Summary
This technical report introduces intrinsically photosensitive retinal ganglion cells (ipRGCs), a third type of photoreceptor discovered in the 1990s, and their role in non-visual light responses. Understanding ipRGC function is foundational for lighting designers seeking to develop circadian-supportive lighting systems that go beyond visual illumination.
Key Findings
- ipRGCs were identified as a third class of photoreceptor in the 1990s, distinct from rods and cones, with roles in circadian entrainment and non-visual light responses.
- The report signals growing research interest in ipRGC function as a basis for updated lighting standards and design guidance.
Categories
The Science of Light: Covers the discovery and function of ipRGCs, a foundational topic in photoreceptor biology and circadian photoentrainment.
Sleep & Circadian Health: ipRGC function is directly relevant to understanding light-driven circadian rhythm entrainment and melatonin regulation.
Author(s)
FL Handbook, P Lutkevich, D McLean, J Cheung
Publication Year
2012
Related Publications
The Science of Light
- Phototransduction by retinal ganglion cells that set the circadian clock
- Color appearance models
- The mammalian circadian timing system: organization and coordination of central and peripheral clocks
- Diminished pupillary light reflex at high irradiances in melanopsin-knockout mice
- Melanopsin is required for non-image-forming photic responses in blind mice
Sleep & Circadian Health
- Phototransduction by retinal ganglion cells that set the circadian clock
- The mammalian circadian timing system: organization and coordination of central and peripheral clocks
- The twoâprocess model of sleep regulation: a reappraisal
- Melanopsin is required for non-image-forming photic responses in blind mice
- Strange vision: ganglion cells as circadian photoreceptors