Summary
This thesis investigates how removing short-wavelength blue light (450-480 nm) from white light sources affects the circadian system's ability to reset its phase, with implications for designing lighting that minimizes circadian disruption. The findings are relevant to applications such as evening lighting, blue-light filtering glasses, and environments where circadian phase preservation is important.
Key Findings
- Non-visual light responses including circadian phase resetting show peak spectral sensitivity in the 450-480 nm (short-wavelength/blue) range, consistent with melanopsin-based photoreception.
- Filtering short wavelengths from polychromatic white light (~100 µW/cm²) was examined as a strategy to reduce circadian phase-shifting effects while maintaining visual illumination.
- The study supports the principle that selective removal of short wavelengths from white light can attenuate circadian photic entrainment signals mediated through the SCN.
Categories
Sleep & Circadian Health: Examines how filtering short-wavelength (450-480 nm) light from white light affects circadian phase resetting and entrainment via the SCN.
The Science of Light: Investigates spectral sensitivity of non-visual photoreceptors (melanopsin/ipRGCs) and their role in circadian photic responses to filtered polychromatic white light.
Author(s)
B Gladanac
Publication Year
2014
Related Publications
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 two‐process 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
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