Ambulant recording of light for vision and non-visual biological effects

Data on the exposure of the human eye to light are essential for investigation into the interaction of light with man. According to present knowledge, two different spectral sensitivities of the visible irradiance are relevant: (1) the spectral luminous efficiency function for vision and (2) the action spectrum for melatonin suppression, also used for other non-visual biological effects. We developed a device called LuxBlick to measure and record both quantities. It consists of two light sensors that are fixed on the wearer’s head, and a control unit and data recording mini-computer worn in a bag around the waist. Real-time data are accessible to those wearing the device. Suitable to be worn in everyday life, the parts at the head are of low mass at the head and inconspicuous.

[1]  A.W.S. Tarrant,et al.  A study of lighting in the home , 1983 .

[2]  D. Skene,et al.  An action spectrum for melatonin suppression: evidence for a novel non‐rod, non‐cone photoreceptor system in humans , 2001, The Journal of physiology.

[3]  A. Wirz-Justice,et al.  High sensitivity of human melatonin, alertness, thermoregulation, and heart rate to short wavelength light. , 2005, The Journal of clinical endocrinology and metabolism.

[4]  M Kundi,et al.  Personal light dosimetry in permanent night and day workers. , 1993, Chronobiology international.

[5]  R. Kronauer,et al.  Sensitivity of the human circadian pacemaker to nocturnal light: melatonin phase resetting and suppression , 2000, The Journal of physiology.

[6]  G. Brainard,et al.  Action Spectrum for Melatonin Regulation in Humans: Evidence for a Novel Circadian Photoreceptor , 2001, The Journal of Neuroscience.

[7]  G. Brainard,et al.  Inferior Retinal Light Exposure Is More Effective than Superior Retinal Exposure in Suppressing Melatonin in Humans , 2003, Journal of biological rhythms.

[8]  E. Hilger.  Lichttherapie bei SAD und S-SAD , 2004 .

[9]  Mark S. Rea,et al.  Design and optimization of a retinal exposure detector , 2000, SPIE Optics + Photonics.

[10]  A. Kooijman,et al.  Light distribution on the retina of a wide-angle theoretical eye. , 1983, Journal of the Optical Society of America.

[11]  D. Dijk,et al.  Dose-response relationship for light intensity and ocular and electroencephalographic correlates of human alertness , 2000, Behavioural Brain Research.

[12]  Richard E. Kronauer,et al.  Dose-response relationships for resetting of human circadian clock by light , 1996, Nature.

[13]  D. Kripke,et al.  Naturalistic studies of human light exposure. , 1983, The American journal of physiology.

[14]  Mark S. Rea,et al.  The Daysimeter: a device for measuring optical radiation as a stimulus for the human circadian system , 2005 .

[15]  J. Pokorny,et al.  Melanopsin-expressing ganglion cells in primate retina signal colour and irradiance and project to the LGN , 2005, Nature.

[16]  Daniel F. Kripke,et al.  Natural light exposure of young adults , 1986, Physiology & Behavior.