virtual darkness

Noun

 * 1) An environment that has some of the physiological effects of darkness.
 * 2) * 1942, IH Wagman, JE Gullberg, "The Relationship between Monochromatic Light and Pupil Diameter. The Low Intensity Visibility Curve as Measured by Pupillary Measurements. American Journal of Physiology, 137: 769-778
 * Infrared photography is the most suitable method for accurately measuring the diameter of the pupil in virtual darkness as well as under any condition of light
 * 1) * 2007, Phelps J., Dark therapy for bipolar disorder using amber lenses for blue light blockade. Medical Hypotheses, July 14, 2007, [Epub ahead of print] 17637502
 * "[V]irtual darkness" may be achievable by blocking blue wavelengths of light. Therefore it may be possible to influence human circadian rhythms by using these lenses at night to blunt the impact of electrical light, particularly the blue light of ubiquitous television screens, by creating a "virtual darkness".
 * 1) * 2007, Phelps J., Dark therapy for bipolar disorder using amber lenses for blue light blockade. Medical Hypotheses, July 14, 2007, [Epub ahead of print] 17637502
 * "[V]irtual darkness" may be achievable by blocking blue wavelengths of light. Therefore it may be possible to influence human circadian rhythms by using these lenses at night to blunt the impact of electrical light, particularly the blue light of ubiquitous television screens, by creating a "virtual darkness".