Summary
This study measured sustained pupil responses in 9 observers adapted to 5 spectrally distinct LED light sources at 100 and 210 lx, revealing how spectral composition beyond photopic luminance affects the pupillary light reflex. These findings are relevant for lighting designers selecting LED spectra, as sustained pupil size reflects melanopsin-driven (ipRGC) activation and can inform circadian and visual comfort considerations.
Key Findings
- Sustained pupil responses were recorded from 9 observers after 5-minute adaptation to 5 spectrally different LED illuminations at 100 lx and 210 lx
- Warm white and cool white commercial LEDs produced differing sustained pupil responses, indicating spectral power distribution affects post-adaptation pupil size beyond photopic luminance alone
Categories
The Science of Light: Measures sustained pupil response across spectrally different LED illuminations to understand melanopsin and photoreceptor contributions to the pupillary light reflex.
Eye Health & Vision: Pupillary light reflex data across spectral conditions provides insight into visual system responses to different LED light sources.
Author(s)
J Le Rohellec, F Viénot, JL Anton, B Nazarian
Publication Year
2013
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