Photic Stimulation in Color: RGB Absorption Through Eyelids

This seems like a big deal. You can't get a white blend if your R of the RGB is massively stronger without affecting its intensity for example. I wonder why our eyes pass through red light and not the others? I mean what evolutionary thing could cause that? In any case I think this has real significance for people using photic stimulation (flashing lights particularly LEDs). It's too bad they didn't cover other colors and not just RGB.

Although it has been reported that light treatment during sleep can modify biological rhythms, the amount of light that is transmitted through the human eyelid has not been established. We evaluated eyelid transmission with a visual threshold response. Estimated light transmission through the eyelids was 0.3% for blue, 0.3% for green, and 5.6% for red light. The eyelid was an effective attenuator and acted as a red-pass filter. Illumination intensity and color balance after passing through the eyelid should be considered in evaluating the effects of light treatments during sleep.

from: Light attenuation by the human eyelid.
ANDO K, KRIPKE DF.
Biological Psychiatry 1996;39(1):22-5.
Department of Psychiatry, University of California, San Diego, USA

PJ

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