in light responses not related to image formation. They are pivotal in controlling different physiological functions such as the body’s circadian rhythm. Additionally, there is research to suggest they may have an impact on specific visual functions such as:
- Circadian rhythm
- Pupillary light reflex
- Sleepregulation
- Potentially some aspects of the vision